| 机械化学法合成小尺寸MOF填料助力高性能CO2分离 |
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| 引用本文： | 耿晨旭,孙玉绣,黄宏亮,郭翔宇,乔志华,仲崇立. 机械化学法合成小尺寸MOF填料助力高性能CO2分离[J]. 化工学报, 2021, 72(9): 4750-4758. DOI: 10.11949/0438-1157.20210458 |
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| 作者姓名： | 耿晨旭 孙玉绣 黄宏亮 郭翔宇 乔志华 仲崇立 |
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| 作者单位： | 天津工业大学省部共建分离膜与膜过程国家重点实验室,化学工程与技术学院,天津300387 |
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| 基金项目： | 国家自然科学基金项目(21878229);天津市科技计划项目(19PTSYJC00020) |
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| 摘 要： | 利用金属-有机骨架UTSA-280具有特定刚性尺寸的一维孔道可以筛分CO2、CH4、N2的特性，采用机械化学研磨法减小其颗粒尺寸，将UTSA-280掺入聚砜（PSf）中制备MOF基混合基质膜，用于天然气提纯和烟道气CO2捕获。结果表明，在PSf中掺入UTSA-280不仅可以增加聚合物的CO2渗透通量而且提高了气体分离选择性。当UTSA-280掺杂量为30%（质量）时，混合基质膜对CO2/CH4、CO2/N2的分离因子分别为56.39和53.17，CO2的渗透通量为18.61 Barrer，相对于PSf纯膜，选择性分别提高了47.3%和63.5%，CO2渗透通量提高了128.9%，打破了“trade-off”效应。该工作通过引进具有分子筛分效应的MOF填料，能够增加气体通量的同时提高混合基质膜对含CO2气体的分离性能，对天然气的提纯以及烟道气的CO2的捕获有重要意义。
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| 关 键 词： | 金属-有机骨架 分子筛分 膜 天然气 CO2捕获 |
| 收稿时间： | 2021-04-06 |
Mechanochemically synthesized small sized MOF fillers assisted for highly efficient CO2 separation |
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| Chenxu GENG,Yuxiu SUN,Hongliang HUANG,Xiangyu GUO,Zhihua QIAO,Chongli ZHONG. Mechanochemically synthesized small sized MOF fillers assisted for highly efficient CO2 separation[J]. Journal of Chemical Industry and Engineering(China), 2021, 72(9): 4750-4758. DOI: 10.11949/0438-1157.20210458 |
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| Authors: | Chenxu GENG Yuxiu SUN Hongliang HUANG Xiangyu GUO Zhihua QIAO Chongli ZHONG |
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| Affiliation: | State Key Laboratory of Separation Membranes and Membrane Processes, School of Chemical Engineering and Technology, Tiangong University, Tianjin 300387, China |
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| Abstract: | UTSA-280 is a typical molecular sieving metal-organic framework (MOF) for separating CO2 from CH4 or N2, but the traditional solution-based synthesis method usually receives MOF particles with considerable size. Here an alternative mechanochemical way was used to fabricate small sized UTSA-280 particles, which was subsequently acted as filler materials in the polysulfone (PSf) based mixed matrix membranes (MMMs) for natural gas purification and CO2 capture in flue gases. It shows that the introduction of UTSA-280 filler in the PSf matrix not only accelerates the transmission of CO2 but also boosts the mixed gas separation factor of CO2/CH4 and CO2/N2. When the filler loading was 30%(mass) the CO2/CH4 and CO2/N2 separation factor were 56.39 and 53.17, respectively, and the CO2 permeability was 18.61 Barrer, compared with pure membrane, the CO2/CH4 and CO2/N2 separation factor and CO2 permeability showed 47.3%, 63.5% and 128.9% enhancement ratio, respectively, thus breaking the "trade-off" limitation. By introducing this specific MOF with molecular sieving character, the MOF based MMMs can improve the permeability of CO2 as well as gas separation performance, which is of great significance to the purification of natural gas and the capture of CO2 in flue gas. |
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| Keywords: | metal-organic frameworks molecular sieving membrane natural gas CO2 capture |
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