Mixed matrix membrane contactor containing core-shell hierarchical Cu@4A filler for efficient SO2 capture
| Autor: | Shaofei Wang, Xu Li, Qingping Xin, Hong Wu, Yifan Li, Zhongyi Jiang, Yuzhong Zhang, Lei Zhang, Liguo Lou, Leitao Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Mass transfer coefficient
021110 strategic defence & security studies Environmental Engineering Materials science Facilitated diffusion Health Toxicology and Mutagenesis Composite number 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology 010501 environmental sciences Permeation 01 natural sciences Pollution Copper Adsorption Membrane Chemical engineering chemistry Environmental Chemistry Absorption (chemistry) Waste Management and Disposal 0105 earth and related environmental sciences |
| Zdroj: | Journal of Hazardous Materials. 376:160-169 |
| ISSN: | 0304-3894 |
| Popis: | Achieving high flux membrane contactor is significantly important for hazardous gas removal. In this study, we prepared poly(vinylidene fluoride) (PVDF)-based mixed matrix membrane contactor (MMMC) that contained a core-shell hirarchical Cu@4A composite filler (Cu@4A). On one hand, the Cu@4A regulated the physical structure of MMMC, which enhanced gas permeation and thus resulted in the increment of physical SO2 absorption flux. On the other hand, Cu@4A changed the chemical environment of MMMC by remarkably increased SO2 facilitated transport sites, which elevated SO2 concentration around Cu@4A by the enhancement of adsorption and oxidation of SO2, resulting in the increase of chemical SO2 absorption flux. Moreover, the copper nanosheets on 4A helped to construct facilitated transport pathways along the Cu@4A fillers at polymer-filler interface. The results showed that Cu@4A loaded MMMC exhibited increased SO2 removal efficiency and SO2 absorption flux compared with PVDF control membrane. Specifically, the M1040 MMMC loaded with 40 wt% Cu@4A and PVDF concentration 10 wt% exhibited the highest SO2 removal efficiency and SO2 absorption flux, which was up to 73.6% and 9.1 × 10−4 mol·m-2·s-1 at the liquid flow rate of 30 L/h. Besides, the overall SO2 mass transfer coefficient (Ko) and membrane mass transfer resistance (H/Km) were investigated. |
| Databáze: | OpenAIRE |
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