PDF
摘要
以聚醚嵌段聚酰胺(Pebax)为聚合物基体,以铬基金属有机框架MIL-100(Cr)为填充粒子,采用溶剂挥发法制备了系列Pebax/MIL-100(Cr)混合基质膜,并用于CH4/N2分离研究。结果表明,固相法合成的MIL-100(Cr)的BET为1808m2/g,在0.1MPa下对CH4的吸附量为0.5mmol/g,对N2的吸附量为0.28mmol/g,说明MIL-100(Cr)对CH4具有高亲和力。随着MIL-100(Cr)纳米粒子的加入,Pebax/MIL-100(Cr)混合基质膜的CH4/N2渗透选择性呈现先增大后减小的趋势,CH4渗透率基本保持不变;当MIL-100(Cr)添加量为15%(wt,质量分数)时,混合基质膜的CH4渗透性能保持在20Barrer,CH4/N2选择性能达到3.71。
Abstract
A series of Pebax/MIL-100(Cr) mixed matrix membranes were prepared by solvent evaporation method using polyether block polyamide (Pebax) as polymer matrix and chromium-based metal organic framework [MIL-100(Cr)] as filler particles,and used for CH4/N2 separation studies.The results showed that the BET of MIL-100(Cr) synthesized by solid-phase method was 1808m2/g,and the adsorption capacity of CH4 and N2 was 0.5mmol/g and 0.28mmol/g at 0.1MPa,respectively,indicating that MIL-100(Cr) had high affinity for CH4.With the addition of MIL-100(Cr) nanoparticles,the CH4/N2 permeation selectivity of Pebax/MIL-100(Cr) mixed matrix membrane presented a trend of first increasing and then decreasing,and the permeability of CH4 remained basically unchanged.When the addition of MIL-100(Cr) was 15wt%,the CH4 permeability of the mixed matrix membrane was maintained at 20 Barrer and the CH4/N2 selectivity was 3.71.
关键词
MIL-100(Cr)
/
混合基质膜
/
聚醚嵌段聚酰胺
/
CH4/N2
Key words
MIL-100(Cr)
/
mixed matrix membrane
/
polyether block polyamide
/
CH4/N2
Pebax/MIL-100(Cr)混合基质膜的制备及其在CH4/N2分离中的应用[J].
化工新型材料, 2023, 51(4): 220-224 DOI:10.19817/j.cnki.issn1006-3536.2023.04.039
[1] 李洪兵,张吉军.天然气需求影响因素分析及未来需求预测[J].运筹与管理,2021,30(9):132-138.
[2] 严绪朝,郝鸿毅.我国的煤层气及其开发利用现状和前景[J].石油科技论坛,2007,26(5):4-9.
[3] 刘慧文,胡晓滨,郝文明,等.玉米淀粉掺杂沥青基活性炭的甲烷/氮气吸附分离性能[J].功能材料,2021,52(10):10103-10109.
[4] Li L,Yang L,Wang J,et al.Highly efficientseparation of methane from nitrogen on a squarate-based metal-organicframework[J].AIChE,2018,64(10):3681-3689.
[5] Favre E.Carbon dioxide recovery from post-combustion processes:can gas permeation membranes compete with absorption？[J].Journal of Membrane Science,2007,294(1/2):50-59.
[6] 陈丙晨,徐积斌,万超,等.用于CO2/CH4分离的cPIM-1/ZIF-8混合基质膜的制备[J].化工进展,2020,39(9):3518-3524.
[7] Xiao Y,Chung T S.Grafting thermally labile molecules on crosslinkable polyimide to design membrane materials for natural gas purification and CO2 capture[J].Energy & Environmental Science,2011,4(1):201-208.
[8] Perez E V,Kenneth J B,Kenneth J.er al.Metal-organic polyhedra 18 mixed-matrix memranes for gas separation[J].Journal of Membrane Science,2014,463:82-93.
[9] Wang S M,Guo Q P,Liang S J,et al.Preparation of Ni-MOF-74/SBS mixed matrix membranes and its application of CH4/N2 separation[J].Separation and Purification Technology,2018,199:206-213.
[10] Zhang F Y,Inga H.Musselman,John P,et al.Gas permeability properties of Matrimid® membranes containing the metal-organic framework Cu-BPY-HFS[J].Journal of Membrane Science,2008,313(1-2):170-181.
[11] Mao Y,Qi H,Ye G,et al.Green and time-saving synthesis of MIL-100(Cr) and its catalytic performance[J].Microporous and Mesoporous Materials,2019,274:70-75.
基金资助
国家自然科学基金面上项目(22075107)
