Methane decomposition reaction has been studied at three different activation temperatures（500℃,800℃ and950℃）over mesoporous alumina supported Ni–Fe and Mn–Fe based bimetallic catalysts.On co-impregnation of Ni...Methane decomposition reaction has been studied at three different activation temperatures（500℃,800℃ and950℃）over mesoporous alumina supported Ni–Fe and Mn–Fe based bimetallic catalysts.On co-impregnation of Ni on Fe/Al2O3the activity of the catalyst was retained even at the high activation temperature at 950℃ and up to180 min.The Ni promotion enhanced the reducibility of Fe/Al2O3oxides showing higher catalytic activity with a hydrogen yield of 69%.The reactivity of bimetallic Mn and Fe over Al2O3catalyst decreased at 800℃ and 950℃ activation temperatures.Regeneration studies revealed that the catalyst could be effectively recycled up to 9times.The addition of O2（1 ml,2 ml,4 ml）in the feed enhanced substantially CH4conversion,the yield of hydrogen and the stability of the catalyst.展开更多
目前正在欧洲核子中心(CERN)建造的LHC(L arge H adron Co llider)是世界上最大的加速器,它是一个具有高能量(7 T eV)大流强(0.53 A)的质子加速器。在它的直线节真空系统中,绝大部分的真空盒内表面将被镀上NEG薄膜。这样在又细又长的真...目前正在欧洲核子中心(CERN)建造的LHC(L arge H adron Co llider)是世界上最大的加速器,它是一个具有高能量(7 T eV)大流强(0.53 A)的质子加速器。在它的直线节真空系统中,绝大部分的真空盒内表面将被镀上NEG薄膜。这样在又细又长的真空盒里,当有束流通过时,NEG薄膜不仅可以作为分布式吸气剂泵使用,而且NEG薄膜还具有降低二次电子发射系数的作用,因此了解NEG薄膜的性能是很重要的。展开更多
基金the Deanship of Scientific Research at King Saud University for its funding this research group No.(RG-1436-119)
文摘Methane decomposition reaction has been studied at three different activation temperatures（500℃,800℃ and950℃）over mesoporous alumina supported Ni–Fe and Mn–Fe based bimetallic catalysts.On co-impregnation of Ni on Fe/Al2O3the activity of the catalyst was retained even at the high activation temperature at 950℃ and up to180 min.The Ni promotion enhanced the reducibility of Fe/Al2O3oxides showing higher catalytic activity with a hydrogen yield of 69%.The reactivity of bimetallic Mn and Fe over Al2O3catalyst decreased at 800℃ and 950℃ activation temperatures.Regeneration studies revealed that the catalyst could be effectively recycled up to 9times.The addition of O2（1 ml,2 ml,4 ml）in the feed enhanced substantially CH4conversion,the yield of hydrogen and the stability of the catalyst.
文摘目前正在欧洲核子中心(CERN)建造的LHC(L arge H adron Co llider)是世界上最大的加速器,它是一个具有高能量(7 T eV)大流强(0.53 A)的质子加速器。在它的直线节真空系统中,绝大部分的真空盒内表面将被镀上NEG薄膜。这样在又细又长的真空盒里,当有束流通过时,NEG薄膜不仅可以作为分布式吸气剂泵使用,而且NEG薄膜还具有降低二次电子发射系数的作用,因此了解NEG薄膜的性能是很重要的。
