Kinetics of the sorption and desorption of methanol on coals of various ranks. [6 refs]
The kinetics of the sorption and desorption of methanol were measured on eight American coals varying in rank from lignite to bituminous and were found to obey a second order rate equation. A mechanism for the sorption process is proposed which explains the variation of the experimental velocity constants with pressure and with the rank of the coal. An equilibrium sorption isotherm derived from the sorption mechanism permits the calculation of the moles of sorption sites per gram of coal, A. The value of A for the eight coals is found to be related to the oxygen content, O, in moles per gram of coal by the relationship, A = 0.667(0). This relationship is consistent with the hypothesis that sorption occurs on hydroxyl groups, either unassociated or associated with carbonyl groups. From the evidence gathered from this relationship, it is concluded that sorption occurs on specific sites, probably hydroxyl groups, throughout the coal substance.
- Research Organization:
- Carnegie Inst. of Tech., Pittsburgh
- OSTI ID:
- 7254056
- Journal Information:
- Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States), Conference: Conference of the American Chemical Society, Chicago, IL, USA, 7 Sep 1958; Other Information: See CONF-580902--P1
- Country of Publication:
- United States
- Language:
- English
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