摘要
利用共沉淀法制备了Cu O-Zn O-ZrO_2催化剂,考察了加料方式、焙烧温度和沉淀剂种类对Cu O-Zn O-ZrO_2催化剂结构性能的影响。通过XRD、H_2-TPR、BET等方法对所制备的催化剂进行了表征,选择较佳制备条件下制得的Cu O-Zn O-ZrO_2催化剂进行了液相丙烯低温脱除CO活性评价。结果表明:采用并流方式,焙烧温度为400℃,以(NH_4)_2CO_3为沉淀剂所制备的催化剂具有较大的BET比表面积,更小的活性组分晶体颗粒,以及较好的氧化还原性能。在反应温度为50℃,压力为3MPa,体积空速为8.0 h^(-1)的条件下,连续反应1 500 min,较佳制备条件制得的Cu O-Zn O-ZrO_2催化剂在液相丙烯杂质脱除中,10μL/L CO转化率均在99.7%以上,稳定性良好。
CuO-ZnO-ZrO2 catalyst is prepared by precipitation method and characterized by XRD, H2-TPR and BET. The effect of preparation conditions including feeding sequence, calcination temperature and precipitating agent on the catalyst textural characteristics are investigated. When CuO-ZnO-ZrO2 catalyst is prepared under the following conditions ：70： 15：15 mass ratio of CuO, ZnO and ZrO2, co-current precipitation method,400℃ of calcination temperature and （NH4 ）2CO3 as precipitating agent, higher BET surface area, smaller CuO crystal particle and better redox features can be achieved. Moreover, CO conversion in liquid-phase propylene with 10 μL/L of CO can reach above 99.75% when it is catalyzed by CuO-ZnO-ZrO2 prepared under 50℃ and 3 MPa,with 8.0 h -1 of volume space velocity and continuous reaction for 1500 minutes ,indicating good stability.
出处
《现代化工》
CAS
CSCD
北大核心
2016年第2期67-71,共5页
Modern Chemical Industry
基金
上海市自然科学基金项目(15ZR1421500)
