化学
水溶液
氨
波动性(金融)
哌嗪
摩尔分数
汽液平衡
热力学
无机化学
物理化学
有机化学
色谱法
物理
金融经济学
经济
作者
Jinzhao Liu,Shujuan Wang,Ardi Hartono,Hallvard F. Svendsen,Inna Kim,Changhe Chen
标识
DOI:10.1016/j.fluid.2011.08.017
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 °C, 30 °C and 40 °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.
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