【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 synthe
【机 构】
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Zhejiang Key Laboratory of Green-Chemistry Synthesis Technology
论文部分内容阅读
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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