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Study of new reduction method of Cu zeolites and its characterization of Cu species

LI Cui hua 1,SHI Qi hong 2,ZHANG Xin yuan 2 (1.Institute of Chemistry and Engineering,Chinese University of Science and Technology Hefei 230026;2.Institute of Science,Shantou University,Shantou 515011)  
Purified Cu +/β can be conveniently prepared from Cu 2+ /zeolites by ammonia adsorption followed by CO reduction during 367~393K. TPR,XPS,FT IR characterization results show that all Cu 2+ are completely reduced to Cu + without any formation of Cu 0. Comparision of TPR study between the new reduction method and the generally used methods such as reduction by H 2 or CO,it is found that the new one can overcome the disadvantages which there co exist Cu 2+ or Cu 0 in the Cu +/β zeolites.In addition,it can use lower grade of reduction gas and lower temperature,and consumes less CO gas,which make the method easily to be applied in experiment study and industrial application.
【Fund】: 国家自然科学基金! (2 90 32 6 7) ;; 清华大学一碳化工国家重点实验室和汕头大学工业催化学科“2 11 工程”项目
【CateGory Index】: TQ424
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