Sulfonation heat transfer coefficient

Example 11.4.2 Estimation of the Heat Transfer Coefficient for a Thin-Film Sulfonator... 

In Example 10.3.1 we considered the calculation of the mass transfer coefficient in the gas phase of a thin-film sulfonator. A schematic diagram of a sulfonation reactor was provided by Figure 10.5. Now, in the modeling of the reactor, the estimation of the temperature profiles along the reactor tube is very important. An important parameter in the determination of the temperature profiles is the gas-phase heat transfer coefficient. Estimate this heat transfer coefficient at the entrance to the reactor for the same set of operating conditions as specified in Example 10.3.1. 

Since the heat capacity of SO3 is very high there is a substantial correction to the heat transfer coefficient caused by simultaneous mass transfer. Simultaneous mass and energy transfer needs to be properly taken into consideration in the design of industrial thin-film sulfonation reactors. ... 

Relative to agitated film, retention time of 1 1 and volume 1 1. Overall heat transfer coefficient for sulfonation, U = 0.8-2.2 kW/m °C for polymerization, U = 1-2.8 kW/m °C. decreasing with increasing viscosity. 

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