WANG Dongsheng, TAN Yisheng, HAN Yizhuo, Noritatsu TSUBAKI. 浆态床合成二甲醚复合催化剂失活原因探索[J]. Journal of Fuel Chemistry and Technology, 2008, 36(02): 176-180.
Citation:
WANG Dongsheng, TAN Yisheng, HAN Yizhuo, Noritatsu TSUBAKI. 浆态床合成二甲醚复合催化剂失活原因探索[J]. Journal of Fuel Chemistry and Technology, 2008, 36(02): 176-180.
WANG Dongsheng, TAN Yisheng, HAN Yizhuo, Noritatsu TSUBAKI. 浆态床合成二甲醚复合催化剂失活原因探索[J]. Journal of Fuel Chemistry and Technology, 2008, 36(02): 176-180.
Citation:
WANG Dongsheng, TAN Yisheng, HAN Yizhuo, Noritatsu TSUBAKI. 浆态床合成二甲醚复合催化剂失活原因探索[J]. Journal of Fuel Chemistry and Technology, 2008, 36(02): 176-180.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China; 2.Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; 3.Toyama University, Toyama 9308555, Japan
Deactivation of composite catalyst for onestep dimethyl ether (DME) synthesis in slurry reactor was studied under reaction conditions of 260℃ and 5.0MPa. It was found that instability of Cubased methanol synthesis catalyst led to rapid deactivation of the composite catalyst. Deactivation rate of the Cubased catalyst in slurry reactor was compared with that in fixedbed reactor. The results indicated that harmfulness of water, which is formed in the synthesis of DME, caused the Cubased catalyst to deactivate at a high rate in slurry reactor. Techniques of TPR, XRD, and SEMEDS were used to characterize the reduction behaviors, crystal structures, and surface properties of the catalyst. The results showed that carbon deposition and grain growth of Cu were important reasons for the rapid deactivation of the Cubased catalyst, and no obvious metal loss of Cu was found.