Biofuels-Uk最新文献

{"title":"Comparative assessment of biochar produced from LDPE and neem leaves using batch and semi-batch biomass fuel-based reactors","authors":"Kingsley O. Iwuozor, Ebuka Chizitere Emenike, Joy Adeleke, Taiwo Temitayo Micheal, Samuel Ogunniyi, Adewale George Adeniyi","doi":"10.1080/17597269.2023.2281099","DOIUrl":"https://doi.org/10.1080/17597269.2023.2281099","url":null,"abstract":"AbstractThis research aims to investigate and compare the properties of biochar derived from low-density polyethylene (LDPE) and neem leaves, utilizing both batch and semi-batch biomass fuel-based reactors for co-carbonization. While previous studies have primarily employed electrical-powered or biomass fuel-based batch reactors, this study introduces the innovative approach of utilizing a semi-batch reactor, marking a significant advancement in biochar production. The co-carbonization process lasted for ∼2 h in the batch-based system and nearly 3 h in the semi-batch system. The semi-batch system achieved higher temperature peaks in comparison to the batch-based system. In terms of biochar yield, the batch-based system generated a biochar yield of 30.35%, while the semi-batch system yielded 17.3%. Through BET analysis, it was determined that the biochar produced using the semi-batch reactor had a surface area of 227 m2/g and a pore diameter of 2.116 nm. Similarities and differences in functional groups among the biochar samples produced using the semi-batch and batch reactors were identified through FTIR analysis. By utilizing EDX spectroscopy, it was observed that the batch-based system contained seven elements, whereas the semi-batch-reacted sample had similar elements but lacked nitrogen, potassium, and magnesium. The semi-batch-reacted sample exhibited an increased carbon content, whereas the concentrations of other elements decreased when compared to the batch-reacted sample. The biochar samples can be applied in various applications, including water treatment, energy conversion, and storage. The findings of this study contribute to sustainable waste management practices, carbon sequestration efforts, and the development of innovative solutions for various industries.Keywords: Batch reactorcharacterizationenergy utilizationgasificationgreen chemistrysemi-batch reactor Author contributionsKingsley O. Iwuozor: conceptualization, data curation, formal analysis, investigation, methodology, validation, visualization, roles/writing—original draft, writing—review and editing. Ebuka Chizitere Emenike: conceptualization, data curation, formal analysis, investigation, methodology, validation, visualization, writing—review and editing. Joy Adeleke: conceptualization, data curation, formal analysis, investigation, methodology, validation, visualization, writing—review and editing. Taiwo Temitayo Micheal: validation, visualization, roles/writing—original draft, writing—review and editing. Ogunniyi Samuel: validation, visualization, roles/writing—original draft, writing—review and editing. Adewale George Adeniyi: conceptualization, data curation, formal analysis, investigation, methodology, supervision, validation, visualization, writing—review and editing.Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work received no external funding.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135186733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bio-electricity production in a single-chamber microbial fuel cell using urine as a substrate","authors":"Wilgince Apollon, Sathish-Kumar Kamaraj, Humberto Rodríguez-Fuentes, Juan Florencio Gómez-Leyva, Juan Antonio Vidales-Contreras, María Verónica Mardueño-Aguilar, Alejandro Isabel Luna-Maldonado","doi":"10.1080/17597269.2023.2277991","DOIUrl":"https://doi.org/10.1080/17597269.2023.2277991","url":null,"abstract":"AbstractThis study aimed to evaluate the performance of a single-chamber microbial fuel cell (SC-MFC) using undiluted livestock urine (i.e. cow, goat, and sheep urine). Data showed that the MFC with cow urine reached a maximum power density of 110.72 ± 0.42 mW m−2 at the maximum current density of 230.88 ± 0.65 mA m−2 and voltage of 277 ± 0.04 mV in a polarization experiment. Whereas, in terms of the long-term operation experiment, the same reactor reached a maximum power density of 7.60 ± 0.06 mW m−2 (on day 10), with an external resistance of 1000 Ω. Besides, 44.30% of microorganisms (strains) were found in the anode of Sheep-MFC due to the association of urine with the substrate, compared to other reactors. The study's findings indicated that the composition of the livestock urine positively affected power generation in the evaluated MFCs. In addition, cow urine was the best substrate for driving MFC technology compared to other types of urine used in this study.Keywords: Electrochemically active bacteriamicrobial fuel cellpower densityorganic substrateurine waste AcknowledgmentsThe first author (WA) acknowledges the National Council of Humanities, Science, and Technology (CONAHCyT). In addition, the authors acknowledge the Support Program for Scientific and Technological Research (PAICYT) at the Autonomous University of Nuevo León, as well as the Molecular Laboratory at the Technological Institute of Tlajomulco for their support.Disclosure statementNo potential conflict of interest was reported by the author(s).","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135291542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Environmental footprint evaluation of Jatropha biodiesel production and utilization in Ethiopia: a comprehensive well-to-wheel life cycle analysis","authors":"Yohannes Alemu, Ramchandra Bhandari, Venkata Ramayya Ancha","doi":"10.1080/17597269.2023.2277990","DOIUrl":"https://doi.org/10.1080/17597269.2023.2277990","url":null,"abstract":"AbstractIn Ethiopia, a Life Cycle Analysis of Jatropha-based biodiesel was conducted using the Greenhouse Gases, Regulated Emissions, and Energy Use in Transportation model to assess energy consumption, efficiency, and greenhouse gas (GHG) emissions in the well-to-tank (WTT) and well-to-wheel stages. The inventory analysis involved field surveys and scenarios to evaluate energy savings, emission reductions, and air pollutants in biodiesel-diesel blends. In the WTT analysis, the energy consumption for producing 1 MJ of Jatropha-based biodiesel was found to be 0.43 MJ under rain-fed and 0.68 MJ under irrigated conditions. The net energy value was positive, and the net energy ratio was higher compared to that in other countries. The results show that GHG emissions at 19.8 g CO2 eq/MJ during the WTT stage can reduce environmental impacts by up to 45–87% depending on the type of irrigation used. When examining the global warming potential, it was found that the cultivation of Jatropha accounted for the highest share of GHG at 57.58%, followed by the biodiesel production process at 23.88%. On the other hand, vehicles employing B20 blend could replace 14.78% of fossil energy use and reduce 13.95% of GHG emissions per km, compared to pure diesel vehicle.Keywords: Jatropha biodieselGHG emissionLife cycle assessmentWell-to-tankWell-to-wheel AcknowledgmentsThe authors would like to acknowledge the German Federal Ministry of Education and Research (BMBF) for funding this research under the framework of the WESA-ITT project. Thanks are also due to the German Development Bank (KfW) for their support in the form of a scholarship to the corresponding author of this article through ExiST project.Author contributionsY.A., performed the data collection and literature review; R.B., V.R., and Y.A. developed the methodology, and performed the data analysis and simulation models; Y.A. and R.B. contributed to writing the paper; R.B. and V.R. reviewed and edited the manuscript; R.B., as a main supervisor, followed up all study steps and gave helpful advice. All authors discussed the results, and read and approved the manuscript. All authors have read and agreed to the published version of the manuscript.Disclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementThe data presented in this manuscript are available on request from the corresponding author.Additional informationFundingGermen Federal Ministry of Education and Research (BMBF) through its Project Management Agency (Pt-DLR) under the framework of WESA-ITT Project with grant No 01DG16010B, and Germen Development Bank (KfW) under ExiST Project with grant No. 51235 funded this research.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135390129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Potential of thermophilic bacteria isolated from cow dung-grass compost for bioethanol production using floral waste","authors":"Smita Dutta, Prerna J. Yesankar, M. Suresh Kumar","doi":"10.1080/17597269.2023.2274697","DOIUrl":"https://doi.org/10.1080/17597269.2023.2274697","url":null,"abstract":"AbstractIn recent years, various efforts have been invested in producing bioethanol from lignocellulosic biomass (LCB) using thermophilic bacteria. Twelve thermophilic ethanologenic bacteria were isolated from cow dung-grass compost using an enrichment technique, and the isolate, CSD6, which produced the highest bioethanol, was studied further. CSD6 utilized both pentose and hexose sugars producing ethanol, lactic acid and acetic acid as major soluble products and was identified through 16S rRNA gene sequencing as a strain of Geobacillus stearothermophilus. The highest ethanol production was found to be 25.05 mM from 5 g/L glucose, equivalent to 55% of the theoretical ethanol yield at 55 °C and initial pH 7.5. The isolate showed average tolerance to ethanol and acetic acid concentration and initial substrate loading. The bioethanol potential of CSD6 was also studied using autoclave-treated mixed floral waste (FW) as a no-cost substrate. CSD6 produced a maximum of 8.9 mM of bioethanol with a 75.47% decrease in reducing sugars using 20 g/L FW as substrate without any enzymatic pretreatment, indicating the ability of CSD6 to produce bioethanol from easily available substrates.Keywords: Bioethanol productionfloral wastethermophilic bacteriaGeobacillus AcknowledgementWe are thankful to the Director, CSIR- NEERI, Nagpur, India, for providing the necessary facilities and funds. We also would like to thank Dr. Anshuman A. Khardenavis, CSIR-NEERI, for allowing us to use his laboratory facilities.Author’s contributionSD: Conceptualization, Methodology, Investigation, Validation, Writing-Original Draft, Review and editing; PJY: Investigation, Writing- Review and Editing; MSK: Supervision, Conceptualization, Writing- Review and EditingDisclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementAll data generated during this study are included in this manuscript.Notes1 LCB- Lignocellulosic biomass, FW- Floral waste, GHG- Green house gas, MSW- Municipal solid waste, CBP- Consolidated bioprocessing, PCR- Polymerase Chain Reaction, CMC- carboxymethyl cellulose, TS- Total solid.Additional informationFundingThis research did not receive any specific grant from funding agencies in the public, commercial, or not-for-profit sectors.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhancing biochar properties through doping: A comparative study of sugarcane bagasse and chicken feather","authors":"Ebuka Chizitere Emenike, Victor Temitope Amusa, Kingsley O. Iwuozor, Toluwalase Ojeyemi, Taiwo Temitayo Micheal, Kehinde Temitope Micheal, Adewale George Adeniyi","doi":"10.1080/17597269.2023.2274694","DOIUrl":"https://doi.org/10.1080/17597269.2023.2274694","url":null,"abstract":"AbstractThis comparative study explores the production and characterization of biochar derived from a combination of sugarcane bagasse (SB) and chicken feathers (CF), with a doping strategy for each biomass in the other. Two biochars, SB92CF-BC (92% SB and 8% CF) and CF92SB-BC (92% CF and 8% SB), were produced using a top-lit updraft reactor, resulting in a yield of 34% and 27%, respectively. Fourier transform infrared spectroscopy (FTIR) analysis revealed characteristic functional groups in both biochars, with minimal impact from the doping process. Scanning electron spectroscopy (SEM) analysis showed distinct morphological features, with SB92CF-BC exhibiting a smoother surface and CF92SB-BC displaying an irregular and rough morphology. Energy dispersive X-ray spectroscopy (EDS) analysis confirmed the presence of several elements in both biochars, with a higher nitrogen content in CF92SB-BC. Brunauer-Emmett-Teller (BET) analysis demonstrated significant specific surface areas for both biochars, exceeding those reported for unmodified SB and CF biochars. The findings suggest potential synergistic effects resulting from the doping strategy. The study expands knowledge on biochar production from diverse biomass sources and highlights the potential for utilizing lignocellulosic and non-lignocellulosic biomass waste materials for sustainable biochar production.Article HighlightsComparative study on biochar production from sugarcane bagasse and chicken feathers.Unique properties observed in resulting biochars, including functional groups, morphology, and elemental composition.Versatile potential applications in soil amendment, carbon sequestration, and wastewater treatment.Keywords: Sustainable waste managementbiocharsugarcane bagassechicken feathersdoping AcknowledgementAll authors whose works are cited in this article are hereby acknowledged.Author contributionsEbuka Chizitere Emenike; Methodology, Data curation, Writing - original draft; Writing - review & editing; Victor Temitope Amusa; Writing - original draft; Writing - review & editing; Kingsley O. Iwuozor; Methodology, Writing - original draft; Writing - review & editing; Taiwo Temitayo Micheal; Writing - original draft; Writing - review & editing; Kehinde Temitope Micheal; Writing – original draft; Writing – review and editing; Adewale George Adeniyi; Conceptualization, Methodology, Writing - original draft; Writing - review & editing; Validation; SupervisionDisclosure statementNo potential conflict of interest was reported by the author(s).Data availability statementData sharing is not applicable to this article as no new data were created or analyzed in this study","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136067766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Proteobacterial dominance in endophytic bacterial diversity in switchgrass growing under nitrogen range and effect on plant growth","authors":"Rahul Bahulikar","doi":"10.1080/17597269.2023.2266629","DOIUrl":"https://doi.org/10.1080/17597269.2023.2266629","url":null,"abstract":"AbstractSwitchgrass (Panicum virgatum L.) is native to North America and cultivated as a forage and bioenergy crop. Inorganic fertilizers enhance biomass production, increase production costs, and pollute the environment. Switchgrass cultivation using an eco-friendly approach might be achieved by inoculation with beneficial microbes. Therefore, the diversity of cultivable endophytic bacteria from roots and shoots of switchgrass growing under a nitrogen regime was studied. The potential of bacteria for plant growth promotion (PGP) was tested under in vitro conditions. A total of 216 bacterial isolates obtained belonged to four phyla and 33 genera, and most isolates were obtained from plants growing under no (0 kg/ha) or low nitrogen (90 kg/ha) input, rather than higher N (180 kg/ha). Higher numbers of isolates belonged to the phylum Proteobacteria, and genus-wise representation showed the dominance of Pseudomonas, Enterobacter, and rhizobia. Bacterial isolates were tested for PGP properties, e.g. phosphate solubilization, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, Indole Acetic Acid (IAA) production, and nitrogen fixation. Many isolates were positive for one or more PGP properties. In in vitro analysis, selected bacterial isolates were inoculated in two commercial switchgrass cultivars and a showed cultivar-specific response. PGP isolates can be used for pot or field trials and eventually for the sustainable cultivation of switchgrass.Keywords: Biofuel plantendophytesplant growth promotionnitrogen fixation Disclosure statementThe author declares no competing interests.Additional declarationsAs the author used plant material and this study does not report any animal or human research, ethics approval, consent to participate, and consent for publication are not required.Author contributionsThe author carried out all experiments, data analysis, and manuscript writing.Data availability statementThe raw data are available on request to the corresponding author. The bacterial strains are available from the Noble Research Institute, Ardmore, OK, USA.Additional informationFundingNoble Research Institute, Ardmore, OK, USA. This is the link of the institute (https://www.noble.org/).","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135779395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biodiesel production from waste cooking oil using KOH/HY-type nano-catalyst derived from silica sand","authors":"Huda A. Abdul-Kader, Zaidoon M. Shakor, Bashir Y. Sherhan, Shurooq T. Al-Humairi, Mohamed Aboughaly, M. A. Hazrat, Islam Md Rizwanul Fattah","doi":"10.1080/17597269.2023.2267849","DOIUrl":"https://doi.org/10.1080/17597269.2023.2267849","url":null,"abstract":"AbstractThe present study aimed to synthesize a Y-nanozeolite catalyst using the hydrothermal method and Iraqi sand-derived silica as a low-cost and readily available raw material. The catalyst was tested before and after loading with potassium hydroxide (KOH). The experiments were conducted in a batch reactor under different temperatures (40, 50, and 60 °C) and a 3-h reaction time, using the prepared Y-catalyst with three different particle sizes (75, 600, and 1000 μm). The results showed that increasing the temperature and/or reaction time generally resulted in increased conversion and yield when the catalyst was unpromoted with KOH, reaching a range of 55.56% and 33.33%, respectively. However, a significant increase in the conversion and yield was observed after promoting the catalyst with 10% KOH molecules. The optimal conditions for achieving the highest conversion and yield of biodiesel were determined to be 86.67% and 82.22%, respectively. These conditions involved a temperature of 60 °C, a reaction time of 2 h, and the use of a catalyst with a particle size of 75 μm loaded with 10% KOH. The use of a heterogeneous catalyst loaded with the base in a low percentage helps to dispense with the use of homogeneous catalysts with a high percentage of bases.Keywords: Catalytic transesterification reactionbiodieselalternative fuelKOH/HY-type nano-catalystalternative nano silica AcknowledgmentsThe authors thankfully acknowledge scientific support of Department of Chemical Engineering and the Nanotechnology and Advanced Material Research Center, University of Technology-Iraq, Baghdad, Iraq.Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis research was funded by University of Technology Sydney through Strategic Research Support funding with grant number (324100.2200034).","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135778281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recent advancement in thermochemical conversion of biomass to biofuel","authors":"Huei Yeong Lim, Nor Adilla Rashidi, Muhamad Farhan Haqeem Othman, Intan Syafiqah Ismail, Syazmi Zul Arif Hakimi Saadon, Bridgid Lai Fui Chin, Suzana Yusup, Mohammad Nurizat Rahman","doi":"10.1080/17597269.2023.2261788","DOIUrl":"https://doi.org/10.1080/17597269.2023.2261788","url":null,"abstract":"AbstractBiofuel’s carbon neutrality possesses great potential in decarbonizing existing fossil fuels dependency. Biofuel can be produced from various low-cost and renewable wastes including agricultural residues and sewage sludge, through various methods like thermochemical and biological pathways, producing solid, liquid, or gaseous biofuels. Among the two, thermochemical methods offer significantly shorter reaction time and higher versatility toward feedstocks as compared to the biological route. Though, there are challenges caused by the biomass heterogeneity and low biofuel quality in thermochemical conversion methods. Hence, this review aims to discuss recent advancements of thermochemical conversion technologies of biomass to biofuel, including torrefaction, pyrolysis, transesterification, hydrothermal processing, and gasification. The challenges encountered in the thermochemical conversion methods are discussed and attempts made in resolving it are also reported. Furthermore, potentials of solid, liquid, and gaseous biofuels are also presented in terms of biomass resources availability, and applications in industry and transportation sectors. Overall, sustainable production and utilisation of biofuels are one highly potential alternative towards a net zero carbon future.Keywords: Biofuelbiomasscarbon neutralitythermochemical conversionwastes Competing interestThe authors declare no competing interest.Data availabilityNo datasets were generated or analysed during the current study.Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingThis work was supported by the Ministry of Higher Education, Malaysia under the HICoE research grant (cost centre: 015ME0-014).","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135993230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Kinetic evaluation of <i>Pachira aquatica</i> Aubl biomass slow pyrolysis towards to biochar production","authors":"J. S. Nascimento, E. R. Camelo, M. S. Carvalho, C. F. Virgens","doi":"10.1080/17597269.2023.2269735","DOIUrl":"https://doi.org/10.1080/17597269.2023.2269735","url":null,"abstract":"AbstractThe abrupt climate change, caused by the anthropogenic activities in the environment, intensified the search for sustainable sources of energy aiming reduce the dependence on fossil fuels. In this study, a multivariate study design was applied within a batch reactor system to determine the influence of process variables and kinetic parameters of slow pyrolysis of Pachira aquatica Aubl fruit peel towards biochar generation. The statistical evaluation of Box Behnken planning model was applied and showed good adjustment to the model establishing the model that describes the significant effect of variables behavior. The maximum biochar yield (41.22%) was observed were temperature (T) = 406 °C, heating rate β = 2 °C min−1, and residence time tR = 60 min, under nitrogen atmosphere. It is also observed that temperature was the most substantial influence on the process, followed by heating rate and the remaining process variables did not exhibit significant individual effects. The empirical model obtained was applied into mass change equation aiming calculate the activation energy (Ea)=77.10 kJ mol−1 and frequency factor (A0)= 6.28 × 1010 s−1. The low activation energy in maximum biochar yield region showed a great potential of Pachira aquatica Aubl fruit peel thermoconversion towards to biochar.Keywords: Biocharslow pyrolysiskineticsbiomassactivation energy AcknowledgmentsThe authors would like to thank Fundação de Amparo à Pesquisa do Estado da Bahia (FAPESB) for financing of the experimental pyrolysis unit (PLANT π/DCET-UNEB) through the agreement CNV.0076/2013, and Coordenação de aperfeicoamento de pessoal de nivel superior (CAPES) for financial support.Disclosure statementNo potential conflict of interest was reported by the authors.Data availability statementThe data that support the findings of this study are available from the corresponding author, Virgens, C.F., upon reasonable request.Additional informationFundingFapesb and Capes are prominent Brazilian fomentation agencies. Fapesb provided financial support through infrastructure grant CNV.0076/2013 (Project 10.13039/501100006181), while Capes generously awarded master’s scholarships to Juraci Nascimento and Mateus Carvalho.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136078841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Novel thermotolerant yeast suitable for industrial bioethanol production","authors":"Ifeanyi A. Ndubuisi, Chioma O. Amadi, Tochukwu N. Nwagu, Y. Murata, James C. Ogbonna","doi":"10.1080/17597269.2023.2267850","DOIUrl":"https://doi.org/10.1080/17597269.2023.2267850","url":null,"abstract":"AbstractA thermotolerant yeast capable of converting 100 g/L glucose to 46 g/L ethanol was isolated. The isolate was identified as a strain of Pichia kudriavzevii based on sequences generated by amplifying the 18s ribosomal DNA and a blast search on the NCBI database. The strain could grow and produce ethanol from 30 °C to 45 °C with theoretical ethanol yield above 90% and an ethanol productivity of 2 g/L/h. The strain produced ethanol at acidic pH of 1.5 and 3 at 37 °C and 42 °C respectively. At 42 °C, the strain could tolerate up to 10% ethanol which further increased to 15% when the temperature was reduced to 37 °C. Pichia kudriavzevii LC671435 could utilize peanut and soybean meal as nitrogen sources for ethanol production in addition to its ability to produce ethanol from fructose with the same efficiency as glucose. P. kudriavzevii LC671435 produced 0.47, 0.45 and 0.40 g ethanol/g glucose from 100 g/L, 160 g/L and 200 g/L glucose respectively at 42 °C. When used for repeated batch ethanol production, P. kudriavzevii LC671435 produced above 46 g/L ethanol up to fifth batch at 37 °C and fourth batch at 42 °C. With its thermotolerant ability, this novel isolate has great prospects for industrial fermentation at high temperature without additional cooling costs.Keywords: BioethanolfermentationPichia kudriavzeviiyeastthermotolerance Disclosure statementNo potential conflict of interest was reported by the authors.","PeriodicalId":56057,"journal":{"name":"Biofuels-Uk","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135759303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}