Control of zeolite pore interior for chemoselective alkyne/olefin separations

doi:10.1126/science.aay8447

GSTDTAP > 气候变化

DOI	10.1126/science.aay8447
	Control of zeolite pore interior for chemoselective alkyne/olefin separations
	Yuchao Chai; Xue Han; Weiyao Li; Shanshan Liu; Sikai Yao; Chong Wang; Wei Shi; Ivan da-Silva; Pascal Manuel; Yongqiang Cheng; Luke D. Daemen; Anibal J. Ramirez-Cuesta; Chiu C. Tang; Ling Jiang; Sihai Yang; Naijia Guan; Landong Li
	2020-05-29
发表期刊	Science
出版年	2020
英文摘要	Alkenes such as ethylene and propene must be separated from alkynes before they can be converted in polymers. Drawbacks in current methods, such as hydrogenation of alkynes producing unwanted alkanes, has spurred interest in sorption separation methods. Zeolites have generally been inefficient, given the similar sizes and volatilities of the molecules. Chai et al. incorporated atomically dispersed divalent transition metal cations into faujasite zeolite and found that the nickel-containing analog efficiently removed alkynes from olefins through chemoselective binding at open nickel(II) sites. At ambient conditions in the presence of water and carbon dioxide, the zeolites retained separation selectivities of 100 and 92, respectively, for acetylene over ethylene and propyne over propylene for 10 adsorption-desorption cycles. Science , this issue p. [1002][1] The efficient removal of alkyne impurities for the production of polymer-grade lower olefins remains an important and challenging goal for many industries. We report a strategy to control the pore interior of faujasite (FAU) zeolites by the confinement of isolated open nickel(II) sites in their six-membered rings. Under ambient conditions, Ni@FAU showed remarkable adsorption of alkynes and efficient separations of acetylene/ethylene, propyne/propylene, and butyne/1,3-butadiene mixtures, with unprecedented dynamic separation selectivities of 100, 92, and 83, respectively. In situ neutron diffraction and inelastic neutron scattering revealed that confined nickel(II) sites enabled chemoselective and reversible binding to acetylene through the formation of metastable [Ni(II)(C2H2)3] complexes. Control of the chemistry of pore interiors of easily scalable zeolites has unlocked their potential in challenging industrial separations. [1]: /lookup/doi/10.1126/science.aay8447
领域	气候变化 ; 资源环境
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引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/271760
专题	气候变化资源环境科学
推荐引用方式 GB/T 7714	Yuchao Chai,Xue Han,Weiyao Li,et al. Control of zeolite pore interior for chemoselective alkyne/olefin separations[J]. Science,2020.
APA	Yuchao Chai.,Xue Han.,Weiyao Li.,Shanshan Liu.,Sikai Yao.,...&Landong Li.(2020).Control of zeolite pore interior for chemoselective alkyne/olefin separations.Science.
MLA	Yuchao Chai,et al."Control of zeolite pore interior for chemoselective alkyne/olefin separations".Science (2020).