A Layout for the Carbon Capture with Aqueous Ammonia without Salt Precipitation

详细信息    查看全文

• 作者：Davide Bonalumi^a ; ^{davide.bonalumi@polimi.it" class="auth_mail" title="E-mail the corresponding author} ; Gianluca Valenti^a ; Stefano Lillia^a ; Philip L. Fosbø ; l^b ; Kaj Thomsen^b
• 关键词：CO2 capture ; carbon capture ; aqueous ammonia ; salt precipitation.
• 刊名：Energy Procedia
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：86
• 期：Complete
• 页码：134-143
• 全文大小：691 K

文摘

Post-combustion carbon capture technologies seem to be necessary to realize the CO₂ mitigation policies internationally shared for the next future, despite none of them appears to be ready for full-scale applications. This work considers the aqueous ammonia-based process for a coal-fired Ultra Super Critical power plant. Two layouts are simulated with Aspen Plus employing the recently recalibrated Extended UNIQUAC thermodynamic model. The first one operates at chilling conditions, which yield to salt precipitation, and is taken as reference because already analyzed in previous studies. The second layout operates at cooled conditions, which does not yield any salt precipitation. The Chilled layout reveals low specific heat duty and SPECCA equal to 2.2 and 2.86 MJ/kg_CO2, respectively. In contrast, the Cooled layout presents a higher specific heat duty of almost 3 MJ/kg_CO2 but, importantly, a lower SPECCA of 2.58 MJ/kg_CO2. The latter layout is a better choice also from the perspective of the plant operation since it does not present the salt precipitation.