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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Mesoporous Molybdenum-Tungsten Mixed Metal Oxide: A Solid Acid Catalyst for Green, Highly Efficient sp3-sp2 C-C Coupling Reactions.
Wimalika R.K. Thalgaspitiya,Tharindu Kankanam Kapuge,Junkai He,Dinithi Rathnayake,Peter Kerns,Steven L. Suib +5 more
TL;DR: The weak/moderate acidic sites present in the mixed metal oxide resulted in excellent catalytic properties towards the sp3-sp2 carbon-carbon coupling reactions and the coupling of benzyl alcohol and toluene was completed within 15 minutes at 110°C with 99% yield.
Journal ArticleDOI
Hydrolysis of crystalline cellulose to glucose in an autoclave containing both gaseous and liquid water
TL;DR: In this paper, the authors investigated the role of water vapor in the β-1,4-glycosidic bonds of cellulose and showed that water vapor plays an important role in the degradation of produced glucose under hydrothermal conditions.
Journal ArticleDOI
Pyrolysis of polypropylene waste using sulfonated carbon catalyst synthesized from sugarcane bagasse
TL;DR: In this paper, the authors investigated thermal and catalytic pyrolysis of polypropylene waste (PP) using a batch reactor in the temperature range 400-460°C.
Journal ArticleDOI
Cellulose hydrolysis catalysed by mesoporous activated carbons functionalized under mild conditions
TL;DR: In this article, a mesoporous commercial carbon of trade name SA-30, abbreviated as SA in this work, has been chemically treated at room temperature to create acidic surface oxygen functional groups.
Journal ArticleDOI
Preparation of Sulfo-Group-Bearing Mesoporous-Silica-Based Solid Acid Catalyst and Its Application to Direct Saccharification
TL;DR: In this paper, a series of sulfo-group-bearing mesoporous silica (SBA-15) catalysts were prepared using a one-step hydrothermal synthesis method.
References
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Journal ArticleDOI
The path forward for biofuels and biomaterials
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Journal ArticleDOI
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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.