中国化学工程学报（英文版）
中國化學工程學報（英文版）
중국화학공정학보（영문판）
CHINESE JOURNAL OF CHEMICAL ENGINEERING
2004年
3期
384-387
,共4页
祝一锋%李小年%季德春%刘化章
祝一鋒%李小年%季德春%劉化章
축일봉%리소년%계덕춘%류화장
ruthenium%catalyst%methanation%ammonia synthesis
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.
