Solubility of CO2 in Nonaqueous Absorption System of 2-(2-Aminoethylamine)ethanol + Benzyl Alcohol

详细信息    查看全文

• 作者：Chao Guo ; Shaoyun Chen ; Yongchun Zhang ; Guangbo Wang
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：June 12, 2014
• 年：2014
• 卷：59
• 期：6
• 页码：1796-1801
• 全文大小：344K
• 年卷期：v.59,no.6(June 12, 2014)
• ISSN：1520-5134

文摘

A mixture of 2-(2-aminoethylamine)ethanol (AEEA) with benzyl alcohol (BP) as absorbent was developed to reduce energy consumption in an amine-based CO₂ capture process. The solubility of CO₂ in the AEEA + BP solution was compared with AEEA + diethylene glycol (DEG), AEEA + triethylene glycol (TEG), and AEEA + H₂O. The CO₂ loading (mol CO₂/kg amine) at the same CO₂ partial pressure was in the order AEEA + H₂O > AEEA + BP > AEEA + TEG > AEEA + DEG, and CO₂ loading of all these solutions increased with increasing vapor pressure of CO₂. Besides, the CO₂ loading in AEEA + BP solution significantly decreased with increasing reaction temperature. The desorption rate of AEEA + BP solution was about 1.3 times faster than that of aqueous AEEA solution at the same desorption temperature, and AEEA + BP solution needed 30% time less than AEEA + H₂O solution to reach reaction end point. The AEEA + BP solution showed stable repeatability in four cycles of absorption鈥揹esorption tests.