负载型贵金属催化剂Pd(Pt)/A12O3的硫中毒机理

摘要/Abstract

摘要： 以CO和吡啶为分子探针,用红外分光光度计对用于合成尿素工业消除CO₂原料气中微量氢气的Pd(Pt)/Al₂O₃催化剂进行了表征。结果表明,负价硫(S^2-,S₂^2-是使催化剂失活的直接原因,而高价硫(SO₄^2-,Al₂O₃-SO₃-H₂O)是失活的最终原因。

关键词: 负载型贵金属催化剂, 硫中毒, 失活机理, 合成尿素原料气

Abstract: With the aid of CO and pyridine as probe molecules, infrared spectrophotometer. was ern-ployed to characterize the industrial catalyst Pd (Pt)/Al₂O₃ used for eliminating H₂ from feed CO₂ in urea synthesis. It is concluded that the factor which directly causes the deactivation of the catalyst comes from S^2- and S₂^2-,and the last factor resulting in the deactivation are S(Ⅵ)species; SO₄^2- and Al₂O₃-SO₃-H₂0 compounds.

Key words: supported noble metal catalyst, sulfur poisoning, deactivation mechanism, feed gas for urea synthesis

肖天存, 安立敦, 马军. 负载型贵金属催化剂Pd(Pt)/A1₂O₃的硫中毒机理[J]. 应用化学, 1993, 0(1): 30-33.

Xiao Tiancun, An Lidun, Ma Jun. MECHANISM OF SULFUR POISONING ON SUPPORTED NOBLE METAL CATALYST Pd(Pt)/Al₂O₃[J]. Chinese Journal of Applied Chemistry, 1993, 0(1): 30-33.

负载型贵金属催化剂Pd(Pt)/A1₂O₃的硫中毒机理

MECHANISM OF SULFUR POISONING ON SUPPORTED NOBLE METAL CATALYST Pd(Pt)/Al₂O₃

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