...内，采用不同质量催化剂时得到的转化率(conversion)随空时变化曲线基本上是重合的，说 明反应基本不受外扩散(external diffusion)影响。 乙苯脱氢制苯乙烯时，如何选择适当的氧化铁系催化剂颗粒大小并控制乙苯液空速？
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external diffusion control 外扩散控制
internal and external diffusion 内外扩散
external and internal diffusion 外扩散和内扩散
The adsorption process in the experimental conditions can be considered as external diffusion control.
认为实验条件下的吸附过程属于外扩散控制。
The obtained results showed that the effect of external diffusion could be slackened by the decrease of fixed-bed voidage and the increase of space velocity.
计算结果表明，银催化剂床层空隙率的减小或操作空速的增加有利于减弱该催化反应过程中外扩散效应的影响。
The results show: external diffusion is control process for mass transfer, and increasing air velocity and decreasing particle diameter are effective measures to decrease mass transfer resistance.
研究结果表明：外扩散过程是传质的控制步骤，增大风速、减小吸附剂颗粒直径是减少传质阻力的有效措施。
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