Essay --

It should be necessary to provide enthalpy in an enormous union at a great price. However, it is viable to accept if hydrogen is produced without light speedic acid gas emission because CO2 elimination is energy demanding and costly run think with environment problem, such as greenhouse effect. Unfortunately, currently conventional outgrowth of hydrogen product is the steam reforming process which has highly CO2 emission. Currently, just about 48 % of hydrogen derives from natural 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 production derives from fogey associated with a huge amount of CO2 emission. just 4 % of hydrogen production is come from urine electrolysis.4 It also pass judgment that hydrogen production without CO2 technologies be the great wish for the prospective of a sustainable hydrogen economy.Zero CO2 emissions are possible when the raw material s are from renewable source such as bio-gas. For instance, pee electrolysis with renewable electricity and thermo-chemical cycle processes utilize 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 spiritual rebirth 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 efficient 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 throttle valve deactivation problem related with the carbon, which come from methane decomposition, can be cover on the gas emerge. Therefore, it needs the burning process17 or gasif ying 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 spin-off. So, on that point have been researched the concurrent 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 method to the production of hydrogen and carbon. Carbon is precious byproduct of the thermal-catalytic process. It could reduce the cost of hydrogen production.