Effect of volume decrease on fluidization quality of fluidized catalyst beds
Effect of volume decrease on fluidization quality of fluidized catalyst beds
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DOI：
10.1002/aic.10925
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发表时间：
2006-09
期刊：
影响因子：
3.7
通讯作者：
T. Kai;K. Toriyama;K. Nishie;Takeshige Takahashi;M. Nakajima
中科院分区：
文献类型：
--
作者：
T. Kai;K. Toriyama;K. Nishie;Takeshige Takahashi;M. Nakajima
当涉及气体体积减少的反应在流化催化剂床中进行时，流化质量显著降低。在本研究中，我们在透明柱中进行了二氧化碳加氢反应，以观察床层行为。当反应速率增加时，乳液相的流动性降低，并发生沟流。当乳液相的流动性甚至进一步降低时，床的上部被去流化，并且该部分被提升通过柱。这种现象导致从反应器中夹带大量催化剂颗粒。研究了气体体积减少速率和最大气体收缩比对流化行为的影响。当涉及气体体积减少的反应在流化催化剂床中进行时，可以通过气体体积减少速率成功地给出稳定操作的标准，该标准对于确定建立良好流化所需的操作条件是有用的。
The fluidization quality significantly decreased when the reaction involving a decrease in the gas volume was carried out in a fluidized catalyst bed. In the present study, we carried out the hydrogenation of carbon dioxide in a transparent column to observe the bed behavior. When the reaction rate was increased, the fluidity of the emulsion phase decreased and channeling occurred. When the fluidity of the emulsion phase decreased even further, the upper part of the bed was defluidized and this part was lifted up through the column. This phenomenon caused the entrainment of a large amount of catalyst particles from the reactor. We studied the effects of the reduction rate of the gas volume and the maximum gas contraction ratio on the fluidization behavior. The criterion for a stable operation, which could be successfully given by the gas-volume reduction rate, is useful for determining the operating conditions needed to establish good fluidization when the reactions involving a decrease in the gas volume are carried out in a fluidized catalyst bed.