Abstract
Methane decomposition reaction has been studied at three different activation temperatures (500 degrees C, 800 degrees C and 950 degrees C) over mesoporous alumina supported Ni-Fe and Mn-Fe based bimetallic catalysts. On co-impregnation of Ni on Fe/Al2O3 the activity of the catalyst was retained even at the high activation temperature at 950 degrees C and up to 180 min. The Ni promotion enhanced the reducibility of Fe/Al2O3 oxides showing higher catalytic activity with a hydrogen yield of 69%. The reactivity of bimetallic Mn and Fe over Al2O3 catalyst decreased at 800 degrees C and 950 degrees C activation temperatures. Regeneration studies revealed that the catalyst could be effectively recycled up to 9 times. The addition of O-2 (1 ml, 2 ml, 4 ml) in the feed enhanced substantially CH4 conversion, the yield of hydrogen and the stability of the catalyst. (c) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.