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Bubble-to-liquid mass transfer rate coefficient of hydrogen in n-heptane was determined by three methods: (1) measurement of reaction rate, hydrogenation of α-methylstyrene, under the limitation of mass transfer, (2) moment analysis from break-through curve and (3) moment analysis from pulse response. The values obtained by the three methods agreed within allowable experimental error, indicating that the latter two methods, which are easy in experimental practice, can be used for the evaluation with good accuracy. Of the latter two, the estimation from breakthrough curve showed better agreement and smaller scattering of experimental points.

Estimation of bubble-to-liquid mass transfer rate coefficient by transient response technique and by steady state reaction studies.