期刊
ARABIAN JOURNAL OF CHEMISTRY
卷 13, 期 1, 页码 3236-3245出版社
ELSEVIER
DOI: 10.1016/j.arabjc.2018.10.008
关键词
Ammonia synthesis; Ethylbenzene; High surface area alumina; Molybdenum nitride; Reverse water gas shift reaction; Styrene
资金
- Department of Science and Technology (DST), New Delhi, India [DST/IS-STAC/CO2-SR-136/12(G), DST/WTI/2K15/168]
The present work highlights the synthesis of styrene from ethylbenzene dehydrogenation by coupling with reverse water gas shift reaction (RWGSR) and ammonia synthesis reactions over high surface area Al2O3 supported molybdenum nitride (gamma-Mo2N) catalyst. gamma-Mo2N was prepared by in-situ thermal decomposition of molybdenum hexamethylenetetramine complex and the support high surface area Al2O3 (HSA) was prepared by sol-gel method. Different weight loadings of gamma-Mo2N (10, 20 and 30) supported on HSA catalysts were systematically characterized by using powder XRD, N-2 physisorption, H-2 - TPR, XPS and TEM analysis. XRD, TEM and normalized BET surface area analysis reveal highly dispersed nitride species over HSA surface. The synthesized catalysts have been studied for ethylbenzene dehydrogenation reaction using CO2 and N-2 as feed gases with different percentage compositions. It was found that CO2 rich N-2 feed gas favors higher ethylbenzene conversion due to RWGSR and N-2 rich CO2 favors higher selectivity to styrene due to ammonia synthesis. EB dehydrogenation along with RWGSR and ammonia synthesis reactions come along and privileged the formation of higher styrene yields. (C) 2018 Production and hosting by Elsevier B.V. on behalf of King Saud University.
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