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Dehydrogenation of Propane over Platinum Containing CIT-6

Andy, P. and Davis, M. E. (2004) Dehydrogenation of Propane over Platinum Containing CIT-6. Industrial & Engineering Chemistry Research, 43 (12). pp. 2922-2928. ISSN 0888-5885. doi:10.1021/ie030357m.

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The catalytic dehydrogenation of propane is carried out on platinum-impregnated CIT-6 catalysts. Prior to loading platinum, numerous postsynthesis treatments of the as-made CIT-6 are investigated, e.g., calcination, structure directing agent (SDA) extraction, ion exchange, etc., to observe the effects of catalyst preparation on the dehydrogenation of propane. The catalytic behavior depends strongly on the method of postsynthesis treatment. When the as-made CIT-6 is contacted with NH_4NO_3 to remove the SDA prior to platinum loading, an active, selective, and stable catalyst is obtained. ^(29)Si NMR studies show that, after this postsynthesis treatment, some of the zinc remains within the CIT-6 framework. Contacting as-made CIT-6 with Zn(NO_3)_2 to remove the SDA prior to platinum loading gives a solid with a higher level of extraframework zinc. This additional amount of extraframework zinc does not lead to a more stable catalyst. When as-made CIT-6 is contacted with acetic acid at 60 °C, the SDA and also the zinc are extracted to give pure-silica CIT-6. Platinum loading into this material gives a catalyst that deactivates very rapidly. Thus, framework zinc appears to be essential for the creation of a stable platinum-impregnated CIT-6 catalyst for propane dehydrogenation.

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Davis, M. E.0000-0001-8294-1477
Additional Information:© 2004 American Chemical Society. Received 24 April 2003. Date accepted 2 July 2003. Published online 16 September 2003. Published in print 1 June 2004. We thank Warren Smith of BP for suggesting that we investigate Pt/CIT-6 as a catalyst for dehydrogenation reactions and acknowledge the financial support of BP. It has been a pleasure for M.E.D. to work with Professor George Gavalas over the past decade, and we are delighted to provide this contribution in his honor.
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Issue or Number:12
Record Number:CaltechAUTHORS:20170421-102633668
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Official Citation:Dehydrogenation of Propane over Platinum Containing CIT-6 P. Andy and M. E. Davis Industrial & Engineering Chemistry Research 2004 43 (12), 2922-2928 DOI: 10.1021/ie030357m
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76814
Deposited By: Ruth Sustaita
Deposited On:21 Apr 2017 18:17
Last Modified:15 Nov 2021 17:02

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