fa گروه سرامیک Ceramic Materials and Engineering Research Paper Research Paper Iron and steel is an energy intensive industry and its contribution to the pollution of environment is considerable. Direct reduction iron (DRI) is a major element of an iron and steel production plant. Its share in natural gas and electricity consumption of total plant is estimated to be 70% and 15% respectively. Reduction gases are produced in natural gas reforming unit and its elements are CO and H2. A major consequence of using this technology is high level of CO2 emission, which pollutes the environment. An alternative to the existing technology is utilization of H2 as reducing agent. A comparison of various hydrogen production processes indicate that thermal decomposition of methane provides an attractive option from economical and technical point of view. Therefore, a system for producing hydrogen, based on thermal decomposition technique, has been designed in the framework of the present paper. THERMAL DECOMPOSITION OF METHANE, HYDROGEN PRODUCTION, MIDREX CARBON 9 15 http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1-59&slc_lang=fa&sid=1 HOMAYONIFAR P. 18003194753284600136 18003194753284600136 Yes SABOOHI Y. 18003194753284600137 18003194753284600137 No FIROUZ ABADI B. 18003194753284600138 18003194753284600138 No