Gas-liquid Flow in a Multi-Channel Microreactor with Multi-Scale Constructal Distributors.
文献类型：会议论文
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| 作者 | Le J(乐军) ; Chen GW(陈光文) ; Yuan Q(袁权) ; Luo LA(罗灵爱) ; GonthierY. |
| 出版日期 | 2009-08-23 |
| 会议名称 | 8TH WORLD CONGRESS OF CHEMICAL ENGINEERING |
| 会议日期 | 2009-8-23 |
| 会议地点 | 加拿大 |
| 页码 | 2135/1 |
| 其他题名 | 具有多尺度构造分布器的多通道微反应器中的气-液流动 |
| 通讯作者 | 陈光文 |
| 中文摘要 | Abstract: Gas-liquid microreaction technology presents a typical means of process intensification in multiphase reactors, which has shown great potential in many gas-liquid reactions of industrial importance. The product capacity of gas-liquid microreactor is realized by performing gas-liquid contacting in a multitude of microchannels. During this numbering- up process, one important issue is to design proper fluid distributors in order to ensure two- phase flow equi-partition among parallel microchannels. In this article, the idea of integrating two multi-scale constructal distributors into a 16-channel gas-liquid microreactor to solve the problem of two-phase flow maldistribution is presented. CO2-water two-phase flow pattern in parallel microchannels of the present microreactor has been visualized. A large two-phase flow maldistribution was observed at comparatively low superficial gas velocities where the uniform flow pattern was slug flow, which was characterized by the presence of liquid alone flow in many microchannels. Nevertheless, an improvement in two-phase flow uniformity was found at increased superficial gas velocities and most microchannels were occupied by slug-annular flow at much high superficial gas velocities. A further fluid dynamic analysis has demonstrated that the lack of large pressure barrier in two constructal distributors was the main cause responsible for the observed two-phase flow maldistribution at small superficial gas velocities. Under these circumstances, pressure fluctuations accompanied slug flow would greatly disturb an otherwise nearly uniform flow distribution inside each constructal distributor. However, at comparatively high superficial gas velocities, the uniform flow pattern turned to be slug-annular flow and the flow in each distributor was hardly affected by two-phase flow in the subsequent microchannels. Thus the tree architectures of both distributors could guarantee a nearly uniform two-phase flow distribution, as our CFD simulation correctly reflected. Finally, further improvement of the present microreactor design was discussed. |
| 会议主办者 | École Polytechnique de Montréal |
| 学科主题 | 物理化学 |
| 语种 | 中文 |
| 源URL | [http://159.226.238.44/handle/321008/113802]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 推荐引用方式 GB/T 7714 | Le J,Chen GW,Yuan Q,et al. Gas-liquid Flow in a Multi-Channel Microreactor with Multi-Scale Constructal Distributors., 具有多尺度构造分布器的多通道微反应器中的气-液流动[C]. 见:8TH WORLD CONGRESS OF CHEMICAL ENGINEERING. 加拿大. 2009-8-23. |
入库方式： OAI收割
来源：大连化学物理研究所
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