STUDY ON DEACTIVATION OF Zn/ZSM-5 CATALYST IN CO-AROMATIZATION  REACTION OF n-PENTANE AND METHANOL

Abstract

Abstract: The deactivation factors for Zn/ZSM-5 catalyst in co-aromatization reaction of methanol and n-pentane were investigated by continuous reaction and regeneration experiments. The results were compared with the single compound aromatization. The fresh and the regenerated catalyst were characterized by XRD, NH3-TPD, Py-FTIR, BET techniques. The results showed that compared with methanol aromatization, the deactivation of the catalyst was slower, and the selectivity of aromatics was improved by co-aromatization compared with n-pentane aromatization. When methanol is present in the co-aromatization reaction system, the catalyst was deactivated not only by coke, but also by hydrothermal dealumination of molecular sieve, so that the regenerated catalyst cannot completely recover its original activity.

Key words: methanol, n-pentane, co-aromatization, Zn/ZSM-5, deactivation, regeneration

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References

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STUDY ON DEACTIVATION OF Zn/ZSM-5 CATALYST IN CO-AROMATIZATION REACTION OF n-PENTANE AND METHANOL

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