Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 266, Issue -, Pages 117-125Publisher
ELSEVIER
DOI: 10.1016/j.micromeso.2018.02.046
Keywords
Catalytic dehydrogenation; Isobutane; Ordered mesopore; Fe-SBA-15
Categories
Funding
- National Natural Science Foundation of China [21573260, 21403255]
- Youth Innovation Promotion Association CAS [2017460]
- Jiangsu Science and Technology Program [BY2016048-01]
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Fe-incorporated SBA-15 catalysts were prepared via hydrothermal method using urea as self-regulator for pH. The obtained catalysts expressed highly ordered mesoporous structures proved by N-2 adsorption-desorption, XRD and TEM characterization, also were tested for their activity in dehydrogenation of isobutane. Moderately and strongly acidic sites as well as Fe3+ species were identified as active sites. The ordered mesoporous iron-silica catalyst displayed better catalytic stability as compared with amorphous iron-silica catalyst, which was ascribed to the confinement effect of ordered meso-structure. Moreover, framework iron improved the interaction of iron with the support and increased more weakly acidic sites, which were favorable to restrain the coke formation. The coke was a major cause for catalytic deactivation.
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