| 抑制碳负载钌基氨合成催化剂甲烷化的研究 |
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| 引用本文： | 祝一锋, ,李小年, ,季德春, ,刘化章. 抑制碳负载钌基氨合成催化剂甲烷化的研究[J]. 中国化学工程学报, 2004, 12(3): 384-387 |
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| 作者姓名： | 祝一锋 李小年 季德春 刘化章 |
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| 作者单位： | ZhejiangKeyLaboratoryofGreen-ChemistrySynthesisTechnology,InstituteofCatalysis,ZhejiangUniversityofTechnology,Hangzhou310032,China |
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| 基金项目： | 浙江省自然科学基金，教育部优秀青年教师资助计划，浙江省新世纪151人才工程项目 |
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| 摘 要： | The effects of promoters K, Ba, Sm on the resistance to carbon-methanation and catalytic activity of ruthenium supported on active carbon (Ru/AC) for ammonia synthesis have been studied by means of TG-DTG (thermalgravity-differential thermalgravity), temperature-programmed desorption, and activity test. Promoters Ba,K, and Sm increased the activity of Ru/AC catalysts for ammonia synthesis significantly. Much higher activity can be reached for Ru/AC catalyst with bi- or tri-promoters. Indeed, the triply promoted catalyst showed the highest activity, coupled to a surprisingly high resistance to methanation. The ability of resistance of promoter to methanation of Ru/AC catalyst is dependent on the adsorption intensity of hydrogen. The strong adsorption of hydrogen would enhance methanation and impact the adsorption of nitrogen, which results in the decrease of catalytic activity.
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| 关 键 词： | 甲烷化 接触反应 反应活性 Ru／AC 氨合成法 钌 催化剂 |
| 修稿时间： | |
Study on the carbon-methanation and catalytic activity of Ru/AC for ammonia synthesis |
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| ZHU Yifeng,LI Xiaonian,JI Dechun,LIU Huazhang. Study on the carbon-methanation and catalytic activity of Ru/AC for ammonia synthesis[J]. Chinese Journal of Chemical Engineering, 2004, 12(3): 384-387 |
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| Authors: | ZHU Yifeng LI Xiaonian JI Dechun LIU Huazhang |
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| Affiliation: | Zhejiang Key Laboratory of Green-Chemistry Synthesis Technology,Institute of Catalysis,Zhejiang University of Technology,Hangzhou 310032,China;Zhejiang Key Laboratory of Green-Chemistry Synthesis Technology,Institute of Catalysis,Zhejiang University of Technology,Hangzhou 310032,China;Zhejiang Key Laboratory of Green-Chemistry Synthesis Technology,Institute of Catalysis,Zhejiang University of Technology,Hangzhou 310032,China;Zhejiang Key Laboratory of Green-Chemistry Synthesis Technology,Institute of Catalysis,Zhejiang University of Technology,Hangzhou 310032,China |
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| Abstract: | The effects of promoters K,Ba,Sm on the resistance to carbon-methanation and catalytic activity of ruthenium supported on active carbon(Ru/AC)for ammonia synthesis have been studied by means of TG-DTG(thermalgravity-differential thermalgravity),temperature-programmed desorption,and activity test.Promoters Ba,K,and Sm increased the activity of Ru/AC catalysts for ammonia synthesis significantly.Much higher activity can be reached for Ru/AC catalyst with bi- or tri-promoters.Indeed,the triply promoted catalyst showed the highest activity,coupled to a surprisingly high resistance to methanation.The ability of resistance of promoter to methanation of Ru/AC catalyst is dependent on the adsorption intensity of hydrogen.The strong adsorption of hydrogen would enhance methanation and impact the adsorption of nitrogen,which results in the decrease of catalytic activity. |
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| Keywords: | ruthenium catalyst methanation ammonia synthesis |
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