A hydrostable cage-based MOF with open metal sites and Lewis basic sites immobilized in the pore surface for efficient separation and purification of natural gas and C₂H₂

Abstract

A cage-based MOF displays excellent hydrolytic stability as well as promising potential for diverse gas separation applications.

Cage‐Like Porous Materials with Simultaneous High C2H2Storage and Excellent C2H2/CO2Separation Performance

“…The C 2 H 2 and CO 2 gas adsorption isotherms of FJI‐H8‐R series were measured at 273 K, 298 K and 303 K respectively. As shown in Figure 3, the C 2 H 2 uptake of FJI‐H8‐R series is 229 cm 3 g −1 , 217 cm 3 g −1 , 179 cm 3 g −1 and 174 cm 3 g −1 at 1 bar and 298 K (FJI‐H8‐Me, FJI‐H8‐Et, FJI‐H8‐ n Pr and FJI‐H8‐ i Pr), respectively, which are greatly higher than those of the other famous MOFs, such as ZJU‐60a (150 cm 3 g −1 ), [10] ZnMOF‐74 (122 cm 3 g −1 ), [11] SNNU‐45 (134 cm 3 g −1 ), [12] PCP‐33 (122 cm 3 g −1 ), [13] UTSA‐74a (104 cm 3 g −1 ), [14] and ZJNU‐15(78.7 cm 3 g −1 ) [15] . The above results indicate that in the isostructural FJI‐H8‐R series the cag‐like cavities contributes much to the high C 2 H 2 uptakes.…”

MoP@C Supported on Absorbent Cotton as a Highly Efficient Catalyst towards Hydrodechlorination Reaction

“…Obviously, the total adsorption volume of MoP@C‐14.1 is increased compared with the unmodified MoP, indicating that the effect of absorbent cotton on MoP is strengthened. Moreover, the hysteresis loop of MoP@C‐14.1 in the isotherm shift to P/P 0 values of 0.7–1.0, and the adsorption amount on the high‐pressure side is larger than unmodified MoP , . It hints that the slit pores may be formed by the accumulation of flake particles .…”

An Isomeric Copper‐Diisophthalate Framework Platform for Storage and Purification of C2H2and Exploration of the Positional Effect of the Methyl Group

“…As shown in Figure 3e and Figure 3f, the hierarchy of adsorption selectivity did not change when the C 2 H 2 molar ratio in gas mixtures changed from 0.1 to 0.9. It is noteworthy that among the three MOF compounds, ZJNU‐96 showed the highest C 2 H 2 /CH 4 and C 2 H 2 /CO 2 adsorption selectivities at 298 K and 1 atm, which is comparable to that of its parent MOF NOTT‐101 (C 2 H 2 /CH 4 : 26.7), [16] but higher than those of some other reported MOFs such as BUT‐70B (C 2 H 2 /CH 4 : 23.3), [41] PCM‐48 (C 2 H 2 /CH 4 : 23.3), [42] UTSA‐222 (C 2 H 2 /CH 4 : 19), [43] FJU‐36 (C 2 H 2 /CH 4 : 17.7), [44] UPC‐33 (C 2 H 2 /CH 4 : 7.78), [45] ZJNU‐15 (C 2 H 2 /CO 2 : 4.4), [11b] Cu(BDC‐Br) (C 2 H 2 /CO 2 : 3.9), [46] NTU‐9 (C 2 H 2 /CO 2 : 3.5), [47] BSF‐1 (C 2 H 2 /CO 2 : 3.3), [48] ZJNU‐14 (C 2 H 2 /CO 2 : 3.42), [17b] UTSA‐68 (C 2 H 2 /CO 2 : 3.4), [49] Zn 3 (ALP)(TDC) 2.5 (C 2 H 2 /CO 2 : 2.8), [50] and Co(btzip)(H 2 btzip) (C 2 H 2 /CO 2 : 2.5) [51] at the same conditions. In particular, the C 2 H 2 /CH 4 and C 2 H 2 /CO 2 adsorption selectivity of the ortho ‐dimethyl‐functionalized MOF ZJNU‐96 is 8.6 % and 8.3 % higher than the meta ‐dimethyl‐decorated counterpart ZJNU‐95 .…”