Mass Transfer Coefficients for CO2 Absorption into Aqueous Ammonia Using Structured Packing

Mass Transfer Coefficients for CO2 Absorption into Aqueous Ammonia Using Structured Packing
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使用规整填料将 CO2 吸收到氨水中的传质系数

DOI:
10.1021/ie403097h
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发表时间:
2014-03
期刊:
Industrial & Engineering Chemistry Research
影响因子:
--
通讯作者:
Tang, Zhongli
Tang, Zhongli
中科院分区:
其他
文献类型:
--
作者:
Li, Wenbin;Zhao, Xingjian;Liu, Botan;Tang, Zhongli

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在本研究中,测量了CO2吸收到氨水溶液中的气相体积总传质系数(KGae),以探索结构填料填充柱的传质性能。在气体流量1400 ~ 2300 m3·m-2·h-1、液体流量20 ~ 39 m3·m-2·h-1、CO2分压高达8 kPa、氨浓度0.27 ~ 0.72 kmol·m-3的主要操作变量范围内对KGae值进行了评估。结果表明,较高的液量和氨水浓度有利于提高KGae值。相反,KGae值随着CO2分压的增大而减小。结果还表明,气载对KGae的影响不大。为了使传质数据易于利用,开发了该系统的经验KGae相关性。最后,利用目前发展的计算传质模型,对CO2在氨水溶液中的吸收进行了模拟。
In this study, the gas phase volumetric overall mass transfer coefficients (KGae) for CO2 absorption into aqueous ammonia solutions were measured to explore the mass transfer performance of a column packed with structured packing. The KGae values were evaluated over ranges of main operating variables, that are, 1400–2300 m3·m–2·h–1 gas flow rate, 20–39 m3·m–2·h–1 liquid flow rate, up to 8 kPa partial pressure of CO2, and 0.27–0.72 kmol·m–3 ammonia concentration. The results show that higher liquid loading and concentration of aqueous ammonia are beneficial to enhance the KGae values. On the contrary, KGae value decreases as the CO2 partial pressure increases. The results also show that gas loading has little influence on KGae. To allow the mass transfer data to be readily utilized, an empirical KGae correlation for this system was developed. Finally, Simulations were made for the absorption of CO2 into aqueous ammonia solutions by using the currently developed computational mass transfer model along with ...
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