Production of hydrogen by catalytic methane decomposition over alumina supported mono-, bi- and tri-metallic catalysts. (28th December 2016)

• Record Type: Journal Article
• Authors: Al-Fatesh, A.S.; Fakeeha, A.H.; Khan, W.U.; Ibrahim, A.A.; He, Songbo; Seshan, K.
• Is Part Of: International journal of hydrogen energy. Volume 41:Number 48(2016)
• Page Start: 22932
• Page End: 22940
• Publication Date: 2016-12-28
• Subjects: Hydrogen -- Iron -- Nickel -- Cobalt -- Regeneration -- Methane decomposition; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2016.09.027
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Hydrogen, an environmentally benign source of energy, has significantly attracted the attention of researchers in recent decades. This article discusses hydrogen production by methane decomposition over alumina supported iron-nickel-cobalt based mono-, bi- and tri-metallic catalysts. The catalysts were prepared by using wet-impregnation strategy. The fresh catalysts were characterized using different techniques such as BET, H2 -TPR, and XRD. Likewise, a morphological study of selected spent catalyst was complemented by employing TEM as well as TPO. The catalytic activity results revealed that bimetallic catalysts consisting of 30 wt.% Fe and 15 wt.% Co exhibited excellent performance among all the tested catalysts. In addition, the results of sensitivity analysis revealed that an activation span of 90 min, GHSV of 5000 mL/h gcat at 700 °C as a reaction temperature were found to be the optimum process conditions. Significantly, it can be seen that in a an extended run of 1400 min involving 12 regeneration cycles, high methane conversion (>55%) can be maintained. Highlights: Hydrogen production was investigated over iron based Al2 O3 supported catalysts. Effect of doping Ni and Co over Al2 O3 supported Fe catalyst was studied. Maximum hydrogen yield over 15% Co doped 30%Fe/Al2 O3 catalyst. Well-structured nanocarbon was formed during methane decomposition reaction.