Separation of ethane and ethylene by a robust ethane-selective calcium-based metal–organic framework

Abstract

<p>Adsorption and separation of ethane and ethylene has been studied on a robust Ca-based microporous metal–organic framework which shows ethane-selective adsorption over ethylene.</p>

Pore-Space Partition and Optimization for Propane-Selective High-Performance Propane/Propylene Separation

“…Inspired by benchmark paraffin-selective adsorbents for olefin purification, especially the remarkable adsorption uptake and separation potential of C 2 H 2 /C 2 H 4 /C 2 H 6 hydrocarbons by bdc-type pacs materials (bdc = 1,4-benzenedicarboxylate), we postulated in this work that exceptional adsorption uptake and separation for larger C 3 H 6 /C 3 H 8 hydrocarbons could occur in the pacs materials by further optimizing the pore structure. − However, unlike well-known MOFs such as IRMOF-n and UiO-n series in which the pore dimension is dictated by one type of ligands, the pore dimension and function in multimodular pacs -type materials depend on the interplay between two types of ligands (Figure ) and can also be impacted by the charge of the framework (neutral, cationic, or anionic) and associated guest species. To develop novel pacs materials for C 3 H 6 /C 3 H 8 applications, in this work, we first constructed and characterized a novel charge-neutral heterometallic pacs material based on 2,6-ndc ([Co 2 V­(OH)­(2,6-ndc) 3 (tpt)], denoted CPM-734t).…”

Improving Ethane/Ethylene Separation Performance of Isoreticular Metal–Organic Frameworks via Substituent Engineering

“…Under the conditions of 298 K and 109 kPa, the adsorption selectivity of C 2 H 6 over C 2 H 4 , respectively, reaches 1.7, 1.4, 1.3, and 1.2 for ZJNU-21 , NJU-Bai7 , ZJNU-22 , and ZJNU-23 . The selectivity value of ZJNU-21 is similar to and even surpasses that of many coordination framework compounds reported for C 2 H 6 /C 2 H 4 separation (Figure g), such as MUF-15 (1.95), DUT-52­(Hf) (1.9), PCN-250 (1.9), NUM-7 (1.764), Dia-4-Ni (1.76), Ca­(H 2 tcpb) (1.67), CPM-233 (1.64), NUM-9 (1.61), JNU-2 (1.6), SNNU-40 (1.58), LIFM-63 (1.56), JXNU-9 (1.53), MIL-53-NDCA (1.53), Sc-BPDC (1.5), MIL-142A (1.5), Azole-Th-1 (1.44), UPC-612 (1.41), In- soc -MOF-1 (1.4), NPU-1 (1.32), MOF-545 (1.31), and CPOC-301 (1.3), but is inferior to that of a few high-performance C 2 H 6 -selective coordination framework compounds like Fe 2 O 2 (dobdc) (4.4), Cu­(Qc) 2 (3.4), Co­(AIN) 2 (2.96), ZJU-120 (2.74), MAF-49 (2.7), and NKMOF-8-Br (2.65) . As shown in Figures S26–S29, the adsorption selectivity of C 2 H 6 over C 2 H 4 increases with the decreasing measurement temperatures.…”

“…At the temperature of 298 K, the K H values of C 2 H 6 and C 2 H 4 are 0.344 and 0.239 mmol g −1 kPa −1 for NJU-Bai7 (Figure S18), 0.503 and 0.338 mmol g −1 kPa −1 for ZJNU-21 (Figure S19), 0.322 and 0.254 mmol g −1 kPa −1 for ZJNU-22 (Figure S20), and 0.467 and 0.403 mmol g −1 kPa −1 for ZJNU-23 (Figure S21), respectively. 4g), such as MUF-15 (1.95), 38 DUT-52(Hf) (1.9), 33 PCN-250 (1.9), 39 NUM-7 (1.764), 40 Dia-4-Ni (1.76), 34 Ca(H 2 tcpb) (1.67), 41 CPM-233 (1.64), 42 NUM-9 (1.61), 43 JNU-2 (1.6), 44 SNNU-40 (1.58), 45 LIFM-63 (1.56), 46 JXNU-9 (1.53), 47 MIL-53-NDCA (1.53), 48 Sc-BPDC (1.5), 49 MIL-142A (1.5), 50 Azole-Th-1 (1.44), 51 UPC-612 (1.41), 52 In-soc-MOF-1 (1.4), 53 NPU-1 (1.32), 54 MOF-545 (1.31), 55 and CPOC-301 (1.3), 56 but is inferior to that of a few high-performance C 2 H 6 -selective coordination framework compounds like Fe 2 O 2 (dobdc) (4.4), 36 Cu(Qc) 2 (3.4), 57 Co(AIN) 2 (2.96), 30 ZJU-120 (2.74), 58 MAF-49 (2.7), 29 and NKMOF-8-Br (2.65). 59 As shown in Figures S26−S29, the adsorption selectivity of C 2 H 6 over C 2 H 4 increases with the decreasing measurement temperatures.…”