Effects of chemical absorption on mass transfer from single carbon dioxide bubbles in aqueous sodium hydroxide solution in a vertical pipe
Effects of chemical absorption on mass transfer from single carbon dioxide bubbles in aqueous sodium hydroxide solution in a vertical pipe
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DOI：
10.1016/j.ces.2021.116852
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发表时间：
2021-06
影响因子：
4.7
通讯作者：
D. Sa’adiyah;Y. Matsuo;M. Schlüter;Ryo Kurimoto;Kosuke Hayashi;A. Tomiyama
中科院分区：
文献类型：
--
作者：
D. Sa’adiyah;Y. Matsuo;M. Schlüter;Ryo Kurimoto;Kosuke Hayashi;A. Tomiyama
以氢氧化钠水溶液为介质，研究了垂直管内单气泡二氧化碳化学吸收的传质速率。溶液的pH值在12至13.15之间变化。管道直径D为12.5mm。气泡直径在0.4 <d/D< 1.4范围内变化，以覆盖不同形状的气泡。当pH < 12.25时，增强因子E几乎为1。当pH > 12.25时，E随pH的增加而增加。然而，它的大小低于双膜理论的估计。建立了相关性。将E关联式与无化学吸收气泡的舍伍德数关联式相结合，得到了对有化学吸收气泡的舍伍德数的较好估计。的相关性，在一个较大的管道直径的气泡的适用性也进行了研究。
Mass transfer rateskLof single carbon-dioxide bubbles with chemical absorption in a vertical pipe were investigated using aqueous sodium hydroxide solutions. The pH of the solution was varied from 12 to 13.15. The pipe diameterDwas 12.5 mm. The bubble diameterdwas varied for 0.4 <d/D< 1.4 to cover various bubble shapes. The enhancement factor,E, which is the ratio ofkLwith and without chemical absorption, was almost unity for pH < 12.25. ThenEincreased with increasing pH anddfor pH > 12.25. Its magnitude was, however, lower than the estimation by the two-film theory. AnEcorrelation was developed. Good estimation of the Sherwood number for bubbles with chemical absorption was obtained by combining theEcorrelation and the Sherwood number correlations for bubbles without chemical absorption. Applicability of the correlations to bubbles in a larger pipe diameter was also examined.