Concentration and Temperature Profiles in a Tubular Reactor for Methanol Synthesis with the Outer-wall of a Uniform Temperature. II. Profiles in Reactors with a Heat Exchanger Tube in the Catalyst Bed

概要

論文の詳細を見る
Among the three types of heat exchanger tubes, a single tube countercurrent type, a double tube countercurrent type, and a double tube concurrent type, only the first one serves to increase the methanol production considerably compared with the effect of the previously tested reactor with no heat exchanger tube. On the basis of the experimental temperature profiles in both the catalyst bed and the single tube-heat exchanger tube, the cooling coefficient with the tube has been calculated to give the value as a function of the bed length. The value, when averaged over the whole bed length, agrees with the calculated value from the heat transfer coefficients, h or h′ and ha, available from certain formulae. By the use of this value, the average temperature profiles in the bed have been calculated on the basis of the experimental concentration profile; the resultant profile agrees well with the experimental one. As regards the double tube-heat exchanger tubes, the temperature profiles for both the annular-shaped space and the inner tube have been calculated from the experimental bed temperature profiles. The results show that the profiles in the second passage of the tubes always slope down markedly in the upper zone and that, as a consequence, the bed temperature profiles are apt to remain almost identical with that for the previously tested reactor with no heat exchanger tube.
社団法人日本化学会の論文