研究期間：10108~10207;Because global warming has become more and more serious, which are caused by greenhouse gases, cutting down the emission of CO2 has already become one of the major research topics in the world. Several ways including physical, chemical and biological methods are studied to capture CO2 before it emits to atmosphere, such as chemical absorption, pressure swing adsorption (PSA), membrane separation, refrigeration/cryogenic etc. PSA performs better in saving energy and wouldn’t cause the second pollution problem, so it has been used widely in gas separation. The main sources of CO2 include the processes of generating electric power and producing hydrogen from natural gas and hydrocarbon. The CO2 which comes from coal is generated by gasifier and the water-gas-shift-reaction step of the process. The syngas after gasifier and water-gas-shift-reaction is cooled downed to remove water and to capture CO2 first in current technology, before the rest gas is heated again for power generation. However, the steps of cooling and heating cause the waste of energy. Besides, separating CO2 and H2 from syngas with moisture is difficult to achieve at the same time due to the strong adsorption of water. This study plans to use PSA process to directly separate high purity hydrogen and to capture CO2 from syngas at mid-high temperature under the condition of containing moisture, which contains water vapor, CO, CO2 and H2. By PSA process, the goal of energy generation and environmental protection could be achieved at the same time.
