Article
Biochemistry & Molecular Biology
Xiaoqi Wang, Mo Qiu, Yiwei Tang, Jirui Yang, Feng Shen, Xinhua Qi, Yingliang Yu
Summary: By synthesizing sulfonated lignin-derived ordered mesoporous carbon solid acid using the EISA method, a high xylose conversion rate and furfural yield were achieved. The catalyst showed excellent stability and reusability, making it suitable for catalytic conversion of xylan.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Physical
Yasnina Olivares, Carla Herrera, Juan Seguel, Catherine Sepulveda, Carolina Parra, Gina Pecchi
Summary: An MCM-41-SO3H catalyst with a sulfonic process was successfully synthesized and characterized for furfural production from xylose and hemicellulose. The catalytic performance was evaluated using different n-butanol/water ratios as dissolvent, and a proper ratio enhanced substrate solubility and prevented deactivation of the catalyst. Recycling evaluation tests showed that the yield of furfural was closer to the fresh catalyst when the recovered catalyst underwent a sulfonation process.
Article
Engineering, Environmental
Carmen Padilla-Rascon, Juan Miguel Romero-Garcia, Encarnacion Ruiz, Inmaculada Romero, Eulogio Castro
Summary: The study evaluated an optimized process for obtaining furfural from olive stone, demonstrating its potential as a promising raw material for furfural production.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Energy & Fuels
Guangzhi Xu, Zhuoheng Tu, Xingbang Hu, Mian Li, Xiaomin Zhang, Youting Wu
Summary: This study employed a series of [HSO4]-based protic Bronsted acidic ionic liquids (BAILs) as green catalysts to efficiently and sustainably prepare furfural (FF) from xylose or hemicellulose. Furfural yields of 75.4% or 80.4% were achieved under optimal conditions with [Hpy][HSO4] as the catalyst, surpassing most reported ionic liquid catalysts. The chemical structures of BAILs were confirmed, and the acidity was tuned through methyl substitution on the pyridinium ring. The catalytic performance, recyclability, and low cost of [Hpy][HSO4] make it suitable for large-scale FF production.
Article
Energy & Fuels
Qi Xia, Hong Peng, Yu Zhang, Guiming Fu, Yuhuan Liu, Zhihong Xiao, Lingling Huang, Haoran Bi
Summary: Exploring an environmentally-friendly method for furfural production from bamboo hemicellulose and xylose was conducted. Results showed that adding a small amount of water enhanced the yields, and the catalyst [Bmim]HSO4 exhibited great reusability.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Chemistry, Physical
Ziyang Xu, Guangwei Zhang, Kangjun Wang
Summary: A novel carbon-based solid acid catalyst, S-800-CG, was synthesized by carbonizing calcium gluconate at high temperature and sulfonating with 4-diazoniobenzene sulfonate at room temperature. The physical and chemical properties of the catalyst were characterized by various techniques. S-800-CG was found to be an efficient catalyst for furfural production from xylose or corncob.
CATALYSIS COMMUNICATIONS
(2023)
Review
Biotechnology & Applied Microbiology
S. Bilal Jilani, Daniel G. Olson
Summary: Lignocellulosic biomass is a cheap and versatile carbon source for biofuels. Acid pretreatment is commonly used to make it available for microbial metabolism, but it also produces inhibitors that reduce productivity and increase costs. This review discusses the toxicity of furfural as a key inhibitor and metabolic strategies to increase tolerance.
MICROBIAL CELL FACTORIES
(2023)
Article
Chemistry, Multidisciplinary
Shalini Arora, Neeraj Gupta, Vasundhara Singh
Summary: In this study, valorization of hemicellulose isolated from lignocellulosic biomass to furfural was achieved through pH-controlled acid catalysis using choline-based Bronsted acidic and natural acidic deep eutectic solvents. The optimal deep eutectic solvents were found to be ChCl/p-TSA and ChCl/levulinic acid, yielding 85% furfural. The reported methodology offers advantages such as using bio-based green solvents, mild reaction conditions, and efficient scale-up of the reaction.
Article
Engineering, Environmental
Xiang Lyu, Gerardine G. Botte
Summary: The study found that in addition to the oxidation of corncobs and xylose, the formation of humins also affects the furfural yield when implementing metal chloride-based catalysts. Furthermore, analyzing the chemical properties of metal ions can help predict the catalyst's activity in furfural production.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Hyun Jin Jung, Kyeong Keun Oh
Summary: The alkaline fractionation of rice husk using NaOH can result in a hemicellulose-rich hydrolysate with a high glucan content, which is crucial for reducing enzyme dosage in enzymatic saccharification. The optimized process also allows for a high furfural production yield through acidification and heat treatment of the hydrolysate, showing potential for achieving high ethanol titers through a two-stage fed-batch fermentation process.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Physical
Derun Hua, Hao Ding, Yunfeng Liu, Jian Li, Baojun Han
Summary: The environmentally friendly catalyst and task-specific ionic liquid used in the dehydration of xylose to furfural showed promising results with high xylose conversion and furfural yield under given conditions.
Review
Biotechnology & Applied Microbiology
Juhi Sharma, Vinod Kumar, Rajendra Prasad, Naseem A. Gaur
Summary: Lignocellulosic biomass is an abundant material on earth and can be processed by microorganisms to produce biofuels. Saccharomyces cerevisiae is an ideal candidate for consolidated bio-processing (CBP) to produce cellulose-based ethanol. However, there are still challenges in the process, such as incomplete substrate catabolism and low expression of heterologous proteins.
BIOTECHNOLOGY ADVANCES
(2022)
Article
Chemistry, Physical
Guangzhi Xu, Zhuoheng Tu, Xingbang Hu, Mian Li, Xiaomin Zhang, Youting Wu
Summary: The utilization of biomass as a replacement for fossil resources in chemical synthesis is considered a crucial strategy for sustainable and environmentally-friendly chemical industry. To achieve this, the design and development of suitable catalysts for biomass conversion is of great significance. In this study, ionic buffering biphase systems (IBBSs) consisting of ionic buffering catalysts (IBCs) and an organic phase were proposed and developed for the efficient dehydration of xylose and hemicellulose to furfural (FF). The IBBSs demonstrated high FF yields and reduced use of NaCl, along with advantages such as simple preparation, thermal stability, and low cost. This work presents a new approach for the design and development of catalytic reaction-separation coupling systems for the efficient conversion of xylose and hemicellulose to FF.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Food Science & Technology
Gabriela N. Pereira, Karina Cesca, Anelise Leal Vieira Cubas, Debora de Oliveira
Summary: Non-thermal plasma technology has been extensively studied and applied as an environmentally friendly technique for the clean treatment of lignocellulosic materials. Compared to traditional chemical pre-treatments, non-thermal plasma technology can reduce environmental pollution effectively, and is expected to be an efficient pretreatment method for producing high value-added products from large quantities of residues in the future.
TRENDS IN FOOD SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Zhenjie Yu, Zhufan Zou, Ran Wang, Guangyi Li, Aiqin Wang, Yu Cong, Tao Zhang, Ning Li
Summary: Cyclopentadiene (CPD) and methylcyclopentadiene (MCPD) can be produced from xylose or extracted hemicellulose as the feedstock through a two-step bio-route. First, cyclopentanone (CPO) is obtained by selective hydrogenolysis of xylose or extracted hemicellulose over a Ru/C catalyst in an acid-free toluene/NaCl aqueous solution biphasic system. Then, CPO is converted to CPD or MCPD via cascade reactions over zinc molybdate catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Neurosciences
Jitendra Subhash Rane, Prasenjit Bhaumik, Dulal Panda
JOURNAL OF ALZHEIMERS DISEASE
(2017)
Article
Biochemistry & Molecular Biology
Vandana Mishra, Ishan Rathore, Anagha Arekar, Lakshmi Kavitha Sthanam, Huogen Xiao, Yoshiaki Kiso, Shamik Sen, Swati Patankar, Alla Gustchina, Koushi Hidaka, Alexander Wlodawer, Rickey Y. Yada, Prasenjit Bhaumik
Article
Biochemistry & Molecular Biology
Prem Prakash, Narayan S. Punekar, Prasenjit Bhaumik
JOURNAL OF BIOLOGICAL CHEMISTRY
(2018)
Article
Chemistry, Multidisciplinary
Prasenjit Bhaumik, Hao-Ju Chou, Ling-Chieh Lee, Po-Wen Chung
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2018)
Article
Biochemistry & Molecular Biology
Suman Pandey, Prashant S. Phale, Prasenjit Bhaumik
JOURNAL OF STRUCTURAL BIOLOGY
(2018)
Article
Multidisciplinary Sciences
Deepthi S. Yarramala, Prem Prakash, Dnyanesh S. Ranade, Sejal Doshi, Prasad P. Kulkarni, Prasenjit Bhaumik, Chebrolu Pulla Rao
SCIENTIFIC REPORTS
(2019)
Article
Chemistry, Physical
Tai-Wei Tzeng, Prasenjit Bhaumik, Po-Wen Chung
MOLECULAR CATALYSIS
(2019)
Article
Biochemistry & Molecular Biology
Ishan Rathore, Vandana Mishra, Chandan Patel, Huogen Xiao, Alla Gustchina, Alexander Wlodawer, Rickey Y. Yada, Prasenjit Bhaumik
Summary: Plasmodium parasites producing plasmepsins are important drug targets. Structural studies show the S-shaped dimer formation of vacuolar pro-PMs. Disruption of the Tyr-Asp loop leads to extension of the pro-mature region and activation of the enzyme under acidic conditions. The auto-activation mechanism involves cleaving of one prosegment by another to generate mature enzymes.
Article
Microbiology
Dilip C. Badgujar, Anjali Anil, Angharad E. Green, Manalee Vishnu Surve, Shilpa Madhavan, Alison Beckett, Ian A. Prior, Barsa K. Godsora, Sanket B. Patil, Prachi Kadam More, Shruti Guha Sarkar, Andrea Mitchell, Rinti Banerjee, Prashant S. Phale, Timothy J. Mitchell, Daniel R. Neill, Prasenjit Bhaumik, Anirban Banerjee
Article
Biochemistry & Molecular Biology
Pooja Kesari, Anuradha Deshmukh, Nikhil Pahelkar, Abhishek B. Suryawanshi, Ishan Rathore, Vandana Mishra, John H. Dupuis, Huogen Xiao, Alla Gustchina, Jan Abendroth, Mehdi Labaied, Rickey Y. Yada, Alexander Wlodawer, Thomas E. Edwards, Donald D. Lorimer, Prasenjit Bhaumik
Summary: Plasmodium falciparum plasmepsin X (PfPMX), an essential protein for the survival of the deadliest malaria parasite, has been identified as a potential drug target. The crystal structure of PfPMX zymogen, which contains a novel fold of its prosegment, has been determined for the first time. The study provides insights into the inactivation, maturation, and inhibition of PfPMX, which could aid in the development of potent inhibitors against similar proteases from apicomplexan parasites.
Article
Biochemistry & Molecular Biology
Barsa Kanchan Jyotshna Godsora, Prem Prakash, Narayan S. Punekar, Prasenjit Bhaumik
Summary: Glutamate dehydrogenase (GDH) catalyzes the reversible conversion between alpha-ketoglutarate (AKG) and l-glutamate, connecting carbon and nitrogen metabolism cycles in all living organisms. The enzyme's activity is regulated by both metabolites and non-metabolites, with dicarboxylic acid metabolites affecting inhibition potential. The binding of dicarboxylic acid metabolites to the active site architecture of GDH may impact inhibitory potency.
PROTEINS-STRUCTURE FUNCTION AND BIOINFORMATICS
(2022)
Article
Biochemistry & Molecular Biology
Aasna L. Parui, Vandana Mishra, Shubhankar Dutta, Prasenjit Bhaumik, Kakoli Bose
Summary: The study demonstrates the importance of PDZ domains in the multimodal activation of HtrA2 through the generation of HtrA2 variants with different numbers of PDZs and/or active-site mutations. The study proposes a hypothesis on inter-molecular allosteric cross-talk via PDZs in HtrA2. Structural and computational snapshots also support the role of PDZs in the formation of secondary structural elements and the reorganization of the N-terminal region.
Review
Biochemistry & Molecular Biology
Ishan Rathore, Vandana Mishra, Prasenjit Bhaumik
Summary: Protein Crystallography, or Macromolecular Crystallography (MX), is a rapidly advancing field that has significantly reduced the time required for solving protein structures and shifted the paradigm from static structures to dynamic macromolecular images. With the potential to impact drug design and reveal complex biological processes, MX is poised for continued growth and development in modern biology.
EMERGING TOPICS IN LIFE SCIENCES
(2021)
Article
Chemistry, Multidisciplinary
Prasenjit Bhaumik, Gourisankar Roymahapatra
JOURNAL OF THE INDIAN CHEMICAL SOCIETY
(2019)
Article
Chemistry, Physical
Prasenjit Bhaumik, Paresh Laxmikant Dhepe
Article
Chemistry, Applied
Qingyuan Zheng, Jack H. Williams, Scott Elgersma, Mick D. Mantle, Andrew J. Sederman, G. Leendert Bezemer, Constant M. Guedon, Lynn F. Gladden
Summary: In this study, a pilot-scale fixed-bed reactor compatible with NMR/MRI was developed for Fischer-Tropsch synthesis. Multiple magnetic resonance techniques were applied to quantitatively characterize different product species within catalyst pellets, providing valuable information for catalyst and reactor optimization.
Article
Chemistry, Applied
Lisa Ramisch, Sebastian Pfaff, Sabrina M. Gericke, Edvin Lundgren, Johan Zetterberg
Summary: We present a combination of optical operando techniques that allow simultaneous measurement of adsorbed species on catalyst surfaces, monitoring of surface oxide formation, and imaging of the gas phase above the catalyst surface. The experimental setup was validated by studying CO oxidation on Pd(100) at different pressures, revealing the effects of pressure on the heterogeneous catalytic reaction.
Article
Chemistry, Applied
Marta Paniagua, Gabriel Morales, Juan A. Melero, Daniel Garcia-Salgado
Summary: The influence of common impurities in levulinic acid on the catalytic performance of different acid catalysts for bio-jet fuel production was studied. It was found that furfural had the greatest detrimental effect on catalyst performance, while propyl-sulfonic acid-modified SBA-15 and sulfonic acid resin Amberlyst-70 showed good regeneration ability.
Article
Chemistry, Applied
Jesus Tapiador, Pedro Leo, Guillermo Calleja, Gisela Orcajo
Summary: This study presents a new MOF material, Zn-URJC-13, with acid and basic sites, permanent porosity, and high affinity to CO2 molecules. The Zn-URJC-13 catalyst exhibits efficient performance in CO2 cycloaddition reactions and can be reused multiple times.
Article
Chemistry, Applied
Dan Zhao, Vita A. Kondratenko, Dmitry E. Doronkin, Shanlei Han, Jan-Dierk Grunwaldt, Uwe Rodemerck, David Linke, Evgenii V. Kondratenko
Summary: This study demonstrates the potential of cheap and commercially available Zr or Ti-based supports and ZnO to serve as active and selective catalysts for propane dehydrogenation (PDH). The catalytically active species formed in situ under PDH conditions consist of isolated ZnOx. ZnOx on the surface of LaZrOx shows the highest rate of propene formation.
Article
Chemistry, Applied
Hanbyeol Kim, Jung Rae Kim, Young-Kwon Park, Jeong-Myeong Ha, Jungho Jae
Summary: In this study, metal phosphates were used as catalysts for biomass conversion to produce sustainable aromatics through DielsAlder cycloaddition reactions. The effects of synthesis method, activation method, and P/Ti molar ratio on the structure and acid properties of titanium phosphate catalysts were systematically studied. The mesoporous titanium phosphate catalyst synthesized by hydrothermal method at 180℃ for 12 h followed by ethanol refluxing at 60℃ for 24 h at a molar P/Ti ratio of 1 showed the highest surface area and acid site density.
Article
Chemistry, Applied
Yasin Khani, Sumin Pyo, Kwang-Eun Jeong, Chul-Ung Kim, Moonis Ali Khan, Byong-Hun Jeon, Kun-Yi Andrew Lin, Siyoung Q. Choi, Young-Kwon Park
Summary: A protonated form of Zeolite Socony Mobil-5 (H-ZSM-5) catalyst was synthesized through a hydrothermal method using different sources of silica. The effect of loading the catalyst with yttrium, samarium, and gadolinium on the acidic properties was investigated. Among the metal-loaded catalysts, the Sm/LHZ catalyst showed the best performance in the methanol to propylene conversion due to its high amount of weak and intermediate acid sites, while the Gd-LHZ catalyst increased the selectivity towards ethane and propane.
Article
Chemistry, Applied
Michael Franc, Ivana Cisarova, Jan Vesely
Summary: The present study investigates an enantioselective cyclization of enals with imidazolone derivatives catalyzed by a combination of achiral Pd(0) complex and chiral secondary amine. Corresponding spirocyclic imidazolones were produced in high yields with moderate diastereoselectivity and excellent enantioselectivity. The developed co-operative catalytic methodology provides a highly substituted spirocyclic scaffold with four stereogenic centers under mild conditions.
Article
Chemistry, Applied
Mauro Alvarez, Jennifer Cueto, David P. Serrano, Pablo Marin, Salvador Ordonez
Summary: This study focuses on improving the formulation and preparation methods of catalysts for the production of dimethyl carbonate. By using suitable catalyst preparation methods and copper salt precursors, the researchers successfully produced catalysts with optimal performance for dimethyl carbonate formation.
Article
Chemistry, Applied
Claudia J. Keijzer, Luc C. J. Smulders, Dennie Wezendonk, Jan Willem de Rijk, Petra E. de Jongh
Summary: This study investigates the catalytic behavior of alpha-alumina supported silver catalysts in the presence of chloride. It is found that the particle size of silver can affect the selectivity of the catalyst, but different strategies lead to different results. In this size range, the selectivity of ethylene oxide is correlated to the Ag : Al2O3 surface ratio.
Article
Chemistry, Applied
Takeshi Aihara, Wataru Aoki, Michikazu Hara, Keigo Kamata
Summary: The development of acid-base bifunctional catalysts is important for promoting specific chemical transformations. In this study, Ti-based perovskite oxides were synthesized and used as catalysts for two C-C bond-forming reactions (cyanosilylation and Knoevenagel condensation). The highly pure SrTiO3 nanoparticles with a high specific surface area exhibited the highest catalytic performance, and could be easily recovered and reused.
Article
Chemistry, Applied
Olga Gorlova, Petra Pribylova, Eliska Vyskocilova, Katerina Peroutkova, Jan Kohout, Iva Paterova
Summary: This study investigates the Baeyer-Villiger oxidation of beta-cyclocitral using tin-modified mixed oxides as catalysts. The optimal reaction conditions and the effects of various factors on the reaction course and selectivity were determined. The results show that tin-modified mixed oxides exhibit high activity and selectivity in the oxidation reaction.
Article
Chemistry, Applied
M. I. Avila, M. M. Alonso-Doncel, L. Briones, G. Gomez-Pozuelo, J. M. Escola, D. P. Serrano, A. Peral, J. A. Botas
Summary: The catalytic fast pyrolysis of lignin using ion-exchanged zeolite catalysts showed significant improvements in bio-oil quality and the production of aromatic hydrocarbons and oxygenated compounds.
Article
Chemistry, Applied
Enrico Catizzone, Giorgia Ferrarelli, Paolo Bruno, Girolamo Giordano, Massimo Migliori
Summary: The acid-catalysed alcohol conversion reaction is a promising route for de-fossilization strategies. Research on pure alcohol conversion and simultaneous dehydration of mixed alcohols have shown different product compositions, with the type and distribution of acid sites affecting the reaction mechanism.
Article
Chemistry, Applied
Alireza Ranjbari, Juho Kim, Jihee Yu, Jiyun Kim, Mireu Park, Nayoung Kim, Kristof Demeestere, Philippe M. Heynderickx
Summary: This study investigated a novel kinetic model for the adsorption and photocatalytic degradation of methyl orange using commercial ZnO and reduced ZnO photocatalysts. The results provided new insights into the interaction of catalysts with molecules of different charges and compared with a previous study on methylene blue. The presence of oxygen vacancies in ZnO and their effects on adsorption and photocatalytic degradation were analyzed, and the photocatalytic degradation rate of reduced ZnO was found to increase significantly.
