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Stable Aluminum Metal–Organic Frameworks (Al-MOFs) for Balanced CO2 and Water Selectivity
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-01-16 00:00:00 , DOI: 10.1021/acsami.7b17026
Haiwei Li 1 , Xiao Feng 1 , Dou Ma 1 , Mengxi Zhang 1 , Yuanyuan Zhang 1 , Yi Liu 1 , Jinwei Zhang 1 , Bo Wang 1
Affiliation  

Three new Al-MOFs in the formation of [Al4(OH)2(OCH3)4(OH-BDC)3]·xH2O (BIT-72), [Al4(OH)2(OCH3)4(CH3–BDC)3]·xH2O (BIT-73) and {Al4(OH)2(OCH3)4[(CH3)2-BDC]3}·xH2O (BIT-74) have been synthesized by assembling Al3+ ion with terephthalic acid ions decorated with monohydroxyl, monomethyl or dimethyl groups, respectively. All of these three MOFs exhibit high stability in boiling water and acidic conditions. Among them, BIT-72 shows the highest surface area of 1618 m2·g–1 and IAST CO2/N2 selectivity of 48, while BIT-73 and BIT-74 present moderate IAST CO2/N2 selectivity and much lower H2O capacity below P/P0 = 0.3. The high CO2/N2 selectivity together with alleviative H2O sorption at low water relative pressure may provide promising potential in postcombustion CO2 capture.

中文翻译:

稳定的铝金属有机框架(Al-MOF),可实现平衡的CO 2和水选择性

形成[Al 4(OH)2(OCH 34(OH-BDC)3 ]·xH 2 O(BIT-72),[Al 4(OH)2(OCH 34(CH 3 -BDC)3 ]·xH 2 O(BIT-73)和{Al 4(OH)2(OCH 34 [(CH 32 -BDC] 3 }·xH 2 O(BIT-74)通过组装Al 3+合成离子与分别由一羟基,一甲基或二甲基基团修饰的对苯二甲酸离子。所有这三个MOF在沸水和酸性条件下均显示出高稳定性。其中,BIT-72的最大表面积为1618 m 2 ·g –1,IAST CO 2 / N 2的选择性为48,而BIT-73和BIT-74的IAST CO 2 / N 2的选择性为中等,低得多。 H 2 O容量低于P / P 0 = 0.3。高的CO 2 / N 2选择性和缓和的H 2低水相对压力下的O吸附可为燃烧后的CO 2捕集提供有希望的潜力。
更新日期:2018-01-16
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