Steric effects on diffusion into bituminous coals
- Pennsylvania State University, University Park, PA (United States). Energy Institute
The reactions of maleic anhydride, cis-maleate esters, and acetylenedicarboxylate esters with Pittsburgh No. 8 or Illinois No. 6 coal using o-xylene or o-dichlorobenzene solvent are diffusion controlled. Diffusion is Fickian in all cases. The measured activation energies are between 5.4 and 7.6 kcal/mol. Diffusion rates decrease slowly with increasing alkyl chain length and sharply with branching. Diffusion rates are slightly faster with o-xylene than when o-dichlorobenzene is used. 40 refs., 5 figs., 4 tabs.
- OSTI ID:
- 20701158
- Journal Information:
- Energy and Fuels, Vol. 20, Issue 1; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
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