Iuliean Vasile ASAFTEi, IOAN GABRIEL SANDU, NECULAI CATALIN LUNGU, LUCIAN MIHAIL BIRSA,LAURA GABRIELA SARBU, MARIA IGNAT<br>Conversion of Butane-Butylene Mixtures over B(Al)-HZSM-5 Catalyst Prepared by Impregnation and over ZnO/HZSM-5 Co-Catalyst Prepared by Mechanical Mixing

Iuliean Vasile ASAFTEi, IOAN GABRIEL SANDU, NECULAI CATALIN LUNGU, LUCIAN MIHAIL BIRSA,LAURA GABRIELA SARBU, MARIA IGNAT
Conversion of Butane-Butylene Mixtures over B(Al)-HZSM-5 Catalyst Prepared by Impregnation and over ZnO/HZSM-5 Co-Catalyst Prepared by Mechanical Mixing

Abstract:

This paper presents the results of the conversion of light hydrocarbons (mixtures of butanes/butylenes with variable composition) resulted as by-products of the petroleum refining (FCC) over bifunctional B(Al)-HZSM-5 catalyst prepared by impregnation of HZSM-5 zeolite with boric acid and over bifunctional 5% ZnO/HZSM-5 co-catalyst (mechanic mixture) in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450oC, 8 atm. and 4 atm. total pressure and at a space velocity (WHSV) of 1h -1The catalytic activity of the same catalyst were examined during over 10 catalytic tests (with regeneration of catalyst after each test) using mixtures of butanes-butylenes. Catalytic activity and selectivity towards liquid products - BTX aromatic hydrocarbons and oligo (iC5-iC10 , nC5-nC10 , ]C10) - depend on time on stream, composition of butanes-butylenes mixture and pressure. In the first hours of each test the aromatic BTX are the main component of the liquid product (connected with butylenes consume) and after that, the oligo fraction become predominant. Keywords: conversion, light hydrocarbons, B- HZSM-5, ZnO/HZM-5

Issue: 2016, Volume 67, Issue 5

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