Analysis of the mass transfer mechanism in a hollow fiber membrane ozone contact reactor

被引：0

作者：

Yao F. ^{[1
,2
]}

Bi Y. ^{[1
]}

Tang C. ^{[2
]}

Du M. ^{[1
]}

Li Z. ^{[1
]}

Zhang Y. ^{[2
]}

Sun X. ^{[1
]}

机构：

[1] Key Laboratory of Ecological Industry, Chinese Research Academy of Environmental Sciences State Environmental Protection, Beijing

[2] School of Architecture and Civil Engineering, North China University of Science and Technology, Hebei, Tangshan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2024年 / 43卷 / 02期

关键词：

contact reactor; hydrophobic PTFE hollow fiber membrane; mass transfer; ozone;

D O I：

10.16085/j.issn.1000-6613.2023-0307

中图分类号：

学科分类号：

摘要：

A membrane-contact ozone (O3) mass transfer technology was developed by assembling hydrophobic PTFE hollow fiber membrane into a membrane contactor. The differences between bubble mass transfer and membrane contact mass transfer were compared. The main influencing factors and mass transfer mechanism of the technology were studied by O3 mass transfer model and resistance model. The results showed that O3 can be effectively transferred through the hydrophobic PTFE membrane. When the stirring speed reached 1500r/min, the apparent mass transfer coefficient of membrane mass transfer (0.3049min-1) was comparable to that of bubble mass transfer (0.3109min-1). At the same time, the hydrophobic structure of the membrane surface reduced the humidity of the exhaust gas to below 0.8g/m3, which was much lower than the bubble mass transfer (>11.5g/m3), which met the standard of entering the ozone generator and had the feasibility of recovering oxygen. The mass transfer flux of O3 was affected by liquid flow rate, pH value, pollutant concentration, gas flow rate and inlet O3 concentration. When pH=11, phenol concentration was 0 or pH=7, phenol concentration was 20mg/L, the mass transfer flux reached 0.16g/(m2•h). The mass transfer resistance of the O3 mass transfer process was mainly composed of membrane resistance and liquid phase resistance, and the liquid phase resistance can be effectively reduced by controlling the liquid phase conditions. Therefore, further reducing the mass transfer resistance required the development of membrane technology. © 2024 Chemical Industry Press Co., Ltd.. All rights reserved.

引用

页码：1089 / 1097

页数：8

共 26 条

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