Article
Agricultural Engineering
Biao Zheng, Yikui Zhu, Shanhao Zheng, Yien Mo, Shaolong Sun, Junli Ren, Yuanhua Li, Aimin Wu, Huiling Li
Summary: Torrefaction is an effective method for energy recovery from biomass, and autohydrolysis pretreatment can significantly enhance the torrefaction process by improving the quality of final products and accelerating lignin degradation, resulting in an increase in G-type lignin content.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Agricultural Engineering
Dibyajyoti Haldar, Asma Musfira Shabbirahmed, Biswanath Mahanty
Summary: In this study, multivariate regression and artificial neural network (ANN) models were developed using curated experimental data to predict reducing sugar generation from lignocellulosic biomass (LCB). The results showed that acid and enzyme had a positive influence on reducing sugar generation, while treatment severity, temperature, and time had a negative influence. The genetic algorithm-optimized ANN model performed well in predicting LCB hydrolysis, with high fitness on training, validation, and test sets. Sensitivity analysis revealed that lignin and hemicellulose contents could be inhibitory factors. Although polynomial models offer simple interpretation, optimized ANN models provide better predictability for datasets with diverse biomass compositions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Qiulin Yang, Yunjing Chen, Shiyun Yu, Qingxi Hou, Ming Wu, Tongbao Jiang, Kaiqing Wang, Wei Liu
Summary: In this study, poplar wood chips were subjected to autohydrolysis pretreatment to make chemi-thermomechanical pulp (CTMP). The changes in lignin structure and bleachability of CTMP were investigated. The results showed that the contents of conjugated carbonyl and quinone groups in lignin structure were negatively correlated with CTMP bleachability, with conjugated carbonyl groups having a greater impact. This work is important for the application of autohydrolysis in poplar CTMP pulping and bleaching processes.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Multidisciplinary
Qiulu Chu, Wenyao Tong, Shufang Wu, Yongcan Jin, Jinguang Hu, Kai Song
Summary: Adding mannitol and syringic acid in dilute acid pretreatment of hardwood can alter lignin structure and properties, thus reducing lignin inhibition on cellulose hydrolysis and improving the efficiency of enzymatic saccharification of cellulose.
Article
Agricultural Engineering
Jiahui Wei, Lizhen Wang, Shengcheng Zhai, Huamin Zhai, Hao Ren
Summary: The study investigated the depolymerization and dissolution of naked oat stem cell wall in subcritical water conditions, revealing the potential of naked oat stems as raw materials for green biorefinery. Results showed that lignin and hemicellulose removal rates were highest at 190 degrees Celsius, with substantial removal achieved. This research provides insight into overcoming the resistance of lignocellulosic biomass composite cell walls to depolymerization in a single green solvent.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Agricultural Engineering
Wenchao Jia, Haiqiang Shi, Xueru Sheng, Yanzhu Guo, Pedram Fatehi, Meihong Niu
Summary: Enzymatic hydrolysis is a widely used method to convert biomass into biofuels. This study focused on the role of lignin produced during the autohydrolysis process in the enzymatic hydrolysis of biomass. The findings showed that as the hydrolysis intensity increased, the content of beta-O-4 in lignin decreased while the content of beta-5, beta-beta, and S/G ratio increased. The study also found that the phenolic content of lignin influenced the adsorption of cellulase enzyme and its activity in hydrolyzing cellulose microcrystals.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Qiang Xiong, Jie Qiao, Minghui Wang, Shuang Li, Xiujuan Li
Summary: This study investigated the effects of carboxylated and quaternized lignin (CQL) and hydroxymethylated lignin (HML) on enzymatic hydrolysis efficiency (EHE) of p-toluenesulfonic acid treated corn stover (PCS). The results showed that CQL enhanced EHE by forming CQL-I3-GL complexes with lower binding free energy, while HML decreased EHE due to overlapping binding sites with the carbohydrate binding domain of I3-GL, resulting in decreased enzyme activity. This research helps in understanding the impact of modified lignins on EHE and cellulase adsorption.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Anusuiya Singh, Rosa M. Rodriguez-Jasso, Rohit Saxena, Ruth Belmares Cerda, Reeta Rani Singhania, Hector A. Ruiz
Summary: This study investigated the impact of subcritical water pretreatment on the chemical composition, biomass fractionation, and enzymatic hydrolysis of agave bagasse from various tequila production processes. The research identified optimal conditions for the pretreatment process, resulting in increased cellulose content in the solid phase. Enzymatic hydrolysis of the pretreated agave bagasse showed promising conversion yield, indicating its potential as a raw material in second-generation biorefineries.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Abhishek S. Patri, Ramya Mohan, Yunqiao Pu, Chang G. Yoo, Arthur J. Ragauskas, Rajeev Kumar, David Kisailus, Charles M. Cai, Charles E. Wyman
Summary: The study demonstrates that Co-solvent Enhanced Lignocellulosic Fractionation (CELF) pretreatment can prevent detrimental lignin redeposition on biomass after pretreatment, improving enzymatic hydrolysis efficiency. Results show that CELF-pretreated biomass can sustain high enzyme activity over long periods with lower enzyme doses, leading to higher glucose yield compared to conventional DSA pretreatment.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Agricultural Engineering
Marcel B. Santana, Lauren B. Soares, Eduardo Zanella, Marcos Fellipe da Silva, Boris U. Stambuk, Rosana Goldbeck, Alan Ambrosi, Acacio Zielinski, Patricia Poletto, Jaciane L. Ienczak
Summary: This study evaluated the release of xylooligosaccharides (XOS) and cellooligosaccharides (COS) from tobacco stem through hydrothermal pretreatments. The highest yield of XOS was obtained at 190°C and 2.93% solid load, with 96% w[XOS]/w[xylan]. The highest content of COS and total oligomers (COS + XOS) was achieved at 190°C and 17.07% solid load, with values of 6.42 g/L and 17.7 g/L, respectively. The mass balance predicted 132 kg of XOS (X2-X6) from 1000 kg of tobacco stem under the optimal condition.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Mohan Li, Yufeng Yuan, Yangsu Zhu, Bo Jiang, Wenjuan Wu, Shufang Wu, Yongcan Jin
Summary: The addition of sulfomethylated lignins in enzymatic hydrolysis significantly improved substrate digestibility and sugar yield. Competitive adsorption between cellulase, substrate lignin, and SLs was suggested as a mechanism for the observed effects.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Ruchi Agrawal, Amit Verma, Reeta Rani Singhania, Sunita Varjani, Cheng Di Dong, Anil Kumar Patel
Summary: Biorefining of lignocellulosic biomass has the potential to reduce greenhouse gas emissions, but releasing fermentable sugars is a commercialization challenge. Inhibition factors during enzymatic hydrolysis include physio-chemical factors, water-soluble and -insoluble enzyme inhibitors, as well as oligomers and enzyme-lignin binding.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Xiaohui Guo, Yingjuan Fu, Fengshan Zhang, Xiaoliang Li, Na Liu
Summary: Autohydrolysis of wood chips effectively pre-extracts hemicelluloses, increasing the porosity and hydrophilicity of the wood chips for better accessibility of remaining components to alkali solution.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Multidisciplinary
P. Jennita Jacqueline, G. Velvizhi
Summary: This study examines the potential of yellow banana peel, pineapple peel, and papaya peel as substrates for producing reducing sugar. Different pretreatment techniques were used to enhance the delignification process and enzymatic hydrolysis, resulting in increased yield of reducing sugars.
SUSTAINABLE CHEMISTRY AND PHARMACY
(2024)
Article
Chemistry, Multidisciplinary
Jikun Xu, Pengfei Zhou, Xinyan Liu, Lan Yuan, Chuntao Zhang, Lin Dai
Summary: This study presents a stepwise approach for hierarchically extracting hemicelluloses and lignin from poplar, while obtaining a cellulose-rich substrate. By breaking down amorphous portions and robust cell walls, enzymatic digestibility was significantly enhanced.
Review
Biotechnology & Applied Microbiology
Simone Brethauer, Robert L. Shahab, Michael H. Studer
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2020)
Review
Biochemical Research Methods
Robert L. Shahab, Simone Brethauer, Jeremy S. Luterbacher, Michael H. Studer
CURRENT OPINION IN BIOTECHNOLOGY
(2020)
Article
Energy & Fuels
Simone Brethauer, Andrzej Antczak, Robert Balan, Tomasz Zielenkiewicz, Michael H. Studer
Article
Energy & Fuels
Robert Balan, Andrzej Antczak, Simone Brethauer, Tomasz Zielenkiewicz, Michael H. Studer
Article
Multidisciplinary Sciences
Robert L. Shahab, Simone Brethauer, Matthew P. Davey, Alison G. Smith, Silvia Vignolini, Jeremy S. Luterbacher, Michael H. Studer
Article
Chemistry, Applied
Qixian Xie, Gaston O. Larrazabal, Ming Mab, Ib Chorkendorff, Brian Seger, Jingshan Luo
Summary: In this study, composition tunable Cu-In hydroxides were fabricated, and the composition effect on the selectivity of CO2 reduction products was investigated. It was found that increasing In content in the electrocatalysts shifted the selectivity from CO to formate. Furthermore, Cu-rich electrocatalysts mainly produced CO, while In-rich electrocatalysts selectively produced formate with high Faradaic efficiencies.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Gaston O. Larrazabal, Valery Okatenko, Ib Chorkendorff, Raffaella Buonsanti, Brian Seger
Summary: This study assessed the performance of highly uniform copper nanocubes loaded onto gas diffusion electrodes in the electrochemical CO2 reduction. The results showed that the nanocubes maintained high selectivity towards ethylene at high current densities, with partial current densities towards propylene also observed. However, the performance at high current densities was significantly influenced by electrode flooding.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Carlos A. Giron Rodriguez, Bjort Oladottir Joensen, Asger Barkholt Moss, Gaston O. Larrazabal, Daniel K. Whelligan, Brian Seger, John R. . Varcoe, Terry R. Willson
Summary: The performance of zero-gap CO2 electrolysis (CO2E) depends on the membrane's chemical structure and physical properties. Radiation-grafted anion-exchange membranes (RG-AEM) show high ionic conductivity and durability, making them a promising alternative for CO2E. The thinner 25μm-based AEM with the MPIP-headgroup provided better CO2E efficiency in terms of lower cell potentials, high CO selectivity, reduced liquid product crossover, and enhanced water management.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Johan C. Ehlers, Anders A. Feidenhans'l, Kasper T. Therkildsen, Gaston O. Larrazabal
Summary: Hydrogen is set to play a crucial role in the energy transition by decarbonizing difficult-to-electrify sectors and facilitating the storage, transportation, and trading of renewable energy. Forecasts indicate a significant increase in global water electrolysis capacity by 2030. Various electrolysis technologies are expected to coexist in the market, each targeted at specific applications and regions. The main challenge faced is reducing the production cost of hydrogen, for which energy efficiency is a major factor. This Perspective aims to dispel misconceptions about outdated designs and highlights key research needs to encourage advancements in overlooked areas for gigawatt-scale production of green hydrogen in the near future.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Gaston O. Larrazabal, Ming Ma, Brian Seger
Summary: As electrochemical CO2 reduction studies progress towards higher current densities, the system becomes more complex, requiring rigorous scientific analysis, mass transfer optimizations, and comprehensive parameter monitoring to accurately assess performance.
ACCOUNTS OF MATERIALS RESEARCH
(2021)
Article
Chemistry, Multidisciplinary
Xuemei Liu, Chaonan Cui, Shuoshuo Wei, Jinyu Han, Xinli Zhu, Qingfeng Ge, Hua Wang
Summary: This study presents a new strategy for designing efficient photocatalysts that can convert CO2 into hydrocarbons by utilizing synergistic catalytic sites. The findings provide a solution for the selective photocatalytic reduction of CO2 to CH4.
Article
Chemistry, Multidisciplinary
Chengxian Hu, Dan Wang, Lu Wang, Ying Fu, Zhengyin Du
Summary: A novel one-pot, three-component reaction conducted under electrochemical conditions was studied. The reaction involved 2-aminothiophenols, aldehydes, and malononitrile, using TBABF4 as an electrolyte and CuI as a catalyst. The proposed reaction mechanism suggested that CuI served as an electron relay. This method offers simplified operation, high atom economy, and mild reaction conditions.
Article
Chemistry, Multidisciplinary
Zhi Yang, Yu Chen, Linxi Wan, Yuxiao Li, Dan Chen, Jianlin Tao, Pei Tang, Fen-Er Chen
Summary: A highly enantioselective method for the complete hydrogenation of pyrimidinium salts using Ir/(S,S)-f-Binaphane complex as the catalyst was developed. This method provides easy access to fully saturated chiral hexahydropyrimidines, which are prevalent in many bioactive molecules. The reactions exhibit high yields and enantioselectivities under mild reaction conditions without additives. Successful application of this methodology in a continuous flow fashion further extends its practical utility.
Article
Chemistry, Multidisciplinary
Tina Jeoh, Jennifer Danger Nill, Wujun Zhao, Sankar Raju Narayanasamy, Liang Chen, Hoi-Ying N. Holman
Summary: In this study, the enzymatic hydrolysis of cellulose was investigated using real-time infrared spectromicroscopy. The spatial heterogeneity of cellulose was found to impact the hydrolysis kinetics. Hydration affected cellulose ordering, and Cel7A preferentially removed less extensively hydrogen bonded cellulose.
Article
Chemistry, Multidisciplinary
Tiphaine Richard, Walid Abdallah, Xavier Trivelli, Mathieu Sauthier, Clement Dumont
Summary: An effective method of grafting functionalities onto lignin based on glycerol carbonate has been developed using an efficient nickel-catalysed telomerisation reaction. This method allows lignin to have new reactive functions and reduces the glass transition temperatures of modified lignins, thereby expanding the application range of lignin-based resins.
Article
Chemistry, Multidisciplinary
Jing Qi, Xiyan Wang, Gan Wang, Srinivas Reddy Dubbaka, Patrick ONeill, Hwee Ting Ang, Jie Wu
Summary: This study presents a green and environmentally friendly approach for the synthesis of imides using electrocatalytic oxidation with H2O as the oxygen source. The method eliminates the need for toxic or expensive oxidants and achieves high yields under mild reaction conditions. It shows broad substrate compatibility and potential for industrial applications.
Article
Chemistry, Multidisciplinary
Babasaheb Sopan Gore, Lin-Wei Pan, Jun-Hao Lin, Yi-Chi Luo, Jeh-Jeng Wang
Summary: Here, we report a visible light-promoted intramolecular radical cascade reaction for the construction of fluorenol and naphthalene-fused cyclopropyl carbaldehyde derivatives. This method offers mild reaction conditions, a broad substrate scope, excellent step efficiency, and scalability, without the need for external chemical oxidants. The novelty of this protocol was demonstrated by synthesizing chrysene analogs and performing late-stage functionalizations.
Article
Chemistry, Multidisciplinary
Juho Antti Sirvio, Idamaria Romakkaniemi, Juha Ahola, Svitlana Filonenko, Juha P. Heiskanen, Ari Ammala
Summary: This article discusses the method of using supramolecular interaction between an aromatic hydrogen bond donor and lignin to achieve rapid delignification of softwood at low temperatures.
Article
Chemistry, Multidisciplinary
Yunyan Meng, Chunxiang Pan, Na Liu, Hongjiang Li, Zixiu Liu, Yao Deng, Zixiang Wei, Jianbin Xu, Baomin Fan
Summary: A novel visible light-driven synthesis method for 2,3-diamines has been developed, which has mild conditions, avoids the use of metal reagents, and can synthesize diamines and diols in one pot.
Article
Chemistry, Multidisciplinary
Mingqing Huang, Haiyang Huang, Mengyao You, Xinxin Zhang, Longgen Sun, Chao Chen, Zhichao Mei, Ruchun Yang, Qiang Xiao
Summary: A direct air-oxidized strategy for the synthesis of benzo[b]phosphole oxides was developed in this study. Arylphosphine oxides were transformed into phosphinoyl radicals, which were further combined with various alkynes to achieve the desired products. DFT calculations revealed the mechanism of phosphinoyl radical formation.
Article
Chemistry, Multidisciplinary
Anwei Wang, Jiayin Huang, Chunsheng Zhao, Yu Fan, Junfeng Qian, Qun Chen, Mingyang He, Weiyou Zhou
Summary: This study demonstrates an innovative strategy for the aerobic oxidation of C(sp(3))-H bonds using gamma-valerolactone. By optimizing the reaction conditions and utilizing specific catalysts, efficient oxidation of C(sp(3))-H bonds is achieved with good chemoselectivity in certain cases.
Article
Chemistry, Multidisciplinary
Shun Li, Likai Tong, Zhijian Peng, Bo Zhang, Xiuli Fu
Summary: Sulfide compounds show promise as electrocatalysts for water splitting, but their performance is limited by factors such as limited active sites and hindered substance transport. This study successfully prepared a high-entropy sulfide (ZnCoMnFeAlMg)(9)S-8, which reduced grain size and increased specific surface area, enabling the realization of a dual-functional catalyst with multiple catalytic sites. High entropy also modulated the electronic properties of sulfides, reducing the potential energy barrier for hydrolysis. This research introduces a new approach for functionalizing high entropy nanomaterials and improves the performance of water splitting catalysts.
