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在不同温度 (15℃、20℃、25℃) 下,测试了活性炭 C40/4 吸附有机气体丙酮的吸附热引起吸附柱出口温度的变化。理论分析了吸附过程的能量守恒模型,在其他物质守恒,动量守恒和吸附平衡数学模型的基础上,采取有限差分方法,并借助计算软件 ATHENA VIUALWORKBENCH 对模型进行了数值解。探讨了物质轴向扩散系数,吸附热对吸附柱出口温度随时间变化规律的影响,发现吸附质轴向扩散系数是一个很小的数,可忽略不计,从而简化了模型。数值计算结果与实验结果能很好地相吻合。为获得吸附过程中有效传热系数提供了有效的解决方法,并为吸附过程的设计、预测和优化提供支持。
At different temperatures (15 ℃, 20 ℃, 25 ℃), the change of outlet temperature of adsorption column was measured by the adsorption heat of adsorption of organic gas acetone on activated carbon C40 / 4. The energy conservation model of adsorption process is theoretically analyzed. On the basis of other mathematical models of conservation of material, conservation of momentum and adsorption equilibrium, the finite difference method is adopted, and the numerical solution of the model is carried out by means of calculation software ATHENA VIUALWORKBENCH. The influence of material axial diffusion coefficient and heat of adsorption on the outlet temperature of adsorption column with time was discussed. The axial diffusion coefficient of adsorbate was found to be a negligible number, which simplified the model. Numerical results and experimental results can be well matched. It provides an effective solution to obtain effective heat transfer coefficient in adsorption process and supports the design, prediction and optimization of adsorption process.