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长链烷烃异构催化剂Pt/H-ZSM-22的失活原因研究
Authors
刘全杰
李灿
王刚
韩崇仁
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Abstract
采用XRD、N2低温物理吸附、NH3-TPD和TEM等手段对长时间运转后的Pt/H—ZSM-22催化剂进行表征。结果表明,运转3000h的催化剂上积炭量只有3.20%,而运转7600h后,催化剂的积炭量高达7.84%。积炭造成催化剂孔体积和比表面积下降,导致催化剂失活,微量硫、氮化合物的存在也可导致催化剂活性下降,采用常规的烧炭方法可以使催化剂的性质得到恢复
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Last time updated on 07/01/2020