改变流动反应器操作效率的允许路径的限制。
Restrictions on permissible paths for changing efficiencies of operation of flow reactors.
机构信息
Department of Chemistry, University of Oregon, Eugene, Oregon 97403.
出版信息
Proc Natl Acad Sci U S A. 1981 Dec;78(12):7248-9. doi: 10.1073/pnas.78.12.7248.
Sometimes a continuous flow stirred tank reactor can exhibit two or more different states of chemical reaction for the same flow rate. If such a situation is possible, a state of low reactive efficiency can be converted to one of higher efficiency by first decreasing the flow rate and then increasing it to the original value. This transition can never be accomplished by first increasing and then decreasing the flow rate. Similarly, a state of high reactive efficiency can be converted to one of lower efficiency only by first increasing and then decreasing the flow rate. These restrictions on permissible order of operations seem to differ from restrictions on efficiencies of cyclic heat engines and on directions of chemical change in closed systems as derived previously from thermodynamics.
有时，对于相同的流速，连续流搅拌釜式反应器可以表现出两种或更多种不同的化学反应状态。如果出现这种情况，可以先降低流速，然后再增加到原始值，从而将低效的反应状态转换为高效的反应状态。这种转变绝不能先增加然后再降低流速来实现。同样，只能先增加然后再降低流速，才能将高效的反应状态转换为低效的反应状态。这些对允许的操作顺序的限制似乎与先前从热力学中得出的对循环热机的效率和封闭系统中化学变化方向的限制不同。
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