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Gas Separation and Recovery of SF6 from SF6/N2 Gas Mixtures using Polymer Membrane Osamu Yamamoto, Member (Kyoto University), Kuniharu Hashimoto, Member (KEPCO), Tadasu Takuma, Member (Kyoto University), Toshio Sonoda, Member (KEPCO), Akira Kawamura, Member (Kyoto University), Yuuichi Katoh, Member (KEPCO), Masayuki Kinouchi, Non-member (Ube Ind. Ltd.) SF6 gas recovery is considered one of the most serious issues when we utilize a gas mixture at low SF6 content as an insulating medium for electric power apparatus. Liquefaction recovery is difficult to apply due to the increased recovery loss when SF6 content becomes low. We have examined a method using membrane separator, which utilizes the difference in permeation rate of component gases. This paper reports experimental results on concentration of SF6 in the recovered gas, recovery loss, and so on, for gas mixtures composed of SF6 and N2. It describes the effect of various parameters, such as gas flow, temperature, mixing ratio and gas pressure. The paper also discusses limits of allowable recovery loss and recovery speed when the method is applied into practice. The experimental results show the effectiveness of this method for SF6 gas separation and recovery from gas mixtures with low SF6 contents.

denki gakkai rombunshi. b, denryoku, enerugi bumonshi/denki gakkai rombunshi. b, denryoku, enerugī bumonshi

Gas Separation and Recovery of SF&lt;sub&gt;6&lt;/sub&gt; from SF&lt;sub&gt;6&lt;/sub&gt;/N&lt;sub&gt;2&lt;/sub&gt; Gas Mixtures using Polymer Membrane