Title: Zeolite catalysed light hydrocarbon conversions

Authors: N. Viswanadham, G. Murali Dhar, M.O. Garg

Addresses: Catalysis and Conversion Process Division, Indian Institute of Petroleum, Dehradun 248005, India. ' Catalysis and Conversion Process Division, Indian Institute of Petroleum, Dehradun 248005, India. ' Catalysis and Conversion Process Division, Indian Institute of Petroleum, Dehradun 248005, India

Abstract: Availability of light alkane containing feedstocks in petroleum industry demands the catalysts and conversion processes. Two zeolites, ZSM-5 and Mordenite were used for the preparation of a series of catalysts for the conversion of pure light hydrocarbons and industrial feedstocks. Cracking and aromatisation activity of the H-ZSM-5 catalysts varied with the catalyst properties and feed composition. The cracking and hydrogen transfer reactions are facilitated in the HZS catalyst and resulted in the formation of aromatics along with Liquefied Petroleum Gas (LPG). Pt/Mordenite-based catalyst could improve the isoparaffin composition in the industrial feedstocks, where along with n-paraffins, considerable amount of olefins, naphthenes and aromatics were also converted into iso-paraffins through hydrogenation, ring-opening and isomerisation reactions. Benzene in the feedstock was successfully converted and the product exhibited almost zero benzene at optimised reaction conditions.

Keywords: zeolites; ZSM-5; Mordenite; light alkanes; cracking; aromatisation; isomerisation; light hydrocarbon conversions; feedstocks; petroleum industry; liquefied petroleum gas; LPG.

DOI: 10.1504/IJOGCT.2008.016736

International Journal of Oil, Gas and Coal Technology, 2008 Vol.1 No.1/2, pp.138 - 151

Published online: 18 Jan 2008 *

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