Characterization of a photocatalytic reaction in a continuous-flow recirculation reactor system
Characterization of a photocatalytic reaction in a continuous-flow recirculation reactor system
复制标题
DOI：
10.1002/jctb.1526
复制
发表时间：
2006-06
影响因子：
3.4
通讯作者：
F. Shiraishi;M. Nagano;Shinpon Wang
中科院分区：
文献类型：
--
作者：
F. Shiraishi;M. Nagano;Shinpon Wang
通常称为再循环模式的连续流再循环模式已知实际上是无意义的，除非反应物在反应器出口处与产物分离或反应是自催化的，因为当简单地循环少量含有反应物的流体时，由于流体在反应器入口处的混合，导致反应器出口处的转化率降低。然而，这种模式可能是有意义的，在光催化反应具有非常大的膜扩散阻力。因此，为了表明这种估计的有效性，我们从理论和实验两方面研究了连续流再循环反应器的特性。结果发现，通过增加循环流速，该反应器中的转化率和生产率高于连续流反应器中的转化率和生产率，因为膜扩散阻力显著降低。版权所有© 2006化学工业协会
A continuous-flow recirculation mode, generally called a recycle mode, is known to be practically meaningless except when the reactant is separated from the product at the reactor exit or when the reaction is autocatalytic, because when simply circulating a small amount of the fluid containing a reactant, the reactant concentration in this mode is lowered due to mixing of the fluid at the reactor entrance, leading to a decrease in the conversion at the reactor exit. This mode may, however, be meaningful in photocatalytic reactions with very large film-diffusional resistance. To indicate the validity of this estimation, therefore, characteristics of a continuous-flow recirculation reactor have been investigated both theoretically and experimentally. As a result, it is found that by increasing the circulation flow rate the conversion and productivity in this reactor is higher than that in a continuous-flow reactor because the film-diffusional resistance is remarkably reduced. Copyright © 2006 Society of Chemical Industry