燃焼排ガスからの二酸化炭素分離回収に対するPSAの適用性 [in Japanese] Application of PSA to Separation of Carbon Dioxide from Flue Gas [in Japanese]
Access this Article
Search this Article
本研究では, 燃焼排ガスからの二酸化炭素分離回収に対し, 圧力スイング吸着法 (PSA) の適用を検討した。システムとして, ドライベースで10%程度含まれる二酸化炭素をPSA単段で分離し, さらに後段で深冷分離法にて液化濃縮することを前提に, PSA入口および出口の二酸化炭素濃度, 回収率に対し吸着材の材料面およびPSA操作条件の両面について, その影響を調べた.<BR>ゼオライト13X系の吸着材を用い, PSA操作条件を最適化することにより, PSA単段で製品CO<SUB>2</SUB>濃度約70%, 回収率90%以上に到達することを明らかにした.また, 後段の深冷分離プロセスにおいて, オフガスをPSA入口に還元することで, 最終製品濃度99%以上, 回収率も90%を越えるシステムが構築できることを確認した.
The application of pressure swing adsorption (PSA) method to CO<SUB>2</SUB> separation from Hue gas was examined. The main process was comprised of PSA and a super cold separator. Carbon dioxide, which present in about 10% concnetration in flue gas, was initially concentrated by PSA, and then the concentrated CO<SUB>2</SUB> was liquefied by the super cold separator (condenser) up to a concentration of more than 99%. The objectives of this study were (1) to make clear the effect of absorbent on the PSA performance, and (2) to make clear the suitable PSA operation condition with high CO<SUB>2</SUB> concentration and its high recovery.<BR>In this study, a zeolite 13X adsorbent in the PSA system was useful for CO<SUB>2</SUB> separation from artificial flue gas. By optimization of PSA operation conditions, the product from PSA showed a CO<SUB>2</SUB> concentration of ca.70%and recovery was more than 90%.In addition, the final product of the process showed CO<SUB>2</SUB> concentration of ca. 99% and recovery of ca.90%, when the off-gas from the condenser was introduced into the inlet of PSA and the operation conditions of the process were optimized.
- Chemical engineering
Chemical engineering 23(2), 149-156, 1997-03-10
The Society of Chemical Engineers, Japan