Study on water and gas permeation characteristics with ZIF-8 mixed matrix membranes

IF 2.1 4区 环境科学与生态学 Q2 ENGINEERING, CIVIL
A. Gawali, S. Gawali, Surendra Sasi Kumar Jampa, M. Sinha, Jalaja B. Pandya, S. Shinde, Snigdha Khuntia
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引用次数: 0

Abstract

The membrane separation process lacks intrinsic permeation characteristics to compete with other separation technologies like adsorption, sedimentation, coagulation, skimming, and distillation. A mixed matrix membrane (MMM) is one of the strategies to improve the separation characteristics with embedded nanofillers particles. Zeolite imidazolate framework (ZIF) has a new subclass of inorganic–organic hybrid materials that are being introduced as new fillers for incorporation into the polymer matrix for various applications such as oily wastewater separation, wastewater treatment, natural gas dehydration, landfill gas upgrading, and mixed gas separation. In this experimental work, a metal-organic framework called ZIF-8 was synthesized and used as filler for modification of MMMs and characterized with FTIR and SEM. ZIF-8 nanoparticles up to 5 wt% loading were added to PSF casting solution then the permeation characteristics of MMMs showed an improved result like the pure water flux of the modified membrane at 2.5 bar was increased up to 456.38 L/m2h. In the case of pure gas separation, at 5 wt% ZIF-8 loading in PSF, the pure gas CO2 permeability at 9 bar pressure had increased to 10.54 barrer.
ZIF-8混合基质膜的水和气渗透特性研究
膜分离过程缺乏固有的渗透特性,无法与吸附、沉淀、混凝、脱脂和蒸馏等其他分离技术竞争。混合基质膜(MMM)是通过嵌入纳米填料颗粒来改善分离特性的策略之一。咪唑酸沸石骨架(ZIF)是一种新型无机-有机杂化材料,可作为新型填料掺入聚合物基体中,用于含油废水分离、废水处理、天然气脱水、垃圾填埋气改造和混合气体分离等各种应用。在本实验中,合成了一种名为ZIF-8的金属有机骨架,并将其用作填充剂改性mm,并用FTIR和SEM对其进行了表征。将负载为5 wt%的ZIF-8纳米粒子加入到PSF铸液中,MMMs的渗透特性得到改善,改性膜在2.5 bar下的纯水通量提高到456.38 L/m2h。在纯气体分离的情况下,在PSF中添加5 wt%的ZIF-8时,9 bar压力下的纯气体CO2渗透率增加到10.54 bar。
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来源期刊
CiteScore
4.10
自引率
21.10%
发文量
0
审稿时长
20 weeks
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