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Hatta number : ウィキペディア英語版 | Hatta number The Hatta number (Ha) was developed by Shirôji Hatta, who taught at Tohoku University.〔S. Hatta, Technological Reports of Tôhoku University, 10, 613-622 (1932).〕 It is a dimensionless parameter that compares the rate of reaction in a liquid film to the rate of diffusion through the film.〔R.B. Bird, W.E. Stewart, E.N. Lightfoot, Transport Phenomena, 2nd ed. John Wiley & Sons, 2002〕 For a second order reaction (''r''A = ''k''2''C''B''C''A), the maximum rate of reaction assumes that the liquid film is saturated with gas at the interfacial concentration (''C''A,i); thus, the maximum rate of reaction is ''k''2''C''B,bulk''C''A,i''δ''L.
It is an important parameter used in Chemical Reaction Engineering. ==References==
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