Modeling Energy Flow in an Integrated Pollutant Removal (IPR) System with CO2 Capture Integrated with Oxy-fuel Combustion

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• 作者：Sivaram Harendra ; Danylo Oryshcyhn ; Stephen Gerdemann ; Thomas Ochs ; John Clark
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：November 15, 2012
• 年：2012
• 卷：26
• 期：11
• 页码：6930-6937
• 全文大小：400K
• 年卷期：v.26,no.11(November 15, 2012)
• ISSN：1520-5029

文摘

Oxy-coal combustion is one of the technical solutions for mitigating CO₂ in thermal power plants. Many processes have been evolved in past the decade to capture CO₂ from process industries. Researchers at the National Energy Technology Laboratory (NETL) have patented a process, integrated pollutant removal (IPR), that uses off the shelf technology to produce a sequestration-ready CO₂ stream from an oxy-combustion power plant. The IPR process as it is realized at the Jupiter Oxygen Burner Test Facility is a spray tower (direct-contact heat exchanger) followed by four stages of compression with intercooling. To study the energy flows of the oxy-combustion process, a 15 MW_th oxy-combustion pulverized-coal-fired plant integrated with the IPR system was simulated and analyzed using ASPEN Plus and ASPEN energy analyzer. This paper discusses flue-gas recycle, energy flow, recovery, and optimization of IPR systems. ASPEN models of heat- and mass-transfer processes in a flue-gas-condensing heat-exchanger system were developed to predict the heat transferred from flue gas to cooling water. The flue-gas exit temperature, cooling water outlet temperature, and energy flows of IPR streams were computed using ASPEN models. Pinch principles are deployed for targeting design and operation-guiding purposes and balancing the heat and mass transfer in the IPR system. The results are expected to support sophistication of the IPR system design, improving its application in a variety of settings. They open the door for valuable IPR efficiency improvements and generalization of methodology for simultaneous management of energy resources.