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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

张力 ,  刘建军 ,  杨仲卿 ,  郑世伟

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引用本文: 张力, 刘建军, 杨仲卿, 郑世伟. 硫中毒对Cu/γ-Al2O3催化含硫低浓度甲烷燃烧特性的影响[J]. 燃料化学学报, 2014, 42(5): 635-640. shu
Citation:  ZHANG Li, LIU Jian-jun, YANG Zhong-qing, ZHENG Shi-wei. Effects of sulfur poisoning on combustion characteristics of low concentration methane with SO2 over Cu/γ-Al2O3 catalysts[J]. Journal of Fuel Chemistry and Technology, 2014, 42(5): 635-640. shu

硫中毒对Cu/γ-Al2O3催化含硫低浓度甲烷燃烧特性的影响

  • 基金项目:

    国家自然科学基金(51206200) (51206200)

    中央高校基本科研业务经费(CDJZR12140031)。 (CDJZR12140031)

摘要: 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。

English

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  • 收稿日期:  2013-10-16
  • 网络出版日期:  2014-01-15
通讯作者: 陈斌, bchen63@163.com
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