Journal ArticleDOI
Hydrolysis of Cellulose by Amorphous Carbon Bearing SO3H, COOH, and OH Groups
Satoshi Suganuma,Kiyotaka Nakajima,Masaaki Kitano,Daizo Yamaguchi,Hideki Kato,Shigenobu Hayashi,Michikazu Hara +6 more
TLDR
The carbon catalyst can be readily separated from the saccharide solution after reaction for reuse in the reaction without loss of activity, and the catalytic performance of the carbon catalyst is attributed to the ability of the material to adsorb beta-1,4 glucan, which does not adsorb to other solid acids.Abstract:
The hydrolysis of cellulose into saccharides using a range of solid catalysts is investigated for potential application in the environmentally benign saccharification of cellulose. Crystalline pure cellulose is not hydrolyzed by conventional strong solid Bronsted acid catalysts such as niobic acid, H-mordenite, Nafion and Amberlyst-15, whereas amorphous carbon bearing SO 3H, COOH, and OH function as an efficient catalyst for the reaction. The apparent activation energy for the hydrolysis of cellulose into glucose using the carbon catalyst is estimated to be 110 kJ mol (-1), smaller than that for sulfuric acid under optimal conditions (170 kJ mol (-1)). The carbon catalyst can be readily separated from the saccharide solution after reaction for reuse in the reaction without loss of activity. The catalytic performance of the carbon catalyst is attributed to the ability of the material to adsorb beta-1,4 glucan, which does not adsorb to other solid acids.read more
Citations
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Journal ArticleDOI
Selective hydrogenation of butyl levulinate to γ-valerolactone over sulfonated activated carbon-supported SnRuB bifunctional catalysts
TL;DR: The sulfonated activated carbon (SAC) supported SnRuB catalyst was developed through the co-impregnation followed by a chemical reduction process and applied for BL hydrogenation to GVL for the first time as mentioned in this paper .
Journal ArticleDOI
Selective production of value-added chemicals from cellulosic biomass waste via plasma-synthesized catalysts
TL;DR: In this paper , a novel process for synthesis of carbon acid catalyst bearing oxygenated groups is proposed based on plasma engineering, where carbon nanoparticles are synthesized with in-situ surface acid modification in a one-pot plasma process with a mixture of carbon precursor and sulfuric acid.
Book ChapterDOI
Applications in catalysis
Simona Bennici,Claire Courson +1 more
TL;DR: In this paper, the dependence of catalytic performances on various reactions to the physicochemical properties of char-based catalysts and to identify the required characteristics indispensable for the future of chars' development in the heterogeneous catalysis field is discussed.
Journal ArticleDOI
Preparation of cyclodextrin-based carbonaceous catalyst and its application in the esterification
Chun Shan,Guangren Qian +1 more
TL;DR: In this article, a new carbonaceous catalyst with sulfonic acid group (-SO3H) was prepared by incomplete carbonization of β-cyclodextrin followed by sulfonation.
Journal ArticleDOI
Transformation of cellulosic saccharides into alkyl glucosides catalyzed by bifunctional ionic liquids
Han Cheng Zhou,Bin Wang,Xin Feng Guo,Xinyi Zhang,Xiao Hong Wei,Cheng Peng,Douglas R. MacFarlane,Youzhu Yuan +7 more
TL;DR: Three kinds of hydrophobic/acidic bifunctional ionic liquids were synthesized and utilized as catalysts for the conversion of cellulosic saccharides into alkyl glucosides, which exhibit a high catalytic conversion for cellobiose and cellulose with a low degree of crystallinity.
References
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Journal ArticleDOI
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Andrea C. Ferrari,John Robertson +1 more
TL;DR: In this paper, a model and theoretical understanding of the Raman spectra in disordered and amorphous carbon is given, and the nature of the G and D vibration modes in graphite is analyzed in terms of the resonant excitation of \ensuremath{\pi} states and the long-range polarizability of the long range bonding.
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Journal ArticleDOI
The path forward for biofuels and biomaterials
Arthur J. Ragauskas,Charlotte K. Williams,Brian H. Davison,George J. P. Britovsek,John Cairney,Charles A. Eckert,William J. Frederick,Jason P. Hallett,David J. Leak,Charles L. Liotta,Jonathan R. Mielenz,Richard J. Murphy,Richard H. Templer,Timothy J. Tschaplinski +13 more
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Journal ArticleDOI
Toward an aggregated understanding of enzymatic hydrolysis of cellulose: noncomplexed cellulase systems.
TL;DR: It is suggested that it is timely to revisit and reinvigorate functional modeling of cellulose hydrolysis and that this would be highly beneficial if not necessary in order to bring to bear the large volume of information available on cellulase components on the primary applications that motivate interest in the subject.
Journal ArticleDOI
Bio-ethanol--the fuel of tomorrow from the residues of today.
TL;DR: This review gives an overview of the new technologies required and the advances achieved in recent years to bring lignocellulosic ethanol towards industrial production.