Investigation of Mass-Transfer Performance for CO2 Absorption into Diethylenetriamine (DETA) in a Randomly Packed Column

被引：93

作者：

Fu, Kaiyun ^{[1
]}

Sema, Teerawat ^{[2
]}

Liang, Zhiwu ^{[1
,2
]}

Liu, Helei ^{[1
]}

Na, Yanqing ^{[1
]}

Shi, Huancong ^{[1
,2
]}

Idem, Raphael ^{[1
,2
]}

Tontiwachwuthikul, Paitoon ^{[1
,2
]}

机构：

[1] Hunan Univ, Dept Chem Engn, Joint Int Ctr Capture & Storage iCCS CO2, Changsha 410082, Hunan, Peoples R China

[2] Univ Regina, Fac Engn & Appl Sci, Int Test Ctr Capture ITC CO2, Regina, SK S4S 0A2, Canada

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 37期

基金：

中国国家自然科学基金; 加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

CARBON-DIOXIDE ABSORPTION; AQUEOUS-SOLUTIONS; KINETICS; CAPTURE; SOLUBILITY; 4-DIETHYLAMINO-2-BUTANOL; MONOETHANOLAMINE; ALKANOLAMINES; DEGRADATION; N2O;

D O I：

10.1021/ie300830h

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The mass-transfer performance of CO2 absorption into aqueous diethylenetriamine (DETA) solutions was investigated in an absorption column randomly packed with Dixon rings at 303-303 K and atmospheric pressure, and compared with that of monoethanolamine (MEA), which is widely considered as a benchmark solvent for CO2 absorption. The mass-transfer performance was presented in terms of volumetric overall mass-transfer coefficient (K(G)a(v)). In particular, the effects of operating parameters, such as inlet CO2 loading, solvent concentration, liquid flow rate, inert gas flow rate, and liquid temperature, were investigated and compared for both MEA and DETA. Over 40 runs of absorption experiments were carried out in this study. The results showed that K(G)a(v) of DETA was found to be higher than that of MEA. Also, inlet CO2 loading, solvent concentration, liquid flow rate, and liquid inlet temperature had significant effect on K(G)a(v) for both systems. However, the inert gas flow rate had an insignificant effect on K(G)a(v). Lastly, predictive correlations for K(G)a(v) for DETA-CO2 and MBA-CO2 systems in randomly Dixon ring packed columns were successfully developed. The predicted results were found to be in relatively good agreement with the experimental results, with average absolute deviations (AADs) of 16% and 14%, respectively.

引用

页码：12058 / 12064

页数：7

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