Halogen-modified metal–organic frameworks for efficient separation of alkane from natural gas

Abstract

As a rich green energy source, natural gas is widely used in many fields such as chemical industry, automobile energy, and daily life. However, it is very challenging to separate...

Porous MOF Featuring 2D Intersecting Channels Based on a Pentanuclear Mn5(COO)10CO3 Cluster with Upgrading of Pipeline Natural Gas

“…Notably, 1a shows the lowest uptake and initial Q st values for CH 4 , compared to those of alkane gases and CO 2 , which are in agreement with the lowest polarizability value of CH 4 (CO 2 : 29.11 × 10 25 cm −3 ; C 2 H 6 : 44.3−44.7 × 10 25 cm −3 ; C 3 H 8 : 62.9−63.7 × 10 25 cm −3 ; CH 4 : 25.93 × 10 25 cm −3 ). Moreover, the initial Q st value of C 3 H 8 exceeds some reported MOFs, such as MIL-142A (26.6 kJ mol −1 ), 47 DMOF-F (26 kJ mol −1 ), 48 and UPC-101-Al (22.92 kJ mol −1 ). 49 These results imply that 1a can apply in separation of CH 4 from C 3 H 8 /C 2 H 6 /CO 2 /CH 4 mixtures.…”

Robust Two-Dimensional Hydrogen-Bonded Organic Framework for Efficient Separation of C1–C3 Alkanes

“…These results indicate that HOF-NBDA can effectively differentiate CH 4 , C 2 H 6 , and C 3 H 8 , and has great potential in CH 4 purification and separation from ternary mixed gas. Meanwhile, the Q st value for C 3 H 8 is moderately high and much lower than UiO-67 (47.5 kJ·mol –1 ), Cu-IPA (43.9 kJ·mol –1 ), DMOF-Cl (36 kJ·mol –1 ), and Ni-MOF (39.6 kJ·mol –1 ) . Such a moderate Q st endows the preferential C 3 H 8 adsorption as well as facile recovery of C 3 H 8 under mild conditions with a low energy input during the desorption process.…”

“…The Q st value of C 3 H 8 at zero loading is 29.6 kJ•mol −1 , which is higher than that of C 2 H 6 (21.9 kJ•mol −1 ) and far more than that of CH 4 (13.3 kJ•mol −1 ). These results indicate that HOF-NBDA can 40 Cu-IPA (43.9 kJ•mol −1 ), 43 DMOF-Cl (36 kJ•mol −1 ), 44 and Ni-MOF (39.6 kJ•mol −1 ). 35 39 UiO-66 (32.0), 45 Zn-BPZ-SA (65.7), 46 and SDMOF-3 (49.4), 42 it is lower than that of NIIC-20-Et (1110), 47 Co-MOF (290), 13 MIL-142A (1300), 40 and BSF-1 (353).…”