Fluidized-Bed Isobutane Dehydrogenation over Alumina-Supported Ga2O3 and Ga2O3–Cr2O3 Catalysts
| Autor: | Sergey Petrovich Fedorov, Atte Aho, Päivi Mäki-Arvela, Anna N. Matveyeva, Nikolai A. Pakhomov, Nadezhda A. Zaitseva, Anastasia Bachina, Dmitry Yu. Murzin |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
General Chemical Engineering Catalyst support Oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering Chromia 0104 chemical sciences Catalysis chemistry.chemical_compound Adsorption chemistry Chemical engineering Isobutane Dehydrogenation Hexavalent chromium 0210 nano-technology |
| Zdroj: | Industrial & Engineering Chemistry Research. 57:927-938 |
| ISSN: | 1520-5045 0888-5885 |
| DOI: | 10.1021/acs.iecr.7b04571 |
| Popis: | Dehydrogenation of isobutane to isobutene over supported gallium oxide microspherical catalysts was investigated in a fluidized-bed reactor. A partially crystallized nanostructured aluminum hydroxide-oxide, which is a product of gibbsite centrifugal thermal activation (CTA) obtained using a CEFLAR technology, was used as a catalyst support. The structural and textural properties of Ga2O3/Al2O3 catalysts were characterized by a range of techniques including XRD, N2-physisorption, TPD of NH3 and CO2, IRS of adsorbed pyridine, and selective adsorption of a series of acid–base indicators. A Ga–Al oxide catalyst exhibited a stable performance close to activity of Cr–Al oxide catalysts not containing soluble hexavalent chromium. Upon addition of Cr2O3 (6 wt % of Cr), in amounts lower than in an industrial chromia/alumina catalyst (10.9% Cr), and 1% ZrO2 to 6%Ga/Al2O3 catalytic activity in isobutane dehydrogenation reaches the performance of the industrial KDM catalyst (“Sintez”, Russia). |
| Databáze: | OpenAIRE |
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