Investigation of Butane-butylene Technical Mixtures Transformation Over Modified Microporous Materials Prepared by Ion Exchange Method Into Liquid Fraction Rich in Aromatic Hydrocarbons

Abstract

The Zn and Ni were introduced into HZSM-5 zeolite by ion exchange method with aqueous solutions of Zn(NO3)2 and Ni(NO3)2, to investigate the catalytic activity and selectivity of modified Zn-HZSM-5 and Ni-HZSM-5 catalysts for conversion of butane-butylenes technical mixtures in a fixed-bed stainless-steel reactor (Twin Reactor System Naky) at 450�C, at atmospheric pressure for Zn-HZSM-5 and at 4 atm. total pressure for Ni-HZSM-5 and at a space velocity (WHSV) of 1h-1. The catalysts were characterized using XRD, SEM, and NH3-TPD analysis for their structure, morphology and acidity. The 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.

Oligo-Aromatization of Light Hydrocarbons from Petroleum Refining Processes Over ZnO/MFI Microporous Material

“…The use of a zinc modified HZSM-5 instead gallium might be preferential, especially from the environmental point of view owing to the poisonousness and the high price of gallium. The zinc (ionic, metallic or ZnO)/HZSM-5 catalyst has been made by aqueous ion exchange, incipient wetness impregnation, wet impregnation, chemical vapour deposition, sublimating volatile compounds onto zeolite, solid state reaction (ion exchange involving thermal treatment), by isomorphic https://doi.org/10.37358/RC.20.2.7943 substitution of framework silicon by zinc during the hydrothermal synthesis or by mechanical mixing of ZnO with HZSM-5 [26,[51][52][53][54][55][56][57][58][59][60][61][62][63][64][65]. The purpose of this study is to test the conversion of light hydrocarbons resulted as byproduct of petroleum refining (C3, C3 = , C4, C4 = ) into aromatics over physically mixture ZnO/HZSM-5 co-catalyst.…”