Essay --

It should be needed to provide heat content in an enormous amount at a great price. However, it is possible to accept if atomic number 1 is produced without carbonic acid turgidity emission because CO2 elimination is energy demanding and embodyly process related with environment riddle, much(prenominal) as greenhouse effect. Unfortunately, currently conventional process of heat content exertion is the steam reforming process which has highly CO2 emission. Currently, approximately 48 % of enthalpy derives from innate(p) gas by steam reforming process, 30 % from oil reforming in the chemical manufacturing and 18 % from coal gasification.3 It replies that 96 % of the hydrogen end product derives from fossil associated with a huge amount of CO2 emission. Only 4 % of hydrogen production is come from water electrolysis.4 It also expected that hydrogen production without CO2 technologies atomic number 18 the great wish for the future of a sustainable hydrogen economy.Zero CO2 e missions are possible when the raw materials are from renewable source such as bio-gas. For instance, water electrolysis with renewable electricity and thermo-chemical cycle processes development renewable heat are the representative hydrogen production without CO2 emission.5, 6 However, the cost of hydrogen production using renewable processes is currently prohibitive cost. Thus, a changeover to a hydrogen economy would probably start with hydrogen produced from fossil fuels, especially natural gas (NG). Steam reforming of natural gas process is the most businesslike and generally used process for the hydrogen production in commercial field.7 Steam reforming process is basically the transformation of methane and water to hydrogen gas and carbon oxides, and has two main reactions, as shown in Fig. X7 Synthesis gas genera... ...ches have a particle accelerator deactivation problem related with the carbon, which come from methane decomposition, can be covered on the catalyst su rface. Therefore, it needs the burning process17 or gasifying with steam18 for removing carbon on the catalyst surface. However, gasification or combustion of carbon residues on the catalyst surface causes to produce a huge amount of CO2 as byproduct. So, there have been researched the synchronic production of hydrogen and nanostructured carbon by Ni-and Fe- catalyst for decomposition of methane.19, 20 Also, another group reported the possibility of using carbon materials as catalyst for thermal decomposition.21, 22 They reported carbon catalyst is an environment-friendly mode to the production of hydrogen and carbon. Carbon is precious byproduct of the thermal-catalytic process. It could reduce the cost of hydrogen production.