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
More filters
Journal ArticleDOI
Acid functionalized, highly dispersed carbonaceous spheres: an effective solid acid for hydrolysis of polysaccharides
TL;DR: In this article, high-dispersible carbonaceous spheres with sulfonic acid groups were successfully prepared from glucose by hydrothermal method Transmission electron microscopy (TEM) showed the as-synthesized carbonaceous materials were uniform, spherical in shape with an average diameter of about 450nm Fourier transform infrared (FT-IR) proved that SO3H, COOH, OH groups were grafted on the surface of the carbonaceous sphere during the sulfonation.
Journal ArticleDOI
Catalytic Performance of Biomass Carbon-Based Solid Acid Catalyst for Esterification of Free Fatty Acids in Waste Cooking Oil
TL;DR: A series of carbon-based solid acid catalysts were prepared from bagasse using a carbonization-sulfonation method and employed to catalyze esterification of oil with methanol to produce biodiesel as discussed by the authors.
Journal ArticleDOI
Heterogeneous hydrolysis of cellulose into glucose over phenolic residue-derived solid acid
TL;DR: In this paper, a carbon-based solid acid (CSA) was successfully prepared using phenolic residue as starting material, and the characterization results indicate that such solid acid catalyst mainly consists of four building blocks: the condensed aromatic carbon sheets, the active groups (including SO3H, COOH and phenolic OH), the side chains (including CH3 and OCH3) and the bridge linkages (including O, CH2, CH2 CH2, and O CH2 ) acting as the intermediates between aromatic clusters.
Journal ArticleDOI
Bionanowhiskers from jute: Preparation and characterization
TL;DR: Acid hydrolysis increased crystallinity, but decreased the temperature corresponding to major degradation and onset of degradation and these bionanowhiskers might be useful as reinforcing element in nanocomposites.
Journal ArticleDOI
Preparation of water-soluble hyperbranched polyester nanoparticles with sulfonic acid functional groups and their micelles behavior, anticoagulant effect and cytotoxicity.
Qiaorong Han,Xiaohan Chen,Yanlian Niu,Bo Zhao,Bingxiang Wang,Chun Mao,Libin Chen,Jian Shen,Jian Shen +8 more
TL;DR: The results confirmed that the sulfonic acid terminal groups can substantially enhance the anticoagulant property of HBPE, and the HBPE-SO3 NPs have the potential to be used in nanomedicine due to their good bioproperties.
References
More filters
Journal ArticleDOI
Interpretation of Raman spectra of disordered and amorphous carbon
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.
Book
Spectrometric identification of organic compounds
TL;DR: In this paper, a sequence of procedures for identifying an unknown organic liquid using mass, NMR, IR, and UV spectroscopy is presented, along with specific examples of unknowns and their spectra.
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
TL;DR: The integration of agroenergy crops and biorefinery manufacturing technologies offers the potential for the development of sustainable biopower and biomaterials that will lead to a new manufacturing paradigm.
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.