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OALib Journal期刊
ISSN: 2333-9721
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硫中毒对cu/γ-al2o3催化含硫低浓度甲烷燃烧特性的影响
, PP. 635-640
Keywords: cu/&gamma,-al2o3催化剂,低浓度甲烷,催化燃烧,so2,硫中毒
Abstract:
？采用浸渍法制备了质量分数11.32%cu/γ-al2o3催化剂，采用固定床反应器，考察了so2浓度（0~0.02%）对低浓度甲烷（体积分数，3%）催化燃烧特性的影响，通过反应前后催化剂的微观结构及化学成分检测，结合理论分析，探讨了催化反应的硫中毒原因。研究表明，so2的通入导致了cu/γ-al2o3催化剂活性及稳定性的降低，在同一反应温度下，甲烷转化率随着so2浓度的增加而下降。sem、eds、ft-ir、xrd表征结果表明，so2会导致cu/γ-al2o3催化剂表面出现结块现象，催化剂表面有硫元素的累积，且以硫酸盐的形式存在，其主要成分为硫酸铜（cuso4）。在富氧条件下，so2分子及氧离子在cu2+上吸附所形成的硫酸铜，附着在催化剂表面，形成一层坚硬的外壳，是产生硫中毒现象的根本原因。
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