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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Catalytic hydrolysis of cellulose by phosphotungstic acid-supported functionalized metal-organic frameworks with different electronegative groups.
TL;DR: It is found that strong electronegative groups can selectively adsorb cellulose by hydrogen bonds, and the grafted –NO2 catalyst PTA@MIL-101–NO2 obtained the highest glucose yield of 16.2% in the cellulose-directed hydrolysis.
Journal ArticleDOI
One-pot Synthesis of Furfural from Xylose using Al2O3–Ni-Al Layered Double Hydroxide Acid-Base Bi-functional Catalyst and Sulfonated Resin
TL;DR: Furfural was synthesized from xylose in a one-pot manner by the combined use of Ni2+-modified γ-Al2O3 (Al 2O3-Ni-Al layered double hydroxide (LDH)) and a sulfonated resin (Amberlyst-15).
Journal ArticleDOI
Hydroxyl radicals-mediated oxidative cleavage of the glycosidic bond in cellobiose by copper catalysts and its application to low-temperature depolymerization of cellulose
Fangwei Gu,Haichao Liu +1 more
TL;DR: The results demonstrate the effectiveness of this new method in the oxidative cleavage of glycosidic bonds, and its viability for the efficient depolymerization of cellulose at low temperatures, which can be further improved by exploring new free radicals and optimizing their reactivity and selectivity.
Journal ArticleDOI
Characterization of persimmon fruit peel and its biochar for removal of methylene blue from aqueous solutions: thermodynamic, kinetic and isotherm studies
Ayten Ates,Tülay Oymak +1 more
TL;DR: The PFP showed an efficient removal efficiency for removal of MB in tap water, seawater, and river water, and the high MB biosorption capacity of PFP can be a promising alternative for cationic dye removal at neutral pH.
Journal ArticleDOI
Immobilization of –OSO3H on activated carbon powder and its use as a heterogeneous catalyst in the synthesis of phthalazine and quinoline derivatives
TL;DR: In this paper , the authors evaluated the efficiency of fabricated activated carbon-OSO3H catalyst in synthesizing 1H-indazolo[1,2-b]phthalazine-trione and quinolines derivatives through a one-pot multicomponent reaction under solvent-free conditions.
References
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Journal ArticleDOI
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