A robust ethane-selective hypercrosslinked porous organic adsorbent with high ethane capacity

Abstract

While preferential adsorption of ethane (C2H6) over ethylene (C2H4) is more advantageous in industrial separation technology, most porous materials such as metal-organic frameworks, covalent-organic frameworks, and hydrogen-bonded organic frameworks provide...

Facile Preparation of Triphenylamine-Based Nanoporous Organic Polymers for Adsorption/Separation of C1–C3 Hydrocarbons and CO2 in Natural Gas

“…Furthermore, the C 3 H 8 adsorption capacities of the ANOPs decreased to some extent when the temperature was increased from 273 to 298 K. This suggests that the gases are adsorbed via physisorption. Nonetheless, the C 3 H 8 adsorption capacity of the ANOP-M polymer under ambient conditions (97.9 cm 3 /g) is substantially greater than those of previously reported porous materials, such as PAN-5H (81.3 cm 3 /g), MCOF-1 (55 cm 3 /g), PAN-T1 (79.0 cm 3 /g), and CuA 2 B 1 (67.2 cm 3 /g) . Moreover, we note that the C 2 H 6 uptake of the ANOP-M polymer under ambient conditions (64.6 cm 3 /g) is also substantially greater than those of previously reported porous materials, such as sPIs (27–37 cm 3 /g), PNOPs (55.2–63.1 cm 3 /g), and PAN-AN (53.3 cm 3 /g), and is competitive with those of ZnP-CTF-500 (90 cm 3 /g), CPOC-301 (87 cm 3 /g), and HCP_m-DCX (72.3 cm 3 /g) .…”

“…Nonetheless, the C 3 H 8 adsorption capacity of the ANOP-M polymer under ambient conditions (97.9 cm 3 /g) is substantially greater than those of previously reported porous materials, such as PAN-5H (81.3 cm 3 /g), MCOF-1 (55 cm 3 /g), PAN-T1 (79.0 cm 3 /g), and CuA 2 B 1 (67.2 cm 3 /g) . Moreover, we note that the C 2 H 6 uptake of the ANOP-M polymer under ambient conditions (64.6 cm 3 /g) is also substantially greater than those of previously reported porous materials, such as sPIs (27–37 cm 3 /g), PNOPs (55.2–63.1 cm 3 /g), and PAN-AN (53.3 cm 3 /g), and is competitive with those of ZnP-CTF-500 (90 cm 3 /g), CPOC-301 (87 cm 3 /g), and HCP_m-DCX (72.3 cm 3 /g) . Simultaneously, while the CO 2 uptake of the ANOPs (39.3–40.6 cm 3 /g) under ambient conditions may be inferior to those of TPA-TC-MA (42.0 cm 3 /g), CTF-N4 (49.3 cm 3 /g), and PAN-NH 2 (43.8 cm 3 /g), they are still greater than those obtained by other NOPs, such as COF-PIs (30.98–33.30 cm 3 /g), ICTFs (61.49–62.08 cm 3 /g), PANs (20–35 cm 3 /g), YPTPA (34.9 cm 3 /g), PSN-TAPA (33.6 cm 3 /g), and HCP-PNs (19.3–29.5 cm 3 /g) …”

“…6 Moreover, we note that the C 2 H 6 uptake of the ANOP-M polymer under ambient conditions (64.6 cm 3 /g) is also substantially greater than those of previously reported porous materials, such as sPIs (27−37 cm 3 /g), 30 PNOPs (55.2−63.1 cm 3 /g), 24 and PAN-AN (53.3 cm 3 /g), 34 and is competitive with those of ZnP-CTF-500 (90 cm 3 /g), 7 CPOC-301 (87 cm 3 /g), 35 and HCP_m-DCX (72.3 cm 3 /g). 36 Simultaneously, while the CO 2 uptake of the ANOPs (39.3− 40.6 cm 3 /g) under ambient conditions may be inferior to those of TPA-TC-MA (42.0 cm 3 /g), 37 CTF-N4 (49.3 cm 3 /g), 38 and PAN-NH 2 (43.8 cm 3 /g), 39 they are still greater than those obtained by other NOPs, such as COF-PIs (30.98−33.30 cm 3 / g), 40 ICTFs (61.49−62.08 cm 3 /g), 41 PANs (20−35 cm 3 /g), 42 YPTPA (34.9 cm 3 /g), 43 PSN-TAPA (33.6 cm 3 /g), 44 and HCP-PNs (19.3−29.5 cm 3 /g). 45 The results in Figure 4 and Table 1 can be expected to reflect the different physicochemical properties of the gases.…”

Highly Robust Microporous Metal‐Organic Frameworks for Efficient Ethylene Purification under Dry and Humid Conditions

“…By contrast, C 2 H 6 -selective adsorbents are considered to be more efficient for C 2 H 6 /C 2 H 4 separation because they can directly harvest high-purity C 2 H 4 in one step, hence reducing the corresponding energy expenditure. [13][14][15] Moreover, OMSs usually are absent in C 2 H 6 -selective adsorbents, thus benefiting the separation in humid conditions. Therefore, a promising adsorbent for C 2 H 6 /C 2 H 4 purification ought to preferentially adsorb C 2 H 6 molecules and meanwhile have weak water adsorption ability, [16,17] so as to minimize the influence of moisture on separation properties.…”

Carbonate-based hyper-cross-linked polymers with pendant versatile electron-withdrawing functional groups for CO2adsorption and separation

“…Typically, these proposed materials can be divided into traditional specimens such as zeolites, 4 clay, 5 silica, 6 diatomite, 7 activated carbon, 8 carbon nanotubes, 9 and alkali carbonate, 10 and emerging ones such as metal–organic frameworks 11,12 and microporous organic polymers, 13,14 mainly including covalent organic frameworks, 15,16 conjugated microporous polymers, 17,18 polymers of intrinsic microporosity, 19,20 and hyper-cross-linked polymers. 21,22 Among these, HCPs have a wide range of available building blocks, 23–25 alternative catalysts, 26,27 and diverse synthetic techniques, 28,29 and can usually be readily prepared via Friedel–Crafts chemistry with high yield and simple operation procedures. Owing to their low cost, high surface area, narrow pore size, tunable pore size distribution, good rigidity and excellent stability even under harsh conditions, HCPs have been demonstrated to have great potential in CO 2 uptake and separation, 30 thereby receiving growing attention from both the academic and industrial communities in recent years.…”