Catalytic cracking of naphtha: The effect of Fe and Cr impregnated ZSM-5 on olefin selectivity
Loading...
Date
2018
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Nature
Abstract
This study focuses on the modification of ZSM-5 in order to enhance the catalytic cracking of refinery naphtha to produce
light olefins. ZSM-5 was metal modified using different loadings (0.5–5 wt%) of Fe and Cr via the impregnation method.
The metal modified ZSM-5 samples are compared and the effect of metal loading on the physicochemical properties and
catalytic performance is investigated. Fe and Cr modification had an effect on both the physicochemical properties of the
catalysts as well as catalytic activity and selectivity. Metal loading caused a decrease in the specific surface area which
decreased further with increased metal loading. Fe had a greater effect on the total acidity in particular strong acid sites when
compared to Cr. The optimum Fe loading was established which promoted selectivity to olefins, in particular propylene. Fe
also had a dominant effect on the P/E ratio of which a remarkable ratio of five was achieved as well as enhanced the stability
of the catalyst. Cr was found to be a good promoter for selectivity to BTX products with a two-fold increase observed when
compared to Fe-modified catalysts.
Description
Keywords
ZSM-5, Metal-modified, Catalytic cracking, Naphtha, Olefins
Citation
Mohiuddin, E., Mdleleni, M.M. & Key, D. Appl Petrochem Res (2018) 8: 119. https://doi.org/10.1007/s13203-018-0200-2