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以电化学方法测定了SRNA4催化剂为固相的液固磁稳定床中的液固传质系数,采用浸没的微型传热探头测量了液固传热系数。实验结果表明:随磁场强度、液体黏度的增大,液固传质系数及传热系数减小;增加表观液速,传质系数、传热系数均增大。进而建立了由物性参数及操作参数估算液固传质Sherwood数及液固传热Nusselt数的关联式,实验值与预测值吻合良好,可为磁稳定床反应器的放大设计和操作优化提供一定的依据。
The liquid-solid mass transfer coefficient of the SRNA4 catalyst in the solid-liquid, liquid-solid-magnetically stable bed was measured electrochemically. The liquid-solid heat transfer coefficient was measured by immersing the micro heat transfer probe. The experimental results show that with the increase of magnetic field strength and liquid viscosity, the mass transfer coefficient and heat transfer coefficient of liquid-solid decrease. The increase of apparent liquid velocity, mass transfer coefficient and heat transfer coefficient all increase. Then the correlation between the Sherwood number and the Nusselt number of the liquid-solid mass transfer is established by the physical parameters and operating parameters. The experimental data are in good agreement with the predicted values and can be used to optimize the amplification design and operation optimization of the magnetically-stabilized bed reactor The basis.