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- W4300982077 abstract "Uncontrollable alkylation in methanol to aromatics severely restricts the light aromatic selectivity and catalytic stability. Herein, we proposed a new strategy to control the alkylation depth by precisely regulating methanol concentration in alkylation environment. Firstly, the high Si/Al ratio ZSM-5 (HZ) was packed over Zn doped low Si/Al ratio ZSM-5 (Zn/LZ) to form dual bed to inhibit deep alkylation for high catalytic stability and BTX selectivity. Secondly, part of methanol was introduced into lower Zn/LZ bed to promote methyl-cyclopentene alkylation for aromatic production and product optimization. After such regulation, toluene selectivity in aromatics decreased from 27.9% to 20.8% accompanied by an increase in xylene selectivity from 37.1% to 44.0%. BTX selectivity in aromatics also improved to 66.7% with 97.5 h of catalyst lifetime, much higher than 50.0% and 20 h of the single Zn/LZ bed. This work realized stable light aromatic production from methanol by controlling the microscopic reaction routes." @default.
- W4300982077 created "2022-10-04" @default.
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- W4300982077 date "2023-02-01" @default.
- W4300982077 modified "2023-10-15" @default.
- W4300982077 title "Finely regulating methanol concentration to control the alkylation depth in methanol aromatization for optimizing product distribution" @default.
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- W4300982077 doi "https://doi.org/10.1016/j.apcatb.2022.122047" @default.
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