| 초록 |
The main goal of this project is the development of an economically viable process for production of hydrogen and elemental carbon via thermal decomposition (TD) of natural gas. The advantages of TD process can be summarized as follows: (1) It is technologically simple ; (2) Clean carbon is produced as a valuable byproduct; and (3) CO2 emissions from the process are reduced. The reactor temperature was maintained at 950-1300℃, reactor pressure was maintained at 1atm and flow of methane was maintained at 250 - 1500cc/min. In this work, effects of temperature and flow rate on CH4 conversion were measured , effects of temperature and flow rate on H2 concentration, and effects of temperature and residence time on H2 concentration. As the reaction temperature and the residence time were increased, hydrogen productivity and methane conversion rate were favorable. The thermodynamic equilibrium for methane pyrolysis was favored by lower preassure. Because of obtaining the highest hydrogen yield, an optimum temperature was 1300℃. TEM images showed that carbon black, pyrocarbon and carbonaceous material had all unique shape. |
