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OALib Journal期刊
ISSN: 2333-9721
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制备条件对ru/ce0.8zr0.2o2催化剂上co2甲烷化反应性能的影响
, PP. 1440-1446
Keywords: ru/ce0.8zr0.2o2,焙烧温度,co2,甲烷化,负载型催化剂
Abstract:
？采用均相法制得ce0.8zr0.2o2载体,并以其为载体等体积浸渍制得一系列负载型ru催化剂。在0.1mpa、ghsv为10000h-1、h2/co2为3.5(物质的量比)的条件下,对催化剂进行评价。借助tg-dsc、bet、h2-tpr等技术对所制备的载体和催化剂进行表征,结果表明,500℃焙烧的载体具有适中的比表面积和孔径并形成了ce-zr固溶体,与载体形成弱相互作用的ru能够显著提高催化剂的活性,适宜的还原方式能促进活性组分的均匀分布。采用500℃焙烧的载体浸渍rucl3溶液,干燥后在400℃焙烧,并使用水合肼和h2两次还原后的催化剂活性最高,在290℃时,h2转化率可达到93.57%。
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