| 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)
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| 2012 | |
| Source Publication | 分子催化
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| ISSN | 1001-3555 |
| Volume | 26Issue:1Pages:1-9 |
| Abstract | MgO 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． |
| Keyword | Ammonia 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 Organization | the National Science Foundation for Distinguished Young Scholars of China (20625308) |
| Indexed By | CSCD |
| 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 |
| Identifier | http://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 Author | Hu 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. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| B87.分子催化, 2012, 26 (（1191KB） | 开放获取 | CC BY-NC-SA | View Application Full Text | |||
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