Dual-template synthesis of nanostructured CoAPSO-34 used in methanol to olefins: Effect of template combinations on catalytic performance and coke formation
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Type
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Journal Article
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Author
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Sogand Aghamohammadi
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Author
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Mohammad Haghighi
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URL
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Volume
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264
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Pages
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359-375
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Publication
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Chemical Engineering Journal
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Date
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March 15, 2015
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Abstract
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Researchers studied methanol conversion to light
olefins over SAPO-34 catalysts with Co introduction to examine the effect of
different mixed templates. Applying mixed templates resulted in enhancement
of catalyst life time and the reduction in catalyst preparation costs
compared to those prepared with single template.
Their focus was on the synthesis of CoAPSO-34 catalysts with various mixtures of templates including TEAOH template. Application of TEAOH/DEA and TEAOH/morpholine binary templates resulted in higher dispersion of Si and Co metals. Methanol to light olefins reaction was carried 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 TEAOH/morpholine can be due to its higher crystallinity, better Si distribution and higher structural OH bands evidenced by XRD, EDX and FTIR techniques, respectively. |
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