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OALib Journal期刊
ISSN: 2333-9721
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焙烧温度对k-cu/zn/la/zro2催化剂上异丁醇合成的影响
, PP. 868-874
Keywords: 合成气,异丁醇,焙烧温度,铜,氧化锆
Abstract:
？采用共沉淀法制备了cu/zn/la/zro2催化剂,并浸渍k对其进行改性.以合成气合成异丁醇为探针反应,考察了焙烧温度对k-cu/zn/la/zro2催化剂合成反应的影响.采用xrd、tg、bet、nh3-tpd、h2-tpr、raman及xps等手段表征了催化剂的结构和表面性质.结果表明,催化剂体相结构、比表面积与其催化活性没有直接关系;催化剂表面强酸中心的存在不利于异丁醇的生成;cu-zn-zr活性组分间协同作用对催化剂活性影响很大,450℃焙烧温度下,cu-zn-zr活性组分间协同作用最强,cuo最容易还原,催化活性最高,此时co的转化率(物质的量)达到69.47%,醇中异丁醇的选择性(质量分数)为19.09%,甲醇+异丁醇的选择性(质量分数)为95.02%.
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