Vapor-liquid equilibria of NH3 in (NH3+ H2O) and (NH3 + PZ + H2O) system

被引：13

作者：

Liu, Jinzhao ^{[2
]}

Wang, Shujuan ^{[2
]}

Hartono, Ardi ^{[1
]}

Svendsen, Hallvard F. ^{[1
]}

Kim, Inna ^{[3
]}

Chen, Changhe ^{[2
]}

机构：

[1] Norwegian Univ Sci & Technol, Dept Chem Engn, N-7491 Trondheim, Norway

[2] Tsinghua Univ, Minist Educ, Key Lab Thermal Sci & Power Engn, Dept Thermal Engn, Beijing 10084, Peoples R China

[3] SINTEF Mat & Chem, NO-7465 Trondheim, Norway

来源：

FLUID PHASE EQUILIBRIA | 2011年 / 311卷

基金：

中国国家自然科学基金;

关键词：

Ammonia; Piperazine; Vapor-liquid equilibrium; Activity coefficient; Modeling; CARBON-DIOXIDE; MASS-TRANSFER; ABSORPTION; THERMODYNAMICS; KINETICS; BINARY;

D O I：

10.1016/j.fluid.2011.08.017

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Volatility is an important issue for aqueous ammonia used as an absorbent for post-combustion CO2 capture. Vapor-liquid equilibrium (VLE) of NH3 in aqueous ammonia and aqueous blends of ammonia and piperazine (PZ) were measured at 20 degrees C, 30 degrees C and 40 degrees C. The experimental VLE results for NH3 cover the mole fraction ranges 2.5-15% NH3 (aq) in aqueous ammonia and 2.5-15% NH3 in the 0.4 M PZ blended solutions. Vapor pressures of NH3 for 5%, 10% and 15% NH3 (aq) were compared with available data in the literature. Activity coefficients for NH3 in NH3 (aq) and aqueous blends of NH3 + PZ were calculated and compared for different temperatures to obtain the effect of PZ on the volatility of aqueous ammonia. The eNRTL model was used to model the results and a comparison between model predictions and experimental data shows good agreement. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：30 / 35

页数：6

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