Journal
JOURNAL OF CO2 UTILIZATION
Volume 25, Issue -, Pages 330-337Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jcou.2018.02.014
Keywords
CO2 Hydrogenation; TiO2 Support; Fe-based bimetallic catalyst; K/La promotion
Funding
- Pennsylvania State University through the EMS Energy Institutes
- Penn State's Institute of Energy and the Environment
- Thailand Research Fund through the Royal Golden Jubilee Ph.D. Program Scholarship
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A comparative study was carried out on the CO2 hydrogenation activities and product selectivities of the titania-supported monometallic and bimetallic Fe-based catalysts prepared by one-step wet impregnation. Among the monometallic catalysts (Fe, Co and Cu/TiO2), only Fe/TiO2 catalyst exhibited some selectivity to higher hydrocarbons, while Co/TiO2 and Cu/TiO2 were highly selective only to CH4 and CO, respectively. The addition of a small amount of second metal (Co and Cu) on Fe showed the synergetic promotion on the CO2 conversion and the space-time yields (STY) of hydrocarbon products. The incorporation of K and La as promoters can further improve the activity and product selectivity to higher hydrocarbons, indicating that the promoted Fe-based bimetallic catalysts are promising for CO2 hydrogenation to higher hydrocarbons.
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