The up gradation of methane or natural gas to valuable chemical feedstock proceeds through indirect routs by initial conversion to syngas, become a worldwide research focus. The generation of syngas can be carried out by steam reforming or by CO2 reforming and even through partial oxidation of methane (POM). Although POM has high methane conversion with excellent syngas selectivity and extremely fast reaction kinetics, but it suffers from local heat generation over the catalyst and integrated safety issues. Whereas the steam and CO2 reforming do not suffer from those safety issues but steam reforming of methane produce CO2 along with syngas, which need to remove before its downstream gas-to-liquid (GLT) applications. However, despite of unfavorable thermodynamics dry reforming of methane has some unique advantages; it can generate syngas at CO/H2 with 1:1 molar ratio; moreover it becomes advantageous because of the use of two greenhouse gases at a time. From this perspective, the dry reforming of methane has drawn much attention in recent years and is now viewed as an area to produce ultra-pure hydrogen or syngas for fuel alternatives for the major oil companies. Gd promoted Ni-ZSM-5 catalyst was prepared and its activity was investigated in methane dry reforming with carbon dioxide over atmospheric pressure. Very high conversion of methane (~96%) with CO to H2 molar ratio of ~1 was achieved at 750 �C and the activity of the catalyst remains unchanged even after 40 h of time on stream; which shows the excellent coke resistant property of the catalyst. The catalyst was characterized by XRD, ICP-AES, XPS, TPR, BET- surface area, FESEM, HR-TEM and EXAFS. TEM analysis revealed the formation Ni-particle with size between 2-10 nm and the particle size remain same during the dry reforming. Different reaction parameters like contact time, temperature etc. were studied in detail.

Gd promoted Ni-ZSM-5 catalyst for carbon dioxide reforming of methane

246th National Meeting (2013)

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