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Effects of Nonseparable Kinetics in Alcohol Dehydration over Poisoned Silica-Alumina

Bakshi, K. R. and Gavalas, G. R. (1975) Effects of Nonseparable Kinetics in Alcohol Dehydration over Poisoned Silica-Alumina. AIChE Journal, 21 (3). pp. 494-500. ISSN 0001-1541.

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Methanol and ethanol dehydration over fresh and poisoned silica-alumina have been used as a model system to demonstrate experimentally certain effects of nonseparable kinetics including the change in product distribution upon flow reversal in a reactor with a poisoning gradient. The rate expression r = kK_A^C_A^(1/2)/(1 + K_A^C_A^(1/2) + K_W^C_W) describes the epxerimental data for all reactions although the constants for ether and olefin formation are entirely different and vary between fresh and poisoned catalysts. The nonseparability of kinetics and the concomitant variation of K_A, K_W with poisoning are briefly discussed in terms of interactions between poison molecules and surface acid-base sites.

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Gavalas, G. R.0000-0003-1468-6835
Additional Information:© 1975 American Institute of Chemical Engineers. Manuscript received September 23, 1974; revision received December 26, 1974, and accepted January 3, 1975.
Issue or Number:3
Record Number:CaltechAUTHORS:20151105-083145510
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Official Citation:Bakshi, K. R. and Gavalas, G. R. (1975), Effects of nonseparable kinetics in alcohol dehydration over poisoned silica-alumina. AIChE J., 21: 494–500. doi: 10.1002/aic.690210310
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61875
Deposited By: Ruth Sustaita
Deposited On:06 Nov 2015 20:18
Last Modified:03 Oct 2019 09:12

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