Comparative study of the catalytic performance of physically mixed and sequentially utilized γ-alumina and zeolite in methanol-to-propylene reactions
Anahita Mortazavi-Manesh, Nasser Safari, Mojtaba Golbodaqi, Shirin Latifi, Mohammad Fatehi Haghighat, Farzad Bahadoran
TL;DR
This paper compares the performance of γ-alumina and zeolite in converting methanol to propylene, finding that their physical mixture works best.
Contribution
The first documented use of γ-alumina and zeolite together in methanol-to-propylene reactions.
Findings
Physically mixed γ-Al2O3 and H-ZSM-5 zeolite showed highest catalytic activity at 400°C.
Mesoporous γ-Al2O3 was successfully prepared using sol–gel and hydrothermal methods.
Methanol conversion and product selectivity were analyzed using gas chromatography.
Abstract
This study aimed to investigate the catalytic performance of H-ZSM-5 zeolite compared with physically mixed and sequentially used synthesized γ-alumina and zeolite in the methanol-to-propylene (MTP) reaction. A facile, green and cost-effective method was first applied to prepare a mesoporous γ-Al2O3 support using a combination of sol–gel and hydrothermal methods via a few consecutive steps. This process was carried out using aluminium nitrate and polyethylene glycol with different molecular weights as non-ionic surfactants. X-ray diffraction, transmission electon microscopy, thermogravimetric analysis, ammonia temperature programmed desorption and Brunauer–Emmett–Teller analysis were then used to characterize the prepared γ-Al2O3 catalyst. Afterwards, the catalytic activity of the commercial H-ZSM-5 zeolite (Si/Al = 200) and the effect of the presence of the γ-alumina physically mixed…
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Taxonomy
TopicsZeolite Catalysis and Synthesis · Mesoporous Materials and Catalysis · Catalysis and Hydrodesulfurization Studies