【摘要】 本文采用XRD和TPR技术及固定床反应装置对第三组分改性的CuO-ZnO/HZSM-5催化剂的特性和合成气制二甲醚的催化性能进行考察.结果表明:通过对CuO-ZnO/HZSM-5添加第三组分金属氧化物,能有效的促进氧化锌的分散,同时也能够抑制催化剂在使用过程中活性中心的长大,另外,MnO2和ZrO2的加入,能加强活性中心与HZSM-5之间的相互作用,因而提高了催化剂的活性、选择性和稳定性.其中以MnO2改性的效果最好,其最佳含量为CuO/MnO2=10∶.1.更多还原

【Abstract】 Many characteristics of CuO-ZnO/HZSM-5 catalysts were compared by means of XRD and TPR techniques.The performance of syngas to DME was investigated by using fixed-bed reactor.Results showed that after adding ZrO₂、MnO₂、Al₂O₃ additives to CuO-ZnO/HZSM-5 catalyst,the degree of dispersion of active component was increased and the size of crystallite of active component was controlled when the catalyst was used.According to TPR,after adding ZrO₂、MnO₂ additives to CuO-ZnO/HZSM-5 catalyst,the interaction of active component and HZSM-5 was enhanced,so the catalyst activity was increased and the selectivity of DME was also improved.But the catalyst of adding MnO₂ was the best,the load of MnO₂ was CuO/MnO₂ equal to 10.更多还原