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Kwak, Ja Hun
Molecular Catalysis lab
Research Interests
  • Heterogeneous catalysis, molecular catalysis, ASlumima, zeolites

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Effects of crystallinity on dilute acid hydrolysis of cellulose by cellulose ball-milling study

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Title
Effects of crystallinity on dilute acid hydrolysis of cellulose by cellulose ball-milling study
Other Titles
Effects of crystallinity on dilute acid hydrolysis of cellulose by cellulose ball-milling study
Author
Zhao, HaiboKwak, JahunWang, YongFranz, James A.White, John M.Holladay, Johnathan E.
Keywords
:NEUTRON FIBER DIFFRACTION; HYDROGEN-BONDING SYSTEM; SYNCHROTRON X-RAY; STATE C-13 NMR; NATIVE CELLULOSE; BOUND WATER
Issue Date
2006-03
Publisher
AMER CHEMICAL SOC
Citation
ENERGY & FUELS, v.20, no.2, pp.807 - 811
Abstract
The dilute acid (0.05 M H2SO4) hydrolysis at 175 degrees C of samples comprised of varying fractions of crystalline (alpha-form) and amorphous cellulose was studied. The amorphous content, based on XRD and CP/MAS NMR, and the product (glucose) yield, based on HPLC, increased by as much as a factor of 3 upon ball milling. These results are interpreted in terms of a model involving mechanical disruption of crystallinity by breaking hydrogen bonds in alpha-cellulose, opening up the structure, and making more beta-1,4 glycosidic bonds readily accessible to the dilute acid. However, in parallel with hydrolysis to form liquid-phase products, there are reactions of amorphous cellulose that form solid degradation products
URI
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DOI
10.1021/ef050319a
ISSN
0887-0624
Appears in Collections:
ECHE_Journal Papers
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