Biomass Conversion and Biorefinery最新文献

{"title":"Isolation and characterization of novel natural fiber from Streblus asper","authors":"H. Jeevan Rao, P. Senthamaraikannan, Indran Suyambulingam, Jyotishkumar Parameswaranpillai, G. Suganya Priyadharshini, B. Senthilkumar","doi":"10.1007/s13399-024-06136-6","DOIUrl":"https://doi.org/10.1007/s13399-024-06136-6","url":null,"abstract":"<p>Determining cost-effective and sustainable materials is challenging. So far, the fibers from <i>Streblus asper</i> have not been studied for versatile applications. The current investigations focused on the extraction and characterization of novel fiber from the <i>Streblus asper</i> tree through the water retting process. The study revealed that the extracted fiber has a cellulose content of 55.4 ± 5.6 wt.%, hemicellulose of 12.24 ± 3.31 wt.%, and lignin of 14.25 ± 4.56 wt.%. Also, the study revealed that the fiber has a density of 1388 ± 75 kg/m³, tensile strength of 347.5 ± 16.4 MPa, thermal stability of ca. 250 °C, crystallinity index of 29.9%, and crystalline size of 1.45 nm. Additionally, the surface morphology and the elemental composition analysis indicated fibril bundles and the presence of calcium, silicon, chlorine, and potassium, along with carbon and oxygen. Furthermore, atomic force microscopy revealed high surface roughness for the extracted fiber. These findings suggest that the <i>Streblus asper</i> fiber is a suitable substitute for many synthetic fibers used in plastic-reinforced composites.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"75 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257502","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":"Eco-friendly synthesis and characterization of ZnO and Mg-Ag-doped ZnO nanoparticles using Phoenix dactylifera L. seeds: exploring biological activity and structural properties","authors":"Dalal Doudi, Nasma Mahboub, Noura Gheraissa, Ibtissam Laib, Nezar Cherrada, Ridha Messai, Noureddine Slimani","doi":"10.1007/s13399-024-06115-x","DOIUrl":"https://doi.org/10.1007/s13399-024-06115-x","url":null,"abstract":"<p>This study focuses on the green synthesis of zinc oxide (ZnO) and magnesium-silver-doped zinc oxide (Mg-Ag-doped ZnO) nanoparticles (NPs) via biomass conversion of Algerian Ghars date palm (<i>Phoenix dactylifera</i> L.) seeds. Aqueous extracts of the seeds were utilized as reducing and stabilizing agents in the biogenic synthesis process. Structural, compositional, and morphological analyses, including X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy-energy-dispersive X-ray analysis (SEM-EDAX), and ultraviolet–visible spectroscopy (UV–Vis), confirmed the successful formation of pure and Mg-Ag-doped ZnO NPs. The UV–Vis absorption spectra showed a shift from 395.6 nm (pure ZnO) to 373.2 nm (Mg-Ag doped), with corresponding energy values increasing from 3.13 to 3.32 eV, indicating changes in electronic structure due to doping. XRD analysis revealed an increase in average crystallite size from 12.8 nm (ZnO) to 22.0 nm (Mg-Ag ZnO) and a noticeable shift in peak positions, confirming successful doping. Biological evaluations demonstrated that Mg-Ag-doped ZnO NPs exhibited enhanced photocatalytic, antibacterial, antioxidant, and antidiabetic activities compared to undoped ZnO NPs. Notably, Mg-Ag ZnO NPs showed superior antioxidant activity with an IC₅₀ of 10.78 mg mL⁻¹ and EC₅₀ of 0.79 mg mL⁻¹, compared to ZnO NPs with an IC₅₀ of 11.51 mg mL⁻¹ and EC₅₀ of 0.84 mg mL⁻¹. They also exhibited higher photocatalytic degradation efficiency of methylene blue dye (93% vs. 87% for ZnO) under UV light. Antibacterial studies showed that Mg-Ag ZnO NPs had lower minimum inhibitory concentrations (MIC) and minimum bactericidal concentrations (MBC) than pure ZnO NPs, with a MIC of 0.625 mg mL⁻¹ and MBC of 0.625 mg mL⁻¹ for <i>E. coli</i>, compared to 2.5 and 10 mg mL⁻¹, respectively, for pure ZnO. Furthermore, Mg-Ag-doped ZnO NPs exhibited significant α-amylase inhibition (48.0% at 0.25 mg mL⁻¹), outperforming pure ZnO NPs (38.9% at the same concentration), and showed competitive inhibition to the reference drug acarbose in antidiabetic tests. These findings highlight the potential of rationally designed biogenic ZnO nanostructures synthesized through biomass conversion of <i>P. dactylifera</i> seeds, especially after strategic doping, for various biomedical and environmental applications. This green synthesis approach, utilizing renewable biomass, offers an eco-friendly and sustainable route for producing ZnO-based nanomaterials with tunable properties.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"81 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257461","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":"Spent coffee activated carbon via microwave-induced H3PO4 activation for brilliant green dye removal: statistical parametric optimization","authors":"Ahmad Hapiz,&nbsp;Muhammad Arif Asyraaf Ramlan,&nbsp;Lee D. Wilson,&nbsp;Zeid A. ALOthman,&nbsp;Ali H. Jawad","doi":"10.1007/s13399-024-06139-3","DOIUrl":"10.1007/s13399-024-06139-3","url":null,"abstract":"<div><p>Herein, spent coffee (SPC) was converted to activated carbon (SPCAC) via microwave-assisted H₃PO₄ activation. The microwave power was set at 600 W and irradiation time 15 min with an impregnation ratio of precursor/chemical activator (1-g SPC:2-mL H₃PO₄). The surface property and functionality of SPCAC was investigated by several analytical techniques that include gas adsorption (BET), SEM, XRD, FTIR, and pH_pzc. The applicability of the SPCAC adsorbent was evaluated for the removal of cationic brilliant green (BG) dye from aqueous solution. Thus, the adsorptive removal process was optimized using the Box-Benken design (BBD) to assess key adsorption parameters that include SPCAC dosage (0.05–0.15 g/100 mL) coded as (A), solution pH (4–9) coded as (B) and contact time (30 to 360 min) coded as (C). The analysis of variance (ANOVA) test shows the significant interaction between the key adsorption parameters (AB, AC, and BC). From BBD results, optimal BG dye removal (99.6%) was recorded at 0.15 g of SPCAC dose, pH 6.5, and a 30-min contact time. The adsorption mechanism of BG dye onto SPCAC was assigned to various factors that include pore filling, electrostatic forces, π-π stacking, and H-bonding. Thus, the finding of this research shows the potential benefits of converting spent coffee into active carbon by using a convenient thermochemical method with practical application for the removal of toxic cationic dyes from aqueous media.</p></div>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"15 9","pages":"13485 - 13497"},"PeriodicalIF":3.5,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257503","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":"Mathematical modeling of an isothermal tubular bioreactor coupled with batch culture for ethanol production: a one-dimensional approach","authors":"Saleh Al Arni, Attilio Converti, Mahmoud Elwaheidi, Sami Elmadssia, Sufian A. Badawi","doi":"10.1007/s13399-024-06156-2","DOIUrl":"https://doi.org/10.1007/s13399-024-06156-2","url":null,"abstract":"<p>Alcohol fermentation in batch culture was carried out to determine the behavior of biomass transport phenomena along the bioreactor. The applied methodology utilized both a one-dimensional theoretical modeling of biomass transfer in a tubular bioreactor associated with alcohol fermentation in batch culture and an experimental approach based on a triplicate run. The model’s predictions are validated against experimental data obtained from a real bioreactor system, demonstrating its accuracy and reliability for practical applications. Furthermore, the model solution demonstrated that the converging of biomass concentration in the 5-point nodal bioreactor depends on the values of the model parameters, namely the maximum specific growth rate (<i>μ</i>_max), the diffusivity coefficient (<i>D</i>), dimensionless coefficient (α) and reciprocal of doubling time (β). The experimental results show that distribution of biomass concentration along the reactor column is in the range between 3.40 and 3.62 g_DW L⁻¹ with an average value of about 3.52 g_DW L⁻¹. Furthermore, the average final ethanol concentration is about 58 g L⁻¹ after an average fermentation time of about 35 h and an average starting sugar concentration of about 65 g L⁻¹.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"48 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257508","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":"Ionic liquid and organosolv pretreatments of horse manure: impact on lignin telomerization by organometallic catalysis and methanization","authors":"Lindsay Dorschner Pelcoq,&nbsp;Clément Dumont,&nbsp;Tiphaine Richard,&nbsp;Arash Jamali,&nbsp;Mathieu Sauthier,&nbsp;Catherine Sarazin,&nbsp;Eric Husson","doi":"10.1007/s13399-024-06133-9","DOIUrl":"10.1007/s13399-024-06133-9","url":null,"abstract":"<div><p>To deal with the high lignin content of horse manure in the methanization process, eco-fractionation and chemical modification strategies of lignin have been proposed, opening up prospects for new lignin-based thermoplastic materials. Firstly, a strategy inspired by the biochemical pathway and based on ionic liquid pretreatment, with appropriate recyclability and biodegradability characteristics, was implemented. A sugar-enriched fraction was recovered after enzymatic hydrolysis and a lignin-enriched fraction was isolated (80% w/w). The second strategy was an organosolv process, using the easily biodegradable 2-methyltetrahydrofurane-3-one, allowing selective extraction of a lignin-enriched fraction (&gt; 80% w/w almost sugar-free) and a partially delignified sugar solid fraction. H/G/S ratios and aryl-ether linkages showed little difference for the two isolated lignins, which may be responsible for the more successful palladium-catalyzed telomerization of 1,3-butadiene on the phenolic and carboxylic hydroxyls of organosolv lignin. Whatever the strategy used, carbohydrate fractions showed competitive biochemical methane potential for methanization.</p></div>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"15 10","pages":"15261 - 15276"},"PeriodicalIF":3.5,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13399-024-06133-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of hydrothermal pretreatment at different temperatures on biomethane yield in anaerobic digestion of rice husk","authors":"Subodh Kumar, Tinku Casper D’ Silva, Ram Chandra, Anushree Malik, Virendra Kumar Vijay, Ashish Misra","doi":"10.1007/s13399-024-06106-y","DOIUrl":"https://doi.org/10.1007/s13399-024-06106-y","url":null,"abstract":"<p>The inadequate conversion of rice husk (RH) into biogas due to its recalcitrant lignocellulosic structure and high silica content necessitates the requirement of pretreatment prior to anaerobic digestion (AD) of RH. This study evaluated the impact of hydrothermal pretreatment on the solubilization of complex lignocellulosic matrix of RH and its subsequent influence on biogas and biomethane yield. The RH was pretreated at six different temperature levels between 200 and 250 °C, at an interval of 10 °C with 20% total solids (TS) loading and retention time of 10 min. The solubilization of RH at different pretreatment temperatures was evaluated by characterizing the liquid and solid fractions of the pretreated RH. The AD of untreated and pretreated RH revealed that the highest biogas and biomethane yields of 355 ± 34 mL/g VS_input and 153 ± 20 mL/g VS_input were observed for RH pretreated at 230 °C, 4.5 and 5.7 times higher than untreated RH. This increase in biogas and biomethane yield for RH230 was confirmed by observing enhanced volatile solid (VS) reduction (38.72%) and biodegradability (39.40%) compared to VS reduction (8.87%) and biodegradability (7.02%) for untreated RH. Further, correlation matrix analysis revealed a strong relation between pretreatment temperature and its severity on the fate of utilizing RH as an AD substrate and obtaining maximal biogas yield. Conclusively, pretreatment up to 230 °C could be recommended to enhance biogas and biomethane yield from RH effectively. Further investigation in pilot-scale reactors is recommended to validate these findings.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"24 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257510","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":"Unlocking xylan’s potential: Coffee husk-derived xylanolytic blend for sustainable bioprocessing","authors":"Taíse Amorim Ribeiro, Igor Carvalho Fontes Sampaio, Iasnaia Maria de Carvalho Tavares, Isabela Viana Lopes de Moura, Fabiane Neves Silva, Luise de Oliveira Sena, Floriatan Santos Costa, Gabriel Lucas Silva de Jesus, Iana Trevizani Emmerich, Kendria Santos Cezar, Muhammad Irfan, Marcelo Franco","doi":"10.1007/s13399-024-06150-8","DOIUrl":"https://doi.org/10.1007/s13399-024-06150-8","url":null,"abstract":"<p>Xylanolytic enzymes cleave the β-1,4-glycosidic bonds within xylan, the primary polymer found in the hemicellulosic fraction of lignocellulosic biomass, converting it into xylose. This enzymatic class holds significant applications in various biotechnological processes, particularly within the pharmaceutical, food, and bioenergy industries. This study focuses on a cost-effective method for producing a xylanolytic blend (XB) through the solid-state fermentation of the low-cost coffee husk (CH) by-product, using <i>Penicillium roqueforti</i> ATCC 10110. Optimal bioprocess conditions were identified at 59% humidity and 16 °C, resulting in xylanolytic activity of 13.20 U/g. The XB exhibited favorable thermostability at 40 °C, with maximum activity at 50 °C and pH 5. The effect of solvents revealed significantly enhanced activity with dichloromethane and hexane. The presence of metallic salts, including Pb(C₂H₃O₂), Na₂CO₃, KCl, FeSO₄, CuSO₄, MgSO₄, and ZnSO₄, led to more than a 100% increase in enzyme activity, with Na₂CO₃ demonstrating an outstanding 229.9% enhancement. Similarly, other organic compounds such as EDTA, SDS, Triton X-100, and Trolox significantly increased enzymatic activity (+ 286.69% for Triton X-100), while other salts such as CaCO₃, MgCl₂, and Al(NO₃)₃ led to inhibition. These results differ from previous reports of xylanases from this microorganism and position the developed XB as a promising sustainable catalyst for the saccharification of CH. The bio-based recycling approach elevates the value of CH and proposes an alternative to conventional fertilizer use. The basis developed here serves as guidelines for further investigations exploring the XB application in high-grade pharmaceuticals, food, and bioenergy in large-scale scenarios.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"301 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257506","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":"Optimization and comparative analysis of acetamiprid removal from aqueous solutions using activated carbon and nanofiltration techniques","authors":"Roumaissa Boumaraf, Sami Khettaf, Fatiha Benmahdi, Rida Masmoudi, Mousaab Belarbi, Azedine Ferhati","doi":"10.1007/s13399-024-06151-7","DOIUrl":"https://doi.org/10.1007/s13399-024-06151-7","url":null,"abstract":"<p>Acetamiprid (ACMP) is a significant neonicotinoid insecticide recognized for its efficacy against various insects. The increasing use of insecticides in agriculture substantially threatens water resources and ecosystems. Thus, effectively removing pesticide residues is crucial to mitigating the adverse effects of conventional agricultural practices. This study aims to enhance the elimination of ACMP from water using a dual approach: nanofiltration and activated carbon derived from silver berry seeds. Various physicochemical parameters, including contact time, AC dose, agitation speed, and the initial pH, were examined to understand their impact on the ACMP removal process through adsorption. Remarkably, a 97% removal of ACMP was achieved under a contact time of 90 min, an agitation speed of 300 rpm, and an AC dosage of 500 mg·L⁻¹. The adsorption equilibrium data were modeled using the Freundlich, Langmuir, and Temkin isotherm models, with the Langmuir model providing the best fit and indicating a maximum adsorption capacity of 193.92 mg·g⁻¹. Kinetic studies with PFO and PSO models showed that the PSO model provided an excellent fit with high regression coefficients (<i>R</i>²). Thermodynamic analysis confirmed that the adsorption process is both endothermic and spontaneous. Concurrently, the nanofiltration process was optimized by examining the initial pH, recirculation flow rate, initial ACMP concentration, and the presence of salts. Results indicated a remarkable removal efficiency of 97.5% at a 6-bar transmembrane pressure and 750 mL·min⁻¹ as a recirculation flow rate. This study validates nanofiltration for ACMP removal, offering insights into mitigating pesticide residues’ environmental impact</p><h3 data-test=\"abstract-sub-heading\">Graphical abstract</h3>\u0000","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"17 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257509","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":"Optimization and characterization of active bio-plastic film from tamarind (Tamarindus indica L.) seed starch enriched with red grape pomace extract","authors":"Tigist Girma Moges, Habtamu Shebabaw Kassa, Henock Woldemichael Woldemariam","doi":"10.1007/s13399-024-06141-9","DOIUrl":"https://doi.org/10.1007/s13399-024-06141-9","url":null,"abstract":"<p>Active biodegradable films offer a promising solution to the issue of food contamination and loss by providing suitable packaging materials that help maintain food quality and extend shelf life. This study focused on optimizing and characterizing active bio-plastic films made from modified tamarind seed starch enriched with red grape pomace extract. The physical, mechanical, barrier, thermal, antioxidant, and antibacterial qualities of the films were assessed. Using response surface methodology, modified tamarind seed starch (MTSC), glycerol (GC), and red grape pomace extract concentration (RGPEC) were optimized to values of 3.5% w/v, 25% w/w, and 6% w/w, respectively, to develop active bio-plastic film using solvent-casting techniques. The film’s optimal tensile strength was improved significantly (<i>p</i> &lt; 0.05) from 11.87 ± 0.02 MPa for pure tamarind seed starch bio-plastic to 12.77 ± 0.02 MPa for active bio-plastic film, demonstrating improved the mechanical characteristics. When compared to the pure tamarind seed starch-based film, which had a water vapor permeability of 2.4 × 10^–10 ± 0.005 gm⁻¹h⁻¹Pa⁻¹, the optimized film enriched with red grape pomace had a water vapor permeability of 2.35 × 10^–10 ± 0.001 gm⁻¹h⁻¹Pa⁻¹, which was notable (<i>p</i> &lt; 0.05). The grape pomace extract exhibited higher antioxidant activity (IC₅₀ = 280.5 ± 0.042 µg mL⁻¹) compared to the active film (IC₅₀ = 556 ± 0.038 µg mL⁻¹) and non-active film (IC₅₀ = 320067.3 ± 0.024 µg mL⁻¹) in the DPPH assay. The extract also had larger zone of inhibition values against <i>Staphylococcus aureus</i> (10.00 ± 0.01 mm) in contrast to the active bio-plastic film (8.2 ± 0.02 mm). For <i>Escherichia coli</i>, the values were 8.5 ± 0.03 mm for the extract and 7.4 ± 0.05 mm for the active film. In non-active films (film without GPE), no antimicrobial activity was seen. The active bio-plastic film decomposed to about 63% of its original weight after 30 days. Overall, the active film exhibited positive mechanical, barrier, antibacterial, and antioxidant properties compared with pure tamarind seed starch film, making it appropriate for applications in food packaging.</p>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"20 1","pages":""},"PeriodicalIF":4.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257551","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":"Epoxidation of neem oil via in situ peracids mechanism with applied ion exchange resin catalyst","authors":"Ismail Md. Rasib,&nbsp;Nabisab Mujawar Mubarak,&nbsp;Intan Suhada Azmi,&nbsp;Mohd Jumain Jalil","doi":"10.1007/s13399-024-06137-5","DOIUrl":"10.1007/s13399-024-06137-5","url":null,"abstract":"<div><p>Epoxidized vegetable oils have the potential to replace polymers from petroleum sources. This paper investigates the effect of process parameters on the epoxidation of neem oil with applied Amberlite IR-120H. The method chosen for this study is forming performic acid as an oxidizing agent by mixing hydrogen peroxide with formic acid to form performic acid, where the molar ratio against neem oil varies accordingly. The highest relative conversion (51.5%) to oxirane is obtained when the formic acid/neem oil molar ratio is 1:1, hydrogen peroxide/neem oil is 4:1, the reaction temperature is maintained at 70 °C, and the stirring speed is maintained at 300 rpm with 1 g of catalyst loading. Both neem oil and its epoxide form are analyzed by FTIR, where the formation of an oxirane ring is shown at a wavenumber of 1240 cm⁻¹. Rate constant for epoxidation, <span>({k}_{2})</span> is 4.95 (mol/L⋅min), calculated by kinetic modelling and aligned with other researchers. Kinetic modelling also shows that simulation and experiment are in acceptable disparity, considering that a few assumptions had been made.</p></div>","PeriodicalId":488,"journal":{"name":"Biomass Conversion and Biorefinery","volume":"15 9","pages":"13707 - 13717"},"PeriodicalIF":3.5,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142257511","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}