Heng Zeng, Xiao-Jing Xie, Ting Wang, Mo Xie, Ying Wang, Rong-Jia Wei, Weigang Lu, Dan Li
{"title":"从 C2-C4 烷炔裂解乙烯的一维通道上的动态分子袋","authors":"Heng Zeng, Xiao-Jing Xie, Ting Wang, Mo Xie, Ying Wang, Rong-Jia Wei, Weigang Lu, Dan Li","doi":"10.1038/s44286-023-00004-2","DOIUrl":null,"url":null,"abstract":"Molecular sieving adsorbents can offer maximum adsorption selectivity with respect to molecular sizes, yet it is still challenging to discriminate middle-sized molecules from a mixture of three or more components. Here we report a metal–organic framework (JNU-3a) with dynamic molecular pockets along one-dimensional channels, enabling the one-step removal of ethylene (C2H4) from mixtures with C2–C4 alkynes in a single adsorption step regardless of their molecular sizes. Laboratory-scale column breakthrough experiments on 1.4 g of JNU-3a reveal that the three alkynes break through the column at almost the same but a later time, resulting in the high-purity separation of C2H4 (≥99.9995%) from a mixture with C2–C4 alkynes in a single adsorption operation. We further demonstrate pilot-scale column breakthrough on 107 g of JNU-3a and the collection of C2H4 in a gas cylinder. In particular, 30 continuous runs for a C2H2/C3H4/1-C4H6/C2H4 mixture (1:1:1:97) afford an average of 76.1 g per cycle of high-purity C2H4. Overall, JNU-3a may have great potential for industrial C2H4 purification via the concurrent removal of C2–C4 alkynes. It is challenging to separate middle-sized molecules from complex mixtures using traditional molecular sieves. Here a metal–organic framework has been developed with dynamic molecular pockets that can adjust and accommodate alkynes preferentially, realizing efficient production of high-purity ethylene from its mixtures with alkynes regardless of their molecular sizes.","PeriodicalId":501699,"journal":{"name":"Nature Chemical Engineering","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.nature.com/articles/s44286-023-00004-2.pdf","citationCount":"0","resultStr":"{\"title\":\"Dynamic molecular pockets on one-dimensional channels for splitting ethylene from C2–C4 alkynes\",\"authors\":\"Heng Zeng, Xiao-Jing Xie, Ting Wang, Mo Xie, Ying Wang, Rong-Jia Wei, Weigang Lu, Dan Li\",\"doi\":\"10.1038/s44286-023-00004-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Molecular sieving adsorbents can offer maximum adsorption selectivity with respect to molecular sizes, yet it is still challenging to discriminate middle-sized molecules from a mixture of three or more components. Here we report a metal–organic framework (JNU-3a) with dynamic molecular pockets along one-dimensional channels, enabling the one-step removal of ethylene (C2H4) from mixtures with C2–C4 alkynes in a single adsorption step regardless of their molecular sizes. Laboratory-scale column breakthrough experiments on 1.4 g of JNU-3a reveal that the three alkynes break through the column at almost the same but a later time, resulting in the high-purity separation of C2H4 (≥99.9995%) from a mixture with C2–C4 alkynes in a single adsorption operation. We further demonstrate pilot-scale column breakthrough on 107 g of JNU-3a and the collection of C2H4 in a gas cylinder. In particular, 30 continuous runs for a C2H2/C3H4/1-C4H6/C2H4 mixture (1:1:1:97) afford an average of 76.1 g per cycle of high-purity C2H4. Overall, JNU-3a may have great potential for industrial C2H4 purification via the concurrent removal of C2–C4 alkynes. It is challenging to separate middle-sized molecules from complex mixtures using traditional molecular sieves. Here a metal–organic framework has been developed with dynamic molecular pockets that can adjust and accommodate alkynes preferentially, realizing efficient production of high-purity ethylene from its mixtures with alkynes regardless of their molecular sizes.\",\"PeriodicalId\":501699,\"journal\":{\"name\":\"Nature Chemical Engineering\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-01-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.nature.com/articles/s44286-023-00004-2.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nature Chemical Engineering\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.nature.com/articles/s44286-023-00004-2\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nature Chemical Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.nature.com/articles/s44286-023-00004-2","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Dynamic molecular pockets on one-dimensional channels for splitting ethylene from C2–C4 alkynes
Molecular sieving adsorbents can offer maximum adsorption selectivity with respect to molecular sizes, yet it is still challenging to discriminate middle-sized molecules from a mixture of three or more components. Here we report a metal–organic framework (JNU-3a) with dynamic molecular pockets along one-dimensional channels, enabling the one-step removal of ethylene (C2H4) from mixtures with C2–C4 alkynes in a single adsorption step regardless of their molecular sizes. Laboratory-scale column breakthrough experiments on 1.4 g of JNU-3a reveal that the three alkynes break through the column at almost the same but a later time, resulting in the high-purity separation of C2H4 (≥99.9995%) from a mixture with C2–C4 alkynes in a single adsorption operation. We further demonstrate pilot-scale column breakthrough on 107 g of JNU-3a and the collection of C2H4 in a gas cylinder. In particular, 30 continuous runs for a C2H2/C3H4/1-C4H6/C2H4 mixture (1:1:1:97) afford an average of 76.1 g per cycle of high-purity C2H4. Overall, JNU-3a may have great potential for industrial C2H4 purification via the concurrent removal of C2–C4 alkynes. It is challenging to separate middle-sized molecules from complex mixtures using traditional molecular sieves. Here a metal–organic framework has been developed with dynamic molecular pockets that can adjust and accommodate alkynes preferentially, realizing efficient production of high-purity ethylene from its mixtures with alkynes regardless of their molecular sizes.