TY - JOUR
T1 - Direct Ethylene Purification from Cracking Gas via a Metal–Organic Framework Through Pore Geometry Fitting
AU - Chen, Yang
AU - Wu, Zhenduo
AU - Fan, Longlong
AU - Krishna, Rajamani
AU - Huang, Hongliang
AU - Wang, Yi
AU - Xiong, Qizhao
AU - Li, Jinping
AU - Li, Libo
N1 - Publisher Copyright:
© 2024 THE AUTHORS
PY - 2024/10
Y1 - 2024/10
N2 - The direct one-step separation of polymer-grade C2H4 from complex light hydrocarbon mixtures has high industrial significance but is very challenging. Herein, an ethylene-adsorption-weakening strategy is applied for precise regulation of the pore geometry of four tailor-made metal–organic frameworks (MOFs) with pillar-layered structures, dubbed TYUT-10/11/12/13. Based on its pore geometry design and functional group regulation, TYUT-12 exhibits exceptional selective adsorption selectivity toward C3H8, C3H6, C2H6, C2H2, and CO2 over C2H4; its C2H6/C2H4 adsorption selectivity reaches 4.56, surpassing the record value of 4.4 by Fe2(O2)(dobdc) (dobdc4− = 2,5-dioxido-1,4-benzenedicarboxylate). The weak π–π stacking binding affinity toward C2H4 in TYUT-12 is clearly demonstrated through a combination of neutron powder diffraction measurements and theoretical calculations. Breakthrough experiments demonstrate that C2H4 can be directly obtained from binary, ternary, quaternary, and six-component light hydrocarbon mixtures with over 99.95% purity.
AB - The direct one-step separation of polymer-grade C2H4 from complex light hydrocarbon mixtures has high industrial significance but is very challenging. Herein, an ethylene-adsorption-weakening strategy is applied for precise regulation of the pore geometry of four tailor-made metal–organic frameworks (MOFs) with pillar-layered structures, dubbed TYUT-10/11/12/13. Based on its pore geometry design and functional group regulation, TYUT-12 exhibits exceptional selective adsorption selectivity toward C3H8, C3H6, C2H6, C2H2, and CO2 over C2H4; its C2H6/C2H4 adsorption selectivity reaches 4.56, surpassing the record value of 4.4 by Fe2(O2)(dobdc) (dobdc4− = 2,5-dioxido-1,4-benzenedicarboxylate). The weak π–π stacking binding affinity toward C2H4 in TYUT-12 is clearly demonstrated through a combination of neutron powder diffraction measurements and theoretical calculations. Breakthrough experiments demonstrate that C2H4 can be directly obtained from binary, ternary, quaternary, and six-component light hydrocarbon mixtures with over 99.95% purity.
KW - Adsorptive separation
KW - CH purification
KW - Metal–organic frameworks
KW - One-step purification
KW - Pore regulation
UR - https://www.scopus.com/pages/publications/85192110591
U2 - 10.1016/j.eng.2024.01.024
DO - 10.1016/j.eng.2024.01.024
M3 - 文章
AN - SCOPUS:85192110591
SN - 2095-8099
VL - 41
SP - 84
EP - 92
JO - Engineering
JF - Engineering
ER -