Back to Search
Start Over
Silica-doped TiO2 as support of gallium oxide for dehydrogenation of ethane with CO2.
- Source :
-
Fuel Processing Technology . Aug2018, Vol. 177, p246-254. 9p. - Publication Year :
- 2018
-
Abstract
- Dehydrogenation of ethane to ethylene in the presence or absence of CO 2 over silica-doped TiO 2 supported Ga 2 O 3 catalysts was investigated. The silica doping of TiO 2 support greatly improved the dehydrogenation activity in the absence of CO 2 , which can be ascribed to the increased acid sites. The initial activity in the presence of CO 2 decreased after the silica doping, due to the reduction in reverse water-gas shift ability. However, the selectivity as well as the stability increased, resulting in higher steady ethylene yield. A dynamic process consisting of alternative oxidative dehydrogenation/regeneration cycles by gasifying the carbon deposit with air for 10 min after each cycle of 6 h reaction was also performed and relatively stable ethane conversion ~30% and ethylene yield ~25% can be achieved. The different catalytic behaviors are probably associated with the different state of gallium species, caused by the different interaction between the Ga 2 O 3 and support. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ETHANES
*GALLIUM
*TITANIUM oxides
*DEHYDROGENATION
*CARBON dioxide
Subjects
Details
- Language :
- English
- ISSN :
- 03783820
- Volume :
- 177
- Database :
- Academic Search Index
- Journal :
- Fuel Processing Technology
- Publication Type :
- Academic Journal
- Accession number :
- 129946829
- Full Text :
- https://doi.org/10.1016/j.fuproc.2018.04.037