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OALib Journal期刊
ISSN: 2333-9721
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k2ti2o5的制备及其对柴油机尾气碳黑催化氧化的性能
DOI: 10.3969/j.issn.1671-7627.2013.04.012, PP. 58-62
Keywords: 柠檬酸配位燃烧法,柴油机尾气,钛酸钾,碳黑催化氧化
Abstract:
以醋酸钾(ch3cook)、钛酸四丁酯(ti(oc4h9)4)、无水乙醇和柠檬酸等为原料,采用柠檬酸配位燃烧法合成钛酸钾系列碳黑氧化催化剂(doc)k2ti2o5。利用x线衍射仪(xrd)、场发射扫描电子显微镜(fesem)、透射电子显微镜(tem)表征k2ti2o5的晶相及表面形貌;利用程序升温反应(tpr)考察老化时间、k2ti2o5与碳黑颗粒的接触方式、焙烧温度、尾气中so2和水蒸气含量、重复使用等因素对k2ti2o5催化活性的影响。结果表明:k2ti2o5催化活性较高,起燃温度低至280℃,峰值温度为322℃,催化活性在同类活性金属钛氧化物中最好,并且具有良好的重复使用稳定性及抗so2和水蒸气稳定性。
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