Experimental Study of Regeneration Performance of Aqueous N,N-Diethylethanolamine Solution in a Column Packed with Dixon Ring Random Packing

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• 作者：Bin Xu ; Hongxia Gao ; Menglin Chen ; Zhiwu Liang ; Raphael Idem
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：August 10, 2016
• 年：2016
• 卷：55
• 期：31
• 页码：8519-8526
• 全文大小：382K
• 年卷期：0
• ISSN：1520-5045

文摘

Carbon dioxide (CO₂) stripping from CO₂-loaded aqueous N,N-diethylethanolamine solution (DEEA) was comprehensively investigated in a laboratory scale regeneration column packed with Dixon ring random packing. The regeneration heat duty (Q_reb) of DEEA was evaluated as a function of various operating parameters, including rich CO₂ loading, lean CO₂ loading, solution flow rate, feed temperature, and DEEA concentration, as well as synergistic parameters (e.g., Δα × L and C × L). The experimental results showed that the Q_reb was sensitive to these operating parameters. For example, the Q_reb decreased significantly as the lean CO₂ loading, rich CO₂ loading, and DEEA concentration increased, indicating that the Q_reb can be reduced by adjusting these operating parameters. In addition, CO₂-loaded aqueous DEEA solution was observed to have a lower Q_reb (of 2.17 GJ/t CO₂) as compared to those of aqueous MEA and DETA solutions. Based on heat duty alone, DEEA can be considered to be an attractive solvent for amine-based postcombustion CO₂ capture.