Effect of template combinations (TEA/MOR, TEA/DEA, DEA/MOR) in synthesis of nanostructured CoAPSO-34 catalyst used in conversion of methanol to light olefins

CATEGORY: METHANOL TO OLEFINS
Effect of template combinations (TEA/MOR, TEA/DEA, DEA/MOR) in synthesis of nanostructured CoAPSO-34 catalyst used in conversion of methanol to light olefins

Type	Journal Article
Author	Sogand Aghamohammadi
Author	Mohammad Haghighi
URL	http://www.sciencedirect.com/science/article/pii/S0921883116301406
Volume	27
Issue	4
Pages	1738-1749
Publication	Advanced Powder Technology
Date	July 2016
Abstract	Reports research on the synthesis of CoAPSO-34 catalysts with various templates combination to reduce the preparation cost, with implementation in methanol conversion to light olefins reaction. Researchers examined three sets of mixed templates for CoAPSO-34 synthesis, including TEA/morpholine, TEA/DEA and DEA/morpholine with constant composition of 50%:50%. Nanostructured catalyst synthesized with DEA/morpholine mixture exhibited the highest crystallinity evidenced by XRD analysis. The catalyst prepared with TEA/DEA mixed template had the smallest particle size and the most uniform particle size distribution. The highest value of Si incorporation was obtained for the catalyst prepared with DEA/morpholine mixture shown by EDX analysis. Methanol to light olefins reaction was conducted at different reaction temperatures. The stability test was conducted maintaining at constant temperature, molar feed ratio and GHSV to distinguish the effect of time on stream. In comparison, later emergence of DME in the products stream for the catalyst prepared with DEA/morpholine could be due to its higher crystallinity, specific surface area, better Si distribution and higher structural OH bands evidenced by XRD, BET, EDX and FTIR techniques, respectively.