논문 상세보기
pp.943-962
Industrial gas drying, dilute gas mixtures purification, air fractionation, hydrogen production from steam reformers and petroleum refinery off-gases, etc are conducted by using adsorptive separation technology. The pressure swing adsorption (PSA) has certain advantages over the other methods, such as absorption and membrane, that are a low energy requirement and cost-effectiveness. A key component of PSA systems is adsorbents that should be highly selective to a gas being separated from its mixture streams and have isotherms suitable for the operation principle. The six standard types of isotherms have been examined in this review, and among them the best behavior in the adsorption of CO2 as a function of pressure was proposed in aspects of maximizing a working capacity upon excursion between adsorption and desorption cycles. Zeolites and molecular sieves are historically typical adsorbents for such PSA applications in gas and related industries, and their physicochemical features, e.g., framework, channel structure, pore size, Si-to-Al ratio (SAR), and specific surface area, are strongly associated with the extent of CO2 adsorption at given conditions and those points have been extensively described with literature data. A great body of data of CO2 adsorption on the nanoporous zeolitic materials have been collected according to pressure ranges adsorbed, and these isotherms have been discussed to get an insight into a better CO2 adsorbent for PSA processes.
1. 서 론
2. 재료 및 실험
3. 결과 및 고찰
3.1. 기체분자의 등온 흡착거동
3.2. 압력순환흡착 기술에 의한 기체의 흡착․분리
3.3. 압력순환흡착식 CO2 흡착분리용 흡착제
3.4. CO2 흡착분리용 압력순환흡착 공정에서 제올라이트계 흡착제의 working capacity
4. 결 론
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