Chilled ammonia process for CO2 capture
Chilled ammonia process for CO2 capture
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DOI：
10.1016/j.egypro.2009.01.186
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发表时间：
2009-02
期刊：
影响因子：
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通讯作者：
F. Kozak;Petig Arlyn;E. Morris;R. Rhudy;D. Thimsen
中科院分区：
文献类型：
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作者：
F. Kozak;Petig Arlyn;E. Morris;R. Rhudy;D. Thimsen
冷冻氨工艺(CAP)可用于从燃煤锅炉和天然气联合循环(NGCC)系统排出的烟气中捕集二氧化碳，以及广泛的工业应用。在We Energy Pleasant草原发电厂进行的初步测试表明，CAP可以使用再生离子溶液连续吸收二氧化碳。We Energy工厂的设计目标是以设计速度每天捕获超过35吨二氧化碳。该设施的设计、安装和运营是阿尔斯通(工艺供应商)、EPRI(包括37个资助者)和We Energy之间的合作成果，阿尔斯通(工艺供应商)负责设计和建造试验台，EPRI(包括37个资助者)负责数据收集和工艺评估，We Energy负责提供运营公用事业并担任现场东道主。CAP是一种基于溶剂的可再生过程，它使用氨水溶液通过形成碳酸氢铵来捕获二氧化碳。重碳酸盐随后被加热以驱离二氧化碳，所产生的碳酸盐返回二氧化碳吸收系统以供重复使用。与基于胺的工艺相比，CAP的预期优势包括：再生能量更低，在压力下再生，能够用废热(未在We Energy测试)冷却来抵消低压蒸汽消耗，从而最大限度地减少吸收塔中的氨渗透。本文给出了WE能源场CAP工艺的初步运行结果。
The Chilled Ammonia Process (CAP) can be applied to capture CO2from flue gases exhausted from coal-fired boilers and natural gas combined cycle (NGCC) systems, as well as a wide variety of industrial applications. Initial tests conducted at the We Energies Pleasant Prairie Power Plant indicate that CAP can absorb CO2using regenerated ionic solution on a continuous basis. The We Energies facility is designed to capture over 35 tonnes/day of CO2at design rates. The facility was engineered, installed, and is being operated as a co-operative effort between Alstom (the process supplier) who engineered and constructed the pilot; EPRI (including 37 funders) who is conducting data collection and process evaluation; and We Energies who is providing operating utilities and is serving as the site host. The CAP is a solvent-based regenerable process that uses an aqueous ammonium solution to capture CO2by forming ammonium bicarbonate. The bicarbonate is subsequently heated to drive off the CO2with the resulting carbonate returned to the CO2absorption system for re-use. Anticipated advantages of the CAP over an amine-based process include: Lower energy for regeneration Regeneration at pressure Ability to offset LP steam consumption with reject heat (Not tested at We Energies) Cooling to minimize ammonia penetration from the absorber. Results from the initial operation of the CAP process at the We Energies site are presented in this paper.