Electrospinning in membrane contactor: manufacturing Elec-PVDF/SiO2 superhydrophobic surface for efficient flue gas desulphurization applications

被引：21

作者：

Xin, Qingping ^{[1
]}

Xie, Kaiqiang ^{[1
]}

Liang, Qingqing ^{[1
]}

Li, Xu ^{[1
]}

Zeng, Yinan ^{[1
]}

Zhao, Yuhang ^{[1
]}

Zhang, Lei ^{[1
]}

Wang, Shaofei ^{[2
]}

Li, Hong ^{[1
]}

Zhang, Yuzhong ^{[1
]}

机构：

[1] TianGong Univ, Sch Mat Sci & Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China

[2] MIT, Dept Chem Engn, Cambridge, MA 02139 USA

来源：

GREEN CHEMICAL ENGINEERING | 2021年 / 2卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Electrospinning; Composite membrane contactor; Superhydrophobic surface; Flue gas desulfurization; HOLLOW-FIBER MEMBRANE; SIMULTANEOUS ABSORPTION; CO2; CAPTURE; SULFUR-DIOXIDE; SO2; PERFORMANCE; SEPARATION; WATER; REMOVAL; FABRICATION;

D O I：

10.1016/j.gce.2020.10.011

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In membrane contactors, maintaining a high SO2 absorption flux and an excellent wetting resistance are crucial for hazardous gas removal. In this study, we adopted an electrospinning strategy to fabricate highly robust super hydrophobic dual-layer Elec-PVDF/SiO2 composite membrane contactors used for flue gas desulfurization. The composite membrane contactor consisted of a durable and ultrathin three-dimensional (3D) superhydrophobic surface and a porous supporting layer, where the formulation was optimized by regulating the PVDF concentration, solvent ratio and SiO2 particles content in electrospinning solution. The scanning electronic microscopy (SEM), EDS-mapping, water contact angle (WCA) and surface roughness of as-prepared Elec-PVDF/SiO2 composite membrane contactors were conducted to explore the physical and chemical structure. The SiO2nanoparticles were uniformly loaded in ElecPVDF/SiO2 composite membrane contactor, and constructed micro-nano dual-coarse lotus-leaf-like morphology, which noticeably elevated surface roughness (Ra). The SiO2 nanoparticles also functioned as hydrophobic modifiers, which boosted the WAC up to 155 degrees. The SO2 absorption fluxes and SO2 removal efficiencies were investigated. In particular, the membrane contactor doped with 20 wt% SiO2 nanoparticles significantly elevated the stability of desulfurization performance. Besides, the membrane mass transfer coefficient (Km) and corresponding membrane mass transfer resistance (H/Km) were explored.

引用

页码：111 / 121

页数：11

共 65 条

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