Water-Stable Anionic Metal–Organic Framework for Highly Selective Separation of Methane from Natural Gas and Pyrolysis Gas

Abstract

A 3D water-stable anionic metal-organic framework [Zn4(hpdia)2]·[NH2(CH3)2]·3DMF·4H2O (FJI-C4) was constructed based on an elaborate phosphorus-containing ligand 5,5'-(hydroxyphosphoryl)diisophthalic acid (H5hpdia). FJI-C4 with narrow one-dimensional (1D) pore channels exhibits high selectivity of C3H8/CH4 and C2H2/CH4. It is the first time for the MOF which contains phosphorus for selective separation of methane from natural gas and pyrolysis gas.

An Amino‐Functionalized Metal‐Organic Framework, Based on a Rare Ba12(COO)18(NO3)2 Cluster, for Efficient C3/C2/C1 Separation and Preferential Catalytic Performance

“…The C 3 light hydrocarbons with higher adsorption enthalpy [Q st (C 3 H 6 ) > Q st (C 3 H 8 ) > Q st (C 2 H 2 ) > Q st (C 2 H 6 ) > Q st (C 2 H 4 ) > Q st (CH 4 )] may provide as tronger affinity for the skeleton, whichr esults in preferentiala dsorptiono ft hese gases on the skeleton of UPC-33.T hus, it may have ah igh selectivity for C 3 light hydrocarbonsr elative to CH 4 .T herefore the potential for separation of CH 4 from C 3 light hydrocarbons is appraisedb yi deal solution adsorbed theory (IAST) for binarye quimolar components (Figure 3d). At 1bar and 273 K, the selectivities of C 3 H 8 and C 3 H 6 with respectt oC H 4 are 151.50 and 228.34, which are higher than C 2 H 2 ,C 2 H 4 ,a nd C 2 H 6 to CH 4 of 11.36, 5.32, and 6.64, respectively.I ts hould be notedt hat thesev alues are lower than FJI-C4 (293.4 for C 3 H 8 /CH 4 ), [29] but greatly higher than UPC-21 (75 for C 3 H 6 /CH 4, 67 for C 3 H 8 /CH 4 ), [9] or FJI-C1 (78.7 for C 3 H 8 /CH 4 ). [31] The results indicatethat UPC-33 is aprospectivea bsorbent for effectively selective adsorptive separation of CH 4 from C 3 hydrocarbons at 273 K. The high adsorption selectivity of C 3 /CH 4 can be attributed to the narrow pore size distribution of UPC-33 to match the kinetic diameter of C 3 light hydrocarbon, resulting in its high C 3 /CH 4 sievinge ffects.…”

“…UPC-33 exhibits an adsorption amount of 93.6 and 94.3 cm 3 g À1 for C 3 H 8 and C 3 H 6 at 298 Ka nd 1bar,w hich are slightly lower than that of UPC-21 (103.0 and 110.1 cm 3 g À1 ), [9] and higher than FJI-C4 (74.7 cm 3 g À1 for C 3 H 8 ). [29] Considering its practical application, we also tested the reproducibility of UPC-33 for C 3 H 8 and C 3 H 6 storage. About 100 mg of the desensitized sample was loaded onto the ASAP2020-M analyzer,a nd four cycles of C 3 H 8 and C 3 H 6 adsorption at 298 Kw erer ecorded withoutt he reactivation process between each cycle.…”

Boosting Oxidative Desulfurization of Model and Real Gasoline over Phosphotungstic Acid Encapsulated in Metal–Organic Frameworks: The Window Size Matters

“…In recent years, metal–organic frameworks (MOFs) have been applied widely in numerous fields, which include molecular separation and heterogeneous catalysis, because of their high surface area/porosity, tunable pore apertures/window size, and many other outstanding properties . The use of highly porous MOFs as hosts to confine effective POMs (POM@MOF) is a promising strategy to prepare catalysts for ODS with a high activity and good recyclability.…”

Adsorption Equilibrium and Thermodynamic Analysis of CO2 and CH4 on Qinshui Basin Anthracite

“…The adsorption of binary gas mixtures can be directly predicted from pure component adsorption data using ideal adsorbed solution theory (IAST) proposed by Myers and Prausnitz [27]. Many studies have confirmed the effectiveness of IAST to predict the adsorption of mixture gases on a variety of porous materials [28][29][30].…”