Journal
APPLIED CATALYSIS A-GENERAL
Volume 417, Issue -, Pages 259-262Publisher
ELSEVIER
DOI: 10.1016/j.apcata.2011.12.048
Keywords
Cellulose; Hydrolysis; Sulfonic acids; Saccharification; Catalyst
Categories
Funding
- American Chemical Society - PRF [UR1-49436]
- NSF [CBET-0929970]
- USDA [CBG-2010-38821-21569]
- Directorate For Engineering
- Div Of Chem, Bioeng, Env, & Transp Sys [0929970] Funding Source: National Science Foundation
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Catalytic activities of eight alkyl/aryl sulfonic acids in water were compared with sulfuric acid of the same acid strength (0.0321 mol H+ ion/L) for hydrolysis of Sigmacell cellulose (DP similar to 450) in the 140-190 degrees C temperature range by measuring total reducing sugar (TRS), and glucose produced. Cellulose samples hydrolyzed at 160 degrees C for 3 h, in aqueous p-toluenesulfonic acid, 2-naphthalenesulfonic acid, and 4-biphenylsulfonic acid mediums produced TRS yields of 28.0, 25.4, and 30.3% respectively, when compared to 21.7% TRS produced in aqueous sulfuric acid medium. The first order rate constants at 160 degrees C in different acid mediums correlated with octanol/water distribution coefficient log D of these acids, except in the case of highly hydrophobic 4-dodceylbenzenesulfonic acid. In the series of sulfonic acids studied, 4-biphenylsulfonic acid appears to be the best cellulose hydrolysis catalyst. (C) 2012 Elsevier B.V. All rights reserved.
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