LICP OpenIR  > 羰基合成与选择氧化国家重点实验室(OSSO)
Effect of Different Supports on Physical and Chemical Properties and Catalytic Activity over Ba-Ru /MgO Ammonia Synthesis Catalysts
Department羰基合成与选择氧化国家重点实验室
Yang XL(杨晓龙); Tang LP(唐立平); Xia CG(夏春谷); Xiong XM(熊绪茂); Mu XY(慕新元); Hu B(胡斌)
2012
Source Publication分子催化
ISSN1001-3555
Volume26Issue:1Pages:1-9
AbstractMgO supports were prepared by different precipitants and further examined as the supports for barium-promoted ruthenium catalyst for ammonia synthesis.The reason resulting in their difference of catalytic activity were explored by X-ray diffraction,N2 adsorption-desorption,X-ray fluorescence spectroscopy,transmission electron microscopy,H2 temperature-programmed reduction,CO2 temperature-programmed desorption,H2 temperature-programmed desorption and N2 temperature-programmed desorption.It was found that MgO prepared by (NH4)2CO3 precipitant facilitated the reduction of ruthenium oxide for Ba-Ru/MgO catalyst,and the weak basic sites of Ba-Ru/MgO (NH4)2CO3 as precipitant) appeared at lower temperature and showed higher weak basic site densities compared with the others. At 450 ℃、5.0 MPa and 5 000 h-1,catalytic activity of Ba-Ru/MgO catalyst employing (NH4)2 CO3 as the precipitant was higher than that of the catalyst prepared by other precipitants under the same reaction conditions,the ammonia concentration in the effluent reached 3.74%. The addition of Ba promoter significantly decreased the amount of hydrogen chemisorption,increased the number of dissociatively adsorbed N* on the Ru surface and thus accelerated the reaction rate of ammonia synthesis.
KeywordAmmonia Synthesis Ruthenium Catalyst Precipitants Basic Site 氨合成 钌催化剂 沉淀剂 碱性位
Subject Area物理化学
Funding Organizationthe National Science Foundation for Distinguished Young Scholars of China (20625308)
Indexed ByCSCD
Language英语
Funding Project羰基金属功能材料研究组 ; 均相催化研究组
Citation statistics
Document Type期刊论文
Identifierhttp://ir.licp.cn/handle/362003/3926
Collection羰基合成与选择氧化国家重点实验室(OSSO)
Corresponding AuthorHu B(胡斌)
Recommended Citation
GB/T 7714
Yang XL,Tang LP,Xia CG,et al. Effect of Different Supports on Physical and Chemical Properties and Catalytic Activity over Ba-Ru /MgO Ammonia Synthesis Catalysts[J]. 分子催化,2012,26(1):1-9.
APA 杨晓龙,唐立平,夏春谷,熊绪茂,慕新元,&胡斌.(2012).Effect of Different Supports on Physical and Chemical Properties and Catalytic Activity over Ba-Ru /MgO Ammonia Synthesis Catalysts.分子催化,26(1),1-9.
MLA 杨晓龙,et al."Effect of Different Supports on Physical and Chemical Properties and Catalytic Activity over Ba-Ru /MgO Ammonia Synthesis Catalysts".分子催化 26.1(2012):1-9.
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