期刊
CATALYSTS
卷 6, 期 3, 页码 -出版社
MDPI AG
DOI: 10.3390/catal6030040
关键词
hydrogen; iron; ceria; cobalt; carbon nano-tubes
资金
- King Abdulaziz City for Science and Technology (KACST) [AT-34-4]
Catalytic methane decomposition is studied in a fixed bed reactor. Two sets of bimetallic catalysts are employed, namely: 30%Fe-X%Ce/Al2O3 and 30%Fe-X%Co/Al2O3, and compared with monometallic 30%Fe/Al2O3 catalyst. The effect of promoting Fe with Ce and Co and reduction temperature are investigated. The results reveal that Ce addition has shown a negative impact on H-2 yield while a positive effect on H-2 yield and catalyst stability are observed with Co addition. In terms of number of moles of produced hydrogen per active sites, Fe/Al2O3 has shown a higher number of moles of hydrogen compared to bimetallic catalysts. The catalyst reduced at 500 degrees C exhibits better activity as compared to the catalyst reduced at 950 degrees C. Carbon nano-tubes are deposited on the catalyst within the range of 14-73 nm diameter. Two types of carbon nanotubes are detected: C alpha and C gamma.
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