Guest-molecule-induced self-adaptive pore engineering facilitates purification of ethylene from ternary mixture

Zr- and Ti-based metal–organic frameworks: synthesis, structures and catalytic applications

“…As a class of emerging porous network materials, MOFs exhibit potential applications, including gas adsorption and separation, sensing, heterogeneous catalysis, magnetism and drug delivery. 1–7 However, the early MOFs suffer from moisture sensitivity, which limits their use in real applications. One of the most effective methods to overcome this problem is coating a hydrophobic reagent on the surface of MOFs, such as polydimethysiloxane (PDMS).…”

Pillar-layer Zn–triazolate–dicarboxylate frameworks with a customized pore structure for efficient ethylene purification from ethylene/ethane/acetylene ternary mixtures

“…2d). 3,[12][13][14][15][16][25][26][27][28][29][30][31][32] The isosteric heats of adsorption (Q st ) of C 2 H 2 , C 2 H 4 and C 2 H 6 on HIAM-210 were determined by using the Virial equation (Fig. S8 and S9 †).…”

“…The adjacent uncoordinated carboxylate–O atoms decorated on the pore surface act as strong binding sites for preferential adsorption toward C 2 H 6 and C 2 H 2 over C 2 H 4 , enabling HIAM-210 to have relatively high adsorption selectivities for C 2 H 2 /C 2 H 4 (2.0) and C 2 H 6 /C 2 H 4 (2.0), which exceed most of the MOFs previously tested for C 2 H 4 /C 2 H 6 /C 2 H 2 separation, such as TJT-100 (1.8 and 1.2), ZJNU-115 (2.05 and 1.56), NUM-9 (1.50 and 1.62), NPU-2 (1.25 and 1.52), UPC-66 (1.05 and 1.65), etc. 12–16 Breakthrough experiments indicated that polymer-grade (99.95+%) C 2 H 4 can be directly produced from ternary C 2 H 2 /C 2 H 4 /C 2 H 6 mixtures. Grand canonical Monte Carlo (GCMC) simulations and DFT calculations provide important insights into the preferential adsorption mechanism at the molecular level.…”

Rational Construction of Ultrahigh Thermal Stable MOF for Efficient Separation of MTO Products and Natural Gas

“…Metal–organic frameworks (MOFs) with the variety of topologies meet the task-specific application requirements. − The prominent advantages of MOFs over the zeolites and carbon adsorbents are their precisely controllable pores and easy modifications, which display unparalleled performance for gases and obtain remarkable progress in gas separation application, including Xe/Kr, C 2 H 6 /C 2 H 4 , C 2 H 2 /CO 2 , C 3 H 6 /C 3 H 8 , and so on. − However, the less commonly reported MOFs displayed the separation for C 3 /C 2 hydrocarbons, especially for C 3 H 6 /C 2 H 4 . , In addition, water vapor often coexists with the feed gases in separation process, which will greatly degrade the separation performance of adsorbents, thus the stability of MOFs is a prerequisite for utilization from an industrial point of view. Many efforts have been devoted improving the thermal and chemical stability of MOFs, including adopting high-oxidation-state metal ions or clusters .…”