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• W2090123601 abstract "The conversion of methanol was carried out over various mordenite zeolite catalysts to evaluate their catalytic performance. A post-preparation treatment of the H-MOR catalyst by halogenation with NH 4 Cl or NH 4 F and by hydrohalogenation with HCl or HF was carried out and its effect on methanol conversion reactions at 100–300 °C in a continuous flow reactor was investigated. The as-synthesized H-mordenite (H-MOR) is generally more active during dimethyl ether (DME) production than the NH 4 -MOR and Na-MOR. Fluorinated treatment with HF or NH 4 F significantly improved the catalytic activity during methanol conversion and the formation of DME in comparison to chlorinated treatments with HCl or NH 4 Cl. This is principally attributed to the higher Si/Al ratio and an increase in the number of acid sites and their strength. Halogenation treatment with the acids of F − or Cl − gave the highest conversion activity for DME production compared to halogenation treatments with the salts of the same halogens. Zeolite dealumination by the acids was more profound than that by the halogen ion salts, which resulted in a decrease in the crystallinity and crystallite sizes of the zeolite. Dimethyl ether (DME) production from methanol was optimized because of its industrial importance as a future diesel fuel. An increase in the acidity and a decrease in the crystallite size of H-MOR by treatment with NH 4 Cl, NH 4 F, HCl, or HF led to an increase in DME production. However, hydrohalogenation was found to be more effective than halogenation." @default.
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• W2090123601 date "2011-01-01" @default.
• W2090123601 modified "2023-10-01" @default.
• W2090123601 title "Conversion of Methanol Using Modified H-MOR Zeolite Catalysts" @default.
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• W2090123601 doi "https://doi.org/10.1016/s1872-2067(10)60187-8" @default.
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