BioEnergy Research最新文献

{"title":"Integration of Random Forest Feature Importance and Machine Learning Frameworks for Prediction of Specific Surface Area of Biochar Derived from Rice Residues","authors":"Ayodeji Sulaiman Olawore,&nbsp;Kamoru Olufemi Oladosu,&nbsp;Kuan Yew Wong,&nbsp;M. W. Kareem,&nbsp;Maruf Yinka Kolawole,&nbsp;Nurudeen Sabi Saidu,&nbsp;Waliy Adeola Adesope","doi":"10.1007/s12155-026-11069-1","DOIUrl":"10.1007/s12155-026-11069-1","url":null,"abstract":"<div><p>The specific surface area (SSA) of biochar is a key property influencing its performance in soil amendment, wastewater treatment, and carbon sequestration. This study aimed to develop a hybrid data-driven framework integrating Random Forest-based feature importance with advanced machine learning (ML) models to predict the SSA of biochar derived from rice residue pyrolysis. Historical pyrolysis data were compiled from the literature, and missing values were treated using multiple imputation techniques, whose impact on model performance was systematically evaluated. Random Forest-based feature importance was applied to identify the dominant predictors as temperature, fixed carbon, and volatile matter. These predictors were used to develop Multi-Expression Programming (MEP), Gradient Boosting Regression Trees (GBRT), and Gaussian Process Regression (GPR) models. The MEP, GBRT, and GPR models have R² values of 0.910, 0.932, and 0.909, respectively, for the testing set. The GBRT model achieved the highest predictive performance, while MEP provided explicit mathematical expressions describing the nonlinear relationships between process variables and SSA. Cross-model consistency between the MEP sensitivity analysis and GBRT feature importance showed similar model-based rankings of the selected predictors. Although the models were developed using heterogeneous literature data from rice residues, the proposed framework demonstrates an effective and interpretable approach for predicting biochar SSA and can support the optimization of biomass pyrolysis processes.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149339594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Statistical Assesment of Biomass Homogenization for Controlling Lignin Variability in Coconut Fiber Residues","authors":"Omar Alberto Salinas Cruel,&nbsp;Ricardo Benítez Benítez,&nbsp;Fernando José Hernández","doi":"10.1007/s12155-026-11067-3","DOIUrl":"10.1007/s12155-026-11067-3","url":null,"abstract":"<div><p>One of the main limitations affecting the reproducibility of lignocellulosic biomass conversion processes is the compositional variability of the raw material. This study evaluates a simple homogenization strategy to stabilize lignin content in coconut fiber residues, assessing a 1:1 composite substrate from two geographically distinct sourcing lots in the Colombian Pacific (Cauca and Nariño) for process standardization. Because the Van Soest method calculates fiber fractions by sequential subtraction, one-way ANOVA revealed statistically significant differences between the two regional lots in all four structural fractions (cellulose, lignin, hemicellulose, and ash), with ash and hemicellulose showing the strongest effects. Given its dominant mechanistic role in biomass recalcitrance and chemical reactivity, lignin was selected as the critical control variable for subsequent equivalence and capability analyses. Two One-Sided Tests (TOST) for equivalence failed to demonstrate that the lignin content of the blend was practically equivalent to either regional source under a ± 2.5 margin, supporting the use of a blended substrate to moderate compositional extremes. A Process Capability Analysis (Cp/Cpk) showed that the homogenization protocol produced a stable, normally distributed system (<i>p</i> = 0.547, indicating no significant deviation from normality) with a Cpk of 0.82; although this value remains below the conventional industrial benchmark of 1.33, blending contained 98.6% of the composite’s lignin content within the regional natural limits (46.29–55.94%), representing a substantial reduction in variability relative to the unblended sources. This study does not aim to characterize coconut fiber itself, but to establish a statistical framework to transform compositional variability into a reproducible chemical substrate.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12155-026-11067-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149339453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Influence of Key Factors on Hydrolytic Enzyme Production by High Performance Recombinant Yeast for Consolidated Bioprocessing","authors":"Márcio D. N. Ramos,&nbsp;Teresa C. Zangirolami,&nbsp;Juliana P. Sandri,&nbsp;Bruna T. Carvalho,&nbsp;Maria Clara Sertori,&nbsp;Johan M. Thevelein,&nbsp;José R. Guimarães,&nbsp;Thais S. Milessi","doi":"10.1007/s12155-026-11068-2","DOIUrl":"10.1007/s12155-026-11068-2","url":null,"abstract":"<div><p>Consolidated Bioprocessing (CBP) is a promising technology for integrated biorefineries in which enzyme production, biomass hydrolysis, and the fermentation of C5 and C6 sugars into second-generation ethanol (2G ethanol) or other bioproducts are integrated into a single bioreactor. However, the development of a highly suitable microorganism for CBP, that efficiently secretes enzymes and ferments all released sugars simultaneously is still a challenge. Additionally, the selection of process conditions to enhance enzyme production and consequently biomass conversion is of high importance. In the present study, the influence of key process conditions on the production of hydrolytic enzymes and 2G ethanol by the yeast <i>Saccharomyces cerevisiae</i> AC14 (producer of seven hydrolytic enzymes) was investigated, aiming for its application in CBP. When evaluating the composition of the fermentative medium, pH and oxygen supply, the best results in enzymatic activities per dry cell weight - dcw (2.13 IU.g⁻¹_dcw of total cellulases, 102.0 U.g⁻¹_dcw of xylanases, 7.38 U.g^− 1_dcw of β-glucosidase and 25.5 U.g⁻¹_dcw of β-xylosidase), ethanol yield (90.3%) and ethanol productivity (1.0 g.L^− 1.h^− 1) were obtained using a fermentative medium containing a mixture of monomers and polymers, pH of 5.5 and anaerobic conditions. Most importantly, the presence of xylan was found to be crucial for cellulase secretion. Under the most appropriate conditions, repeated batches were carried out with cell recycling, reaching 10 cycles with total substrate conversion. Thus, the new knowledge regarding CBP obtained contributes to enhance its potential application in an integrated biorefinery context.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12155-026-11068-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149339480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Potential of the Scenedesmus and Desmodesmus Microalgae in Carbon Dioxide Biocapture","authors":"Lyubov Dyshlyuk,&nbsp;Alena Chizhova,&nbsp;Svetlana Ivanova,&nbsp;Ekaterina Budenkova,&nbsp;Egor Kashirskikh,&nbsp;Hamid Mukhtar,&nbsp;Muhammad Irfan,&nbsp;Olga Babich","doi":"10.1007/s12155-026-11066-4","DOIUrl":"10.1007/s12155-026-11066-4","url":null,"abstract":"<div><p>This study aimed to evaluate the ability of the <i>Scenedesmus</i> and <i>Desmodesmus</i> microalgae to biocapture carbon dioxide and accumulate lipids and pigments. In this study, the microalgae <i>Scenedesmus obliquus</i> S-321, <i>Scenedesmus rubescens</i> D-292, and <i>Desmodesmus communis</i> S-313 were cultured in the presence of different carbon dioxide concentrations (1–25%) to produce biomass and metabolites and fix CO₂. It was found that carbon dioxide at different concentrations (1–10% for <i>S. obliquus</i> S-321, 1–15% for <i>S. rubescens</i> D-292, and 1–20% for <i>D. communis</i> S-313) stimulated the growth of all the cultures studied. The <i>S. obliquus</i> S-321 showed the maximum biomass growth (1.47 ± 0.09 g L⁻¹) at a CO₂ concentration of 10% on the 14th day. For the <i>S. rubescens</i> D-292 strain, the maximum biomass growth (1.47 ± 0.09 g L⁻¹) on the 14th day of cultivation was determined at 5% CO₂ concentration in the medium. The <i>D. communis</i> S-313 strain showed the maximum biomass growth (2.24 ± 0.14 g L⁻¹) at a CO₂ concentration of 10% on the 14th day. When evaluating the lipid- and pigment-synthesizing capacity of microalgae cultured at different concentrations of carbon dioxide, it was found that CO₂ (1–15%) stimulated the accumulation of lipids, chlorophylls, and carotenoids in the cells of the strains tested. It was shown that the rate of carbon dioxide fixation by the studied strains increases with an increase in its concentration in the cultivation medium, while the efficiency of CO₂ biocapture decreases. The results of this study, conducted under laboratory-controlled conditions, indicate the promising use of microalgae of the genera <i>Scenedesmus</i> and <i>Desmodesmus</i> for the production of lipids and pigments with simultaneous assimilation of carbon dioxide.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149339264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Field Testing of Sorghum Lines with Stacked Coproduct and Low-Lignin Traits","authors":"Yang Tian,&nbsp;Christopher M. De Ben,&nbsp;Tari Lee Schramm,&nbsp;Emine Akyuz Turumtay,&nbsp;Alexis H. Tan,&nbsp;Victoria Saini,&nbsp;Anna Tang,&nbsp;Anna Z. Su,&nbsp;Jutta Dalton,&nbsp;Edward E. K. Baidoo,&nbsp;Robert Hutmacher,&nbsp;Jackie Atim,&nbsp;Daniel H. Putnam,&nbsp;Henrik V. Scheller,&nbsp;Corinne D. Scown,&nbsp;Aymerick Eudes","doi":"10.1007/s12155-026-11065-5","DOIUrl":"10.1007/s12155-026-11065-5","url":null,"abstract":"<div><p>The accumulation of value-added coproducts and the reduction of lignin levels are two essential traits for lignocellulosic biomass intended for bioenergy applications. Sorghum is a premier bioenergy crop candidate, distinguished by its substantial biomass productivity, minimal nutrient needs, and resilience to heat and drought. Brown midrib (BMR) mutants, genetic variants characterized by naturally low lignin content, are particularly promising due to their lower recalcitrance and higher polysaccharide content. While various genetic engineering strategies have been used to enhance the amount of high-value coproducts in sorghum, these traits have not been combined with low-lignin characteristics. We generated new sorghum lines by crossing engineered varieties that accumulate the coproducts protocatechuate (DHBA) or 4-hydroxybenzoate (4-HBA) with a low-lignin BMR line. These lines were field-tested at two different locations to determine biomass composition and yields. Findings indicated that DHBA production remained stable when stacked with the BMR trait, which also preserved low lignin levels without negatively impacting biomass yield. Conversely, the combination of 4-HBA accumulation and the BMR trait led to yield losses relative to the unmodified BMR and reduced 4-HBA titers under certain growth conditions. While this research demonstrates that stacking low lignin with coproduct accumulation in sorghum is feasible, further investigation into the specific cultivation conditions of the modified crops remains necessary to optimize biomass yields and coproduct titers.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12155-026-11065-5.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149234428","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Biochar for Low-Carbon Energy Crop Systems: Bibliometric Trends, Agronomic Evidence, and Soil Carbon Sequestration Pathways from 2007 to 2025","authors":"Larissa Fernandes da Silva,&nbsp;Pedro Lucas Nogueira de Freitas,&nbsp;Darliane Cristina Soares de Souza,&nbsp;Juciane Vieira de Assis Freire,&nbsp;Rafael Leandro Fernandes Melo,&nbsp;Rafael Oliveira Batista,&nbsp;Daniel Valadão Silva,&nbsp;Eulene Francisco da Silva,&nbsp;José Francismar de Medeiros,&nbsp;Frederico Ribeiro do Carmo","doi":"10.1007/s12155-026-11060-w","DOIUrl":"10.1007/s12155-026-11060-w","url":null,"abstract":"<div><p>This bibliometric and critical review examines the evolution of scientific research on biochar application in energy-crop systems, emphasizing biomass productivity, soil quality, and soil carbon sequestration from 2007 to 2025. The bibliometric assessment comprised 409 records retrieved from the Web of Science Core Collection and integrated publication trends, thematic evolution, scientific collaboration networks, and agronomic and environmental evidence. Scientific production increased markedly during the period, despite interannual variability, accompanied by a shift from biochar production and physicochemical characterization toward field-scale agronomic performance, soil–biochar interactions, pyrogenic carbon persistence, life-cycle assessment, greenhouse gas mitigation, and engineered biochars. Physicochemical characterization nevertheless remained essential for interpreting biochar functionality. Field evidence indicates that crop responses depend on feedstock origin, pyrolysis conditions, biochar properties, application rate, soil characteristics, crop species, and experimental duration. Long-term studies and assessments of pyrogenic carbon stability support the potential of biochar to increase soil carbon stocks and contribute to durable carbon sequestration, although the magnitude and permanence of these effects vary across pedoclimatic conditions and management systems. Major research gaps include limited standardization of biochar characterization, insufficient long-term field validation under tropical conditions, incomplete evaluation of the environmental safety of modified biochars, and the absence of harmonized indicators integrating biomass productivity, soil carbon dynamics, greenhouse gas emissions, and carbon permanence. Overall, current evidence supports biochar as a soil amendment and carbon-management strategy for low-carbon bioenergy systems when material properties and application practices are aligned with site-specific agronomic constraints and validated under representative field conditions.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12155-026-11060-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149189524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Empirical Evaluation of Crop Residue Energy Potential and CHP Feasibility in Ilam, Iran","authors":"Amir Azizpanah,&nbsp;Morteza Taki","doi":"10.1007/s12155-026-11064-6","DOIUrl":"10.1007/s12155-026-11064-6","url":null,"abstract":"<div><p>The increasing depletion of fossil fuel resources and the growing environmental pollution associated with their utilization highlight the urgent necessity of transitioning toward clean and sustainable energy systems. Among renewable sources, biomass is considered a promising alternative due to its ability to simultaneously generate electricity and heat through Combined Heat and Power (CHP) technologies. In this context, agricultural residues, as abundant and underutilized biomass resources, offer considerable potential for bioenergy production. This study aims to assess the bioenergy potential of field and orchard crop residues in Ilam Province, Iran. The results indicate that Ilam Province possesses substantial potential for biomass energy generation, primarily due to its diverse agricultural production and large residue volumes. Based on crop yield data, wheat, barley and watermelon were identified as the major field crops, while grape, pomegranate, and olive represented the main orchard crops contributing to biomass availability and energy generation. The theoretical biomass potential from field and orchard residues was estimated at 719,190 tons, corresponding to 11,867,588 GJ of theoretical and 2,142,754 GJ of recoverable energy potential. CHP analysis demonstrated that these residues could annually produce approximately 232,963 MWh of electricity and 272,975 MWh of heat. The estimated gross Greenhouse Gas (GHG) emissions associated with bioenergy production were about 121,214 tons of CO₂ and 121,361 tons CO₂-eq per year. When compared against fossil fuel baselines, net CO₂ reduction ranges from approximately 62,163 to 96,255 tons annually for field crop residues. The findings reveal that Ilam Province, owing to its favorable climatic conditions, extensive cultivation area, and substantial agricultural residue production, holds a strong potential for the development of biomass-to-energy technologies and can play a vital role in advancing regional sustainable energy strategies.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149132958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holistic Assessment of Sewage Sludge Co-digestion With Glycerol: Process Performance, Priming Effect, and Microbial Dynamics","authors":"Marco Wehner,&nbsp;Katharina Nussbaumer,&nbsp;Christian Ebner,&nbsp;Lea Rittmeier,&nbsp;Dirk Benndorf,&nbsp;Andreas Otto Wagner,&nbsp;Heribert Insam,&nbsp;Sabine Marie Podmirseg,&nbsp;Anke Bockreis,&nbsp;Sebastian Hupfauf","doi":"10.1007/s12155-026-11056-6","DOIUrl":"10.1007/s12155-026-11056-6","url":null,"abstract":"<div><p>Mono-digestion of sewage sludge (SS) is limited due to low C/N ratios, a low organic matter content and poor biodegradability of the organic fraction. Several studies recommend its co-digestion with crude glycerol (CG), a by-product of biodiesel production, to overcome these limitations. As previous studies primarily focused on process performance, this study aimed to conduct in-depth investigations into the co-digestion of SS with glycerol, combining microbial, biochemical, and process-related aspects, with a focus on the potential priming effect induced by glycerol. To avoid cross-effects, the co-digestion of SS with pure glycerol (PG) instead of CG was investigated at concentrations from 0% to 35% based on chemical oxygen demand (COD). Co-digestion with 35% PG increased methane yield by up to 148% compared to the control. Additionally, the reaction kinetics improved, with production rates reaching 85 mL h⁻¹ at 20% PG compared to 49 mL h⁻¹ in the control, enabling more targeted and demand-oriented biogas production. The lag phase was also reduced by 80%. However, no priming effects were observed. At higher PG concentrations (≥ 10%), COD degradation of PG was incomplete, while at lower concentrations (≤ 5%), COD was fully degraded. Further, co-digestion with PG did not change the dewatering properties of the digestate. PG altered microbial diversity and evenness without affecting richness, though no clear patterns emerged. Metaproteomic analysis showed that higher PG concentrations boosted methanogenesis, increasing it by 87% at 35% PG compared to the control. Overall, PG co-digestion is effective for boosting methane production, and low to moderate PG loadings (&lt; 5%) are most efficient.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12155-026-11056-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149035302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Study on the Performance of Microbial Fuel Cells in Aviation oil Contaminated Soil by Different Biomass-Derived Biochar-Modified Anodes","authors":"Xindi Wang,&nbsp;Haiying Guo,&nbsp;Xiaoheng Geng,&nbsp;Cunguo Lin,&nbsp;Yulei Song,&nbsp;Xiaoyi Zhao,&nbsp;Guowei Gao,&nbsp;Binpeng Han,&nbsp;Zhen Han","doi":"10.1007/s12155-026-11062-8","DOIUrl":"10.1007/s12155-026-11062-8","url":null,"abstract":"<div><p>In this study, three kinds of high-performance biochar modified carbon felt electrodes were prepared by using peanut shell biochar (PSB), corn straw biochar (CSB) and pig manure biochar (PMB) as raw materials by solution impregnation-high temperature pyrolysis composite process, which were peanut shell biochar modified carbon felt electrode (PS-CF), corn straw biochar modified carbon felt electrode (CS-CF) and pig manure biochar modified carbon felt electrode (PM-CF). The experimental materials were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. It was confirmed that the biochar was successfully loaded and a three-dimensional porous structure was obtained. It was rich in oxygen-containing functional groups such as –OH and –COO–, and the thermal stability of the material was good, which laid a material foundation for improving the performance of microbial fuel cells (MFCs). In the MFC performance test, all modified electrodes showed better performance than unmodified carbon felt (CF). The MFC of CS-CF is particularly prominent: the start-up time is 44.9 h shorter than that of CF, the maximum output voltage reaches 153.2 mV, and the maximum power density is 11.9 mW/m³, which is 2.01 times that of CF group. At the same time, the removal rate of aviation fuel is positively correlated with the output voltage, and the removal rate of aviation fuel in the CS-CF group is the highest, reaching 26.23%. This study confirms that biochar modification can synergistically improve the electricity generation performance and pollutant degradation efficiency of MFC by optimizing the microstructure and surface chemical properties of the electrode, which provides a potential electrode material and technical path for environmental remediation applications such as aviation oil contaminated soil.</p></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Integrating the Potential of Monotheca buxifolia (Gurgure) Oil as a Sustainable Biodiesel Feedstock using Novel Heterogeneous Catalyst: Kinetics and Process Optimization","authors":"Ghazala Abid,&nbsp;Muhammad Farooq,&nbsp;Anita Ramli,&nbsp;Maheem Farid,&nbsp;Mehwish Naz,&nbsp;Shagufta Saeed,&nbsp;Muhammad Noman,&nbsp;Mudassir Iqbal,&nbsp;Ghayas Ul Islam","doi":"10.1007/s12155-026-11063-7","DOIUrl":"10.1007/s12155-026-11063-7","url":null,"abstract":"<div><p>This study reports the one-step biodiesel production from low-cost, non-edible gurgure (Monotheca buxifolia) seed oil using a novel Na₂O/CoMn₂O₄ heterogeneous base catalyst. The thermal stabilty, crystalinity, morphology, elemental composition, textural properties and basicity of the design catalyst were comprehensively studied using thermogravimetric analysis (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Brunauer–Emmett–Teller (BET) surface area analysis and acid-base titration. The characterization results revealed that the CoMn₂O₄ support possesed a uniform hierarchical texture, which subsequently transformed into a spongy morphology after Na₂O incorporation. The catalytic activity evaluation results signified that the synthesized Na2O/CoMn2O4 catalyst possessed good transesterification activity in the selected oil. Among them, the catalyst with 30wt% Na2O contents possessed high catalytic activity, providing a maximum yield of 95% biodiesel at 70 °C reaction temperature, 1:14 oil-to-methanol molar ratio, 8wt% catalyst loading in 350 rpm stirring speed, and reaction time of 2 h. The results are aligned with the response surface methodology (RSM) based on central composite design (CCD) producing p-value of 0.000 (high level of significance). The kinetic studies indicated that the reaction follows pseudo-first-order kinetics, acquiring an activation energy of 31 kJ mol⁻¹. The catalyst also demonstrated excellent chemical stability and reusability over seven consecutive cycles. Additionally, the produced biodiesel was in accordance to ASTM and EN quality standards, underscoring its potential as a sustainable and viable alternative fuel.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":487,"journal":{"name":"BioEnergy Research","volume":"19 1","pages":""},"PeriodicalIF":3.3,"publicationDate":"2026-09-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149034691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}