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OALib Journal期刊
ISSN: 2333-9721
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h2o和so2对ce(1)mn(3)ti催化剂催化氧化no性能的影响
, PP. 866-871
Keywords: no,催化氧化,抗硫抗水,ce掺杂mnox/tio2
Abstract:
？为了提高mnox/tio2催化剂催化氧化no的活性,在载体tio2上负载醋酸锰的同时掺杂了一定量的硝酸铈,构成了ce(1)mn(3)ti催化剂,并对催化剂进行xrd、bet和xps等表征。重点考察了h2o和so2对催化剂活性的影响,通过ft-ir、sem和bet等表征手段对毒化前后的催化剂组成及结构进行了分析。结果表明,ce(1)mn(3)ti催化剂具有较好的活性,在空速41000h-1、no体积分数为300×10-6及o2含量10%的条件下,反应温度200℃时no转化率可达58%,250℃时no转化率达到最高值85%。单独加入4%h2o使得催化剂活性降低,升高反应温度,h2o对催化剂的影响减弱;同时通入4%h2o和100×10-6so2,在反应温度250℃时,no转化率下降并维持在48%左右,停止通入后恢复到61%。h2o和so2使催化剂活性物种硫酸盐化失活。
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