Publication Date:
2019
Description:
〈p〉Purification of ethylene (C〈sub〉2〈/sub〉H〈sub〉4〈/sub〉), the largest-volume product of the chemical industry, currently involves energy-intensive processes such as chemisorption (CO〈sub〉2〈/sub〉 removal), catalytic hydrogenation (C〈sub〉2〈/sub〉H〈sub〉2〈/sub〉 conversion), and cryogenic distillation (C〈sub〉2〈/sub〉H〈sub〉6〈/sub〉 separation). Although advanced physisorbent or membrane separation could lower the energy input, one-step removal of multiple impurities, especially trace impurities, has not been feasible. We introduce a synergistic sorbent separation method for the one-step production of polymer-grade C〈sub〉2〈/sub〉H〈sub〉4〈/sub〉 from ternary (C〈sub〉2〈/sub〉H〈sub〉2〈/sub〉/C〈sub〉2〈/sub〉H〈sub〉6〈/sub〉/C〈sub〉2〈/sub〉H〈sub〉4〈/sub〉) or quaternary (CO〈sub〉2〈/sub〉/C〈sub〉2〈/sub〉H〈sub〉2〈/sub〉/C〈sub〉2〈/sub〉H〈sub〉6〈/sub〉/C〈sub〉2〈/sub〉H〈sub〉4〈/sub〉) gas mixtures with a series of physisorbents in a packed-bed geometry. We synthesized ultraselective microporous metal-organic materials that were readily regenerated, including one that was selective for C〈sub〉2〈/sub〉H〈sub〉6〈/sub〉 over CO〈sub〉2〈/sub〉, C〈sub〉2〈/sub〉H〈sub〉2〈/sub〉, and C〈sub〉2〈/sub〉H〈sub〉4〈/sub〉.〈/p〉
Print ISSN:
0036-8075
Electronic ISSN:
1095-9203
Topics:
Biology
,
Chemistry and Pharmacology
,
Computer Science
,
Medicine
,
Natural Sciences in General
,
Physics
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