Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 5, Issue 5, Pages 6889-6894Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee03373a
Keywords
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Funding
- USDA [Wis01183]
- NSF [CBET-0847049]
- Div Of Chem, Bioeng, Env, & Transp Sys
- Directorate For Engineering [0847049] Funding Source: National Science Foundation
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A novel cellulase-mimetic solid catalyst, sulfonated chloromethyl polystyrene resin (CP-SO3H), containing cellulose-binding sites (-Cl) and catalytic sites (-SO3H) was synthesized for hydrolyzing cellulose. Cellobiose could be completely hydrolyzed in 2-4 hours at 100-120 degrees C by CP-SO3H, and microcrystalline cellulose (Avicel) could be hydrolyzed into glucose with a yield of 93% within 10 hours at moderate temperature (120 degrees C). The apparent activation energies for the hydrolysis of cellobiose and Avicel with CP-SO3H were approximately 78 and 83 kJ mol(-1), respectively, which are much lower than those for the hydrolysis of cellobiose and cellulose with sulfuric acid (133 and 170 kJ mol(-1), respectively) but higher than that with cellulase (3-50 kJ mol(-1)). Low activation energy allows the CP-SO3H-catalyzed hydrolysis to proceed at low temperature, which reduces energy consumption and avoids undesirable sugar degradation. The low activation energy of CP-SO3H might be attributed to its ability to adsorb/attract cellobiose and cellulose and to disrupt hydrogen bonds of cellulose.
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