| 초록 |
Hydrogen (H2) has drawn an increasing attention as an alternative energy carrier because it produces minimal pollutant emissions during conversion to other energy forms and has higher energy density than conventional fossil fuels. The mass production of H2 are based on the catalytic gasification of biomass owing to maturity of the technology and favorable economics, but H2 produced from gasification of the biomass feedstock contains a large amount of impurities. In order to utilize H2 as an alternative energy carrier, one important criteria to consider is to separate H2 from the mixture gas. As methods for H2 purification, sorption-enhanced reaction concept, in which catalytic reaction and carbon dioxide removal by sorption are carried out simultaneously, has been applied to several processes and high-purity H2 can be directly produced from a single reactor. In addition, dense metal membranes have been studied and developed to purify H2. In this study, we introduce experimental results of sorption-enhanced reactions and H2 selective membranes for high-purity H2 production, and discuss how these technologies can be applied to industrial processes. |
