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
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Production of 5-HMF from Cellulosic Biomass: Experimental Results and Integrated Process Simulation
Michael Alexandros Kougioumtzis,Asimina A. Marianou,Konstantinos Atsonios,Chrysoula M. Michailof,Nikos Nikolopoulos,N. Koukouzas,Kostas S. Triantafyllidis,Angelos A. Lappas,Emmanuel Kakaras +8 more
TL;DR: In this paper, a two-step synthesis of 5-hydroxymethylfurfural (5-HMF) from biomass is presented, starting from hemicellulose-free biomass, the first step includes the hydrolysis of cellulose towards glucose in the presence of H2SO4 as catalyst, while in the second step glucose is dehydrated to 5-HF with the aid of Sn20/γ-Αl2O3 catalyst.
Journal ArticleDOI
Synergy of Vicinal Oxygenated Groups of Catalysts for Hydrolysis of Cellulosic Molecules
TL;DR: In this article, the authors demonstrate that salicylic acid and phthalic acid show higher activity than other substituted benzoic acids as models of catalytic sites on carbons in the hydrolysis of cellobiose and cellulose.
Journal ArticleDOI
Hydrolysis of biomass using a reusable solid carbon acid catalyst and fermentation of the catalytic hydrolysate to ethanol.
Mandavi Goswami,S. Meena,S. Navatha,K. N. Prasanna Rani,Ashok Pandey,Rajeev K. Sukumaran,Rachapudi B. N. Prasad,B.L.A. Prabhavathi Devi +7 more
TL;DR: Results indicate the solid acid catalyst as an interesting option for biomass hydrolysis as it can hydrolyze cellulose with lower reaction times and are easy to recover and reuse.
Journal ArticleDOI
Hydrothermal Preparation and Characterization of Novel Corncob-Derived Solid Acid Catalysts
TL;DR: The corncob-derived catalyst synthesized under optimized conditions exhibited higher catalytic activity in esterification reactions, yielding nearly 90% methyl oleate in only 2 h.
Journal ArticleDOI
Pervaporation dehydration performance of microporous carbon membranes prepared from resorcinol/formaldehyde polymer
TL;DR: Microporous carbon membranes for pervaporation applications were prepared on a porous α-alumina support by a partially carbonization of a resorcinol/formaldehyde resin this article.
References
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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.