US EPA

8685806 

Journal Article 

Kinetics of the catalytic isomerization-dehydroisomerization of methylcyclopentane 

Sinfelt, JH; Rohrer, JC 

1961 

1 

Journal of Physical Chemistry
ISSN: 0022-3654 

65 

6 

978-981 

English 

10.1021/j100824a022 

https://www.scopus.com/inward/record.uri?eid=2-s2.0-0006325384&doi=10.1021%2fj100824a022&partnerID=40&md5=dea5f9ead9b199dad9743618c3e371cd
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The kinetics of isomerization-dehydroisomerization of methylcyclopentane to form cyclohexane and benzene over a platinum-on-alumina catalyst were investigated at 427 and 471°, at hydrogen pressures ranging from 0 to 20 atm. and methylcyclopentane pressures ranging from 0.1 to 10 atm. The reaction rate was found to pass through a maximum with increasing hydrogen pressure. In the absence of hydrogen no isomerization-dehydroisomerization to cyclohexane and benzene could be detected. It is suggested that at low hydrogen pressures the reaction rate is limited by the dehydrogenation activity of the catalyst, with the primary function of the hydrogen being to keep the platinum free of surface residues. At sufficiently high hydrogen pressures, however, it is suggested that the acid activity of the catalyst is controlling. The rate then decreases with increasing hydrogen pressure because of the inverse effect of hydrogen on the equilibrium concentration of methylcyclopentene intermediates.