Optimization of One- and Two-Staged Kinetically Controlled CO2 Capture Processes from Postcombustion Flue Gas on a Carbon Molecular Sieve

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• 作者：Reza Haghpanah ; Arvind Rajendran ; Shamsuzzaman Farooq ; Iftekhar A. Karimi
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：June 4, 2014
• 年：2014
• 卷：53
• 期：22
• 页码：9186-9198
• 全文大小：641K
• 年卷期：v.53,no.22(June 4, 2014)
• ISSN：1520-5045

文摘

In this study, we systematically evaluate vacuum swing adsorption (VSA) processes for the kinetic separation of CO₂/N₂ from dry postcombustion flue gas on carbon molecular sieve by performing rigorous optimization. The synthesized VSA configurations are assessed first for their ability to produce high purity of CO₂ at high recovery. A one-stage heavy reflux cycle and a two-stage process with an enriching VSA followed by a polishing VSA, both operated as basic four-step cycles with light product pressurization, are able to meet the purity-recovery constraints. These configurations are then optimized to minimize energy consumption and maximize productivity, and their energy-productivity Paretos are compared. General guidelines for purity-recovery targets in the first stage of a two-stage process are also discussed. The analysis also shows that the performance of zeolite 13X is superior to carbon molecular sieve.