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《Chinese Journal of Catalysis》 2007-05
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Catalytic Performance of Ru Catalyst Supported on Ba-Doped Nano-Magnesia Prepared by Ultrasonic Method for Ammonia Synthesis

HUO Chao,YAN Gang,ZHENG Yifan,YU Fengwen,LIU Huazhang(College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310032,Zhejiang,China)  
Ba-doped nano-magnesia(Ba-MgO) was prepared by the chemical co-precipitation method using ultrasonic technique,and a Ru catalyst was prepared using this Ba-doped nano-magnesia as the support and Ru3(CO)12 as the Ru precursor by impregnation.The catalyst was characterized by field-emission scanning electron microscopy,X-ray diffraction,and N2 physical adsorption.The Ba-doped nano-magnesia treated with ultrasonic wave has large surface area and regular porosity,and Ba was uniformly dispersed in the support.The activity of the Ru catalyst for ammonia synthesis was evaluated under the conditions of 10 000 h-1,10.0 MPa,and 400-450 ℃.With the promotion of Ba,the Ru catalyst supported on Ba-MgO showed high activity.When the nano-magnesia was treated with ultrasonic wave for 30 min,the reaction rate of ammonia synthesis over 4%Ru/Ba-MgO reached 61.02 mmol/(g·h) under the conditions of 10.0 MPa,425 ℃,and 10 000 h-1.
【Fund】: 国家自然科学基金(20203016);; 浙江省自然科学基金(Y406294)
【CateGory Index】: O643.32;TQ113.2
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