| Summary: | 碩士 === 國立中央大學 === 化學工程與材料工程學系 === 103 === With the development of industry, the environmental impact caused by plant emissions has become more seriously. It is also an important issue to deal with exhaust gas for reducing damage.
Nitrous oxide (N2O), known as laughing gas, is one of the factory emissions and a kind of greenhouse gases. Nitrous oxide will also harm the health, if someone breathes it frequently. So cutting down factory emissions of nitrous oxide is the goal of the study.
Pressure Swing Adsorption (PSA) is a process which can separate gas mixtures because adsorbates have different adsorption capability toward adsorbent. Based on the property of adsorption at high pressure and desorption at low pressure, we can choose the appropriate processes to achieve the desired separation.
First, this study obtained adsorption equilibrium data of pure N2O, O2 and N2 on UOP zeolite 5A by using Micro-Balance Thermo D-200. Then, breakthrough experiments were performed with single column in different operating conditions (feed pressure and feed flow rate) to observe their influence. In the end of the study, we separated gas mixtures by single-bed four-step PSA process. The feed compositions are 10% N2O, 18.9% O2 and 71.1% N2. The influence of operation variables were obtained by assessing different operating conditions. In other to study how to treat the exhaust gas comprising nitrous oxide.
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