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https://doi.org/10.37358/Rev.Chim.1949

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Revista de Chimie (Rev. Chim.), Year 2015, Volume 66, Issue 12,





RALUCA ELENA DRAGOMIR, PAUL ROSCA, LIANA BOGATU
Upgrading of the FCC Gasoline Quality

Abstract:

This paper presents researches which aims, to upgrade the quality of catalytic cracking gasoline, in terms of reducing the sulfur content ([10 ppm), through a deep hydrodesulphurization (HDS) process, with recovery of the octane loss due to a partial saturation of olefins, by etherification of unsaturated C5-C7 hydrocarbons. Due to the convenient distribution of olefins in the first part and sulfur compounds in the last part of the cracked naphtha TBP curve, the FCC gasoline was separated into a light fraction (32-95°C) and heavy fraction (95-188oC), which was subjected to deep HDS over CoMo / Al2O3 and NiMo / Al2O3 catalysts. The various temperatures which may influence the selectivity in (HDS) versus olefins hydrogenation are also discussed. To recovery 2-6 octane loss by HDS, the C5-C7 olefins from light FCC gasoline was etherificated with methanol and ethanol over Purolite CT 275 catalyst. Etherification associated with usage of alcohols from biomass ensure the renewable component of the commercial gasoline. Keywords: octane number, hydrodesulfurization, FCC gasoline, etherification, alcohols


Issue: 2015, Volume 66, Issue 12
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