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焙烧温度对Pd-Cu/凹凸棒土CO常温催化氧化性能的影响

王永钊 ,  程慧敏 ,  范莉渊 ,  石晶 ,  赵永祥

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引用本文: 王永钊, 程慧敏, 范莉渊, 石晶, 赵永祥. 焙烧温度对Pd-Cu/凹凸棒土CO常温催化氧化性能的影响[J]. 燃料化学学报, 2014, 42(5): 597-602. shu
Citation:  WANG Yong-zhao, CHENG Hui-min, FAN Li-yuan, SHI Jing, ZHAO Yong-xiang. Effect of calcination temperature on catalytic performance of Pd-Cu/attapulgite clay catalyst for CO oxidation at room temperature[J]. Journal of Fuel Chemistry and Technology, 2014, 42(5): 597-602. shu

焙烧温度对Pd-Cu/凹凸棒土CO常温催化氧化性能的影响

    通讯作者: 王永钊,Fax:+86-351-7011688,E-mail:catalyst@sxu.edu.cn; 赵永祥,E-mail:yxzhao@sxu.edu.cn。; 王永钊,Fax:+86-351-7011688,E-mail:catalyst@sxu.edu.cn; 赵永祥,E-mail:yxzhao@sxu.edu.cn。
  • 基金项目:

    国家自然科学基金(21073114) (21073114)

    山西省青年科技研究基金(2010021008-3)。 (2010021008-3)

摘要: 以凹凸棒土(APT)作载体,采用等体积浸渍法制备了Pd-Cu/APT催化剂,以CO氧化为探针反应,在连续流动微反装置上,考察了焙烧温度对催化剂CO常温催化氧化性能的影响。通过N2-物理吸附、XRD、TG、FT-IR和H2-TPR等手段对催化剂的结构和性质进行了表征。结果表明,随焙烧温度升高,Pd-Cu/APT中载体逐步脱水,进而引起催化剂结构和织构变化,其中,Cu物种由Cu(OH)Cl逐渐向CuO转变,同时,高分散的Pd物种与Cu物种间相互作用先增强后减弱。经300 ℃焙烧的催化剂比表面积大,Cu物种以Cu(OH)Cl形式存在,且具有良好的分散状态,与Pd物种之间产生较强的相互作用,显著提高了其还原性能。在空速6 000 h-1、CO体积分数0.5%、水蒸气体积分数3.3%的反应条件下,常温可将CO完全转化800 min以上。焙烧温度高于或低于300 ℃均引起CO常温催化氧化性能的下降。

English

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  • 收稿日期:  2013-11-11
  • 网络出版日期:  2014-01-06
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