| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程研究所 === 99 === Global warming has become more and more serious, which is caused by greenhouse gases. Cutting down the emission of CO2 has already become the major research target in the world. 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. Pressure swing adsorption can purify hydrogen with high concentration to be used as energy source and recover carbon dioxide to decrease the impact on the greenhouse effect.
Pressure swing adsorption is a cyclic process to separate gas mixtures based on the difference of adsorption capacity of each component on adsorbent. This technology consists of gas adsorption at high pressure and desorption at low pressure to produce high-purity product.
This study plans to use dual-bed PSA process to separate high purity hydrogen and to capture CO2 from syngas, which contains CO, CO2 and hydrogen, at room temperature. The optimal operating condition is discussed by varying the operating variables, such as feed pressure, length of adsorber and step time. By PSA process, the goal of energy generation and environmental protection could be achieved at the same time.
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