"Introduction to Zeolite Molecular Sieves, 3rd Edition" presents a collection of the most important results and ideas in the field of molecular sieve chemistry and technology, the most important experimental techniques related to the research activities in molecular sieves, and identifies new areas of molecular sieve chemistry Chapters start at a reasonably simple entry level, but also covers the present state-of-the-art in the field Topics covered include structure, synthesis, characterization, ion exchange, adsorption, diffusion, separations, and natural zeolites 6 years since the last edtion, this book brings together the rapid development within the field of molecular sieve chemistry and applications It is accessible to newcomers to the field, also containing valuable information for experienced researchers It contains 27 chapters written by renowned scientists in their field, including updates on some 2nd edition chapters

Introduction to zeolite science and practice

Degradation of sulfamethoxazole by cobalt-nickel powder composite catalyst coupled with peroxymonosulfate: Performance, degradation pathways and mechanistic consideration

The pyrolysis kinetics of the conversion of Malaysian kaolin to metakaolin

Fabrication and characterization of mullite ceramic hollow fiber membrane from natural occurring ball clay

Catalytic conversion of light alkanes to aromatics by metal-containing HZSM-5 zeolite catalysts—A review

Synthesis of ZSM-5 from impure and beneficiated Grahamstown kaolin: Effect of kaolinite content, crystallisation temperatures and time

The aim of this study is to investigate the promotional effect of Fe–Mo, Co–Mo, and Ni–Mo bimetallic additives on the activity and stability of H-ZSM-5 zeolite for isomerization of 1-hexene. The catalysts were synthesized by wet-impregnation method and characterized by XRD, FTIR, BET, ICP-AES, HRSEM-EDS, HRTEM, H2-TPR, NH3-TPD, and pyridine-DRIFT analysis. The isomerization of 1-hexene was carried out in a micro-scale system under the conditions: T = 250 °C, P = 4.0 MPa, FR = 0.1 ml/min, WHSV = 1 h−1. The conversion of 1-hexene over the 4 g bed of catalyst was in the range of 95–97% after 74 h time-on-stream with cis-3-hexene and cis-2-hexene as the principal products. It was shown that the appearance of the new strong Lewis acid sites, decreases the ratio of Bronsted/Lewis acid sites. Increase of the weak Lewis acid sites in the 2.5 wt%Ni2.5 wt%Mo-ZSM-5 catalyst facilitated the isomerization of 1-hexene and showed higher C6 olefin selectivity (48.4 mol%), research octane number (99.7), and bromine number (148.3) than other studied catalysts.

1-hexene isomerization over bimetallic M-Mo-ZSM-5 (M: Fe, Co, Ni) zeolite catalysts: Effects of transition metals addition on the catalytic performance

Effect of Fe-Mo promoters on HZSM-5 zeolite catalyst for 1-hexene aromatization

Oligomerization of lower olefins to fuel range hydrocarbons over texturally enhanced ZSM-5 catalyst

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.

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Masikana M. Mdleleni

Papers

Synthesis of ZSM-5 from impure and beneficiated Grahamstown kaolin: Effect of kaolinite content, crystallisation temperatures and time

1-hexene isomerization over bimetallic M-Mo-ZSM-5 (M: Fe, Co, Ni) zeolite catalysts: Effects of transition metals addition on the catalytic performance

Effect of Fe-Mo promoters on HZSM-5 zeolite catalyst for 1-hexene aromatization

Oligomerization of lower olefins to fuel range hydrocarbons over texturally enhanced ZSM-5 catalyst

Catalytic cracking of naphtha: The effect of Fe and Cr impregnated ZSM-5 on olefin selectivity