Ni/Mn based catalyst for methane decomposition to hydrogen and carbon nano tube: the effect of temperature and space time

Hydrogen production is of great significance on seeking a better way to use natural gas resources. If an efficient means of converting natural gas to hydrogen were developed, natural gas would take on new value. The catalytic activities and lifetimes of Ni/Mn-based catalyst using different temperature (600-850 degree C) and gas hourly space velocity (GHSV) (650, 1300 and 2700 h-1) for methane decomposition showed that the deactivation was affected by diffusion phenomena in the particle-carbon system and is determined by the rate ratio of formation of carbon atoms to their diffusion toward the deposition sites. At 850 degree C and GHSV of 650 h-1, the yield of hydrogen was 84%