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《Journal of Zhejiang University of Technology》 2008-01
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Study on impregnation mechanism and condition of Ru/AC ammonia synthesis catalyst

ZHU Yi-feng1,2,ZHOU Chun-hui1,GAO Dong-mei1,LIU Hua-zhang1(1.College of Chemical Engineering & Materials Science,Zhejiang University of Technology,Hangzhou 310032,China;2.West Branch of Zhejiang University of Technology,Quzhou 324000,China)  
The ruthenium catalyst supported on active carbon(Ru/AC) was prepared by impregnation technology.Ammonia synthesis over the catalyst was performed under the condition of 10 MPa,400~425 ℃,and space velocity of 10 000 h-1 with synthesis gas of V(N2)∶V(H2)=1∶3.The effects of various factors on the activity and Ru dispersion were studied through the analyses of the preparation technology and property of Ru catalyst.It was found that during the soak adsorption,rate-determining step was Ru colloid particles diffusion.In order to attain good catalyst,the suitable pH range of the RuCl3 aqueous was 0.4~1.04,and the impregnation time of 18 h were needed.During the impregnation,there was little impregnation effect by increasing impregnation step-program or by adding competitive adsorbate.
【Fund】: 中国石油化工总公司资助项目(499051)
【CateGory Index】: TQ113.2
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