Catalytic dehydrogenation of propane and isobutane in hydrogen permselective membrane reactors

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The dehydrogenation of propane and isobutane was studied in hydrogen permselective packed bed membrane reactors and conventional packed bed reactors. Two different types of developmental membranes were investigated: sol-gel derived silica-based membranes and a pure palladium thin film supported by a porous ceramic substrate. The palladium membranes deactivated and eventually failed when exposed to both isobutane and propane dehydrogenation temperatures above 773 K. Moderate improvements in propylene and isobutylene yields were obtained with the silica-based membrane reactors. An isobutylene yield of 48 mole percent was obtained at a liquid hourly space velocity (LHSV) of 1.8 and temperature of 798 K ... continued below

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11 p.

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Collins, J. P.; Schwartz, R. W.; Sehgal, R. & Ward, T. L. September 1996.

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This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 165 times , with 6 in the last month . More information about this article can be viewed below.

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  • Sandia National Laboratories
    Publisher Info: Sandia National Labs., Albuquerque, NM (United States)
    Place of Publication: Albuquerque, New Mexico

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The dehydrogenation of propane and isobutane was studied in hydrogen permselective packed bed membrane reactors and conventional packed bed reactors. Two different types of developmental membranes were investigated: sol-gel derived silica-based membranes and a pure palladium thin film supported by a porous ceramic substrate. The palladium membranes deactivated and eventually failed when exposed to both isobutane and propane dehydrogenation temperatures above 773 K. Moderate improvements in propylene and isobutylene yields were obtained with the silica-based membrane reactors. An isobutylene yield of 48 mole percent was obtained at a liquid hourly space velocity (LHSV) of 1.8 and temperature of 798 K compared to a yield of 39 percent in a conventional reactor operated with the same flow rate. Similar improvements in propylene yield were obtained when the silica-based membranes were tested in propane dehydrogenation experiments. There was no significant difference in the reaction selectivities for the desired olefin products when the membrane and conventional reactors were operated with the scone LHSV However, for a constant value of the olefin yield, the membrane reactors had a higher reaction selectivity since the desired yield was achieved at a higher LHSV where there was less time for side products to form. Catalyst deactivation rates were generally greater in the membrane reactors, especially when the reactors were operated with high hydrogen removal rates at temperatures of 773 K and above.

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11 p.

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OSTI as DE96014067

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  • 4. international conference on inorganic membranes, Gatlinburg, TN (United States), 18 Jul 1996

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  • Other: DE96014067
  • Report No.: SAND--96-2050C
  • Report No.: CONF-9607149--1
  • Grant Number: AC04-94AL85000
  • Office of Scientific & Technical Information Report Number: 374147
  • Archival Resource Key: ark:/67531/metadc677237

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  • September 1996

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  • July 25, 2015, 2:20 a.m.

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  • Oct. 3, 2017, 6:59 p.m.

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Collins, J. P.; Schwartz, R. W.; Sehgal, R. & Ward, T. L. Catalytic dehydrogenation of propane and isobutane in hydrogen permselective membrane reactors, article, September 1996; Albuquerque, New Mexico. (digital.library.unt.edu/ark:/67531/metadc677237/: accessed November 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.