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Fine-Tuning the Pore Environment of the Microporous Cu-MOF for High Propylene Storage and Efficient Separation of Light Hydrocarbons
Open accessAbstract
High Resolution Image Download MS PowerPoint Slide Ethylene (C 2 H 4 ) and propylene (C 3 H 6 ) are important energy sources and raw materials in the chemical industry. Storage and separation of C 2 H 4 and C 3 H 6 are vital to their practical application. Metal–organic frameworks (MOFs) having adjustable structures and pore environments are promising candidates for C 3 H 6 /C 2 H 4 separation. Herein, we obtained a Cu-based MOF synthesized by H 3 TTCA and pyrazine ligands. By adding different functional groups on the ligands within the MOFs, their pore environments are adjusted, and thus, the C 3 H 6 storage capacity and C 3 H 6 /C 2 H 4 separation efficiency are improved. Eventually, the fluoro- and methyl-functionalized iso-MOF-4 exhibits a better gas storage and C 3 H 6 /C 2 H 4 separation performance compared with iso-MOF-1 (nonfunctionalized), iso-MOF-2 (fluoro-functionalized), and iso-MOF-3 (methyl-functionalized). A record-high C 3 H 6 uptake of 293.6 ± 2.3 cm 3 g –1 (273 K, 1 atm) is achieved using iso-MOF-4 . Moreover, iso-MOF-4 shows excellent repeatability, and only 3.5% of C 3 H 6 storage capacities decrease after nine cycles. Employing Grand Canonical Monte Carlo (GCMC) simulations, it is indicated that iso-MOF-4 preferentially adsorbs C 3 H 6 rather than C 2 H 4 at low pressure. Single-crystal X-ray diffraction on C 3 H 6 -adsorbed iso-MOF-4 crystals precisely demonstrates the adsorption positions and arrangement of C 3 H 6 molecules in the framework, which is consistent with the theoretical simulations. Remarkably, gas sorption isotherms, molecular simulations, and breakthrough experiments comprehensively demonstrate that this unique MOF material exhibits highly efficient C 3 H 6 /C 2 H 4 separation. Additionally, iso-MOF-4 also possesses efficient separation of C 3 H 8 /CH 4 and C 2 H 6 /CH 4, indicating its promising potential in storage/separation of light hydrocarbons in industry.
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Cites
He, Y., Krishna, R., & Chen, B. (2012) · Energy & Environmental Science · doi:10.1039/c2ee22858k · Cited by 674
Metadata
- Authors
- Fan, W., Wang, X., Zhang, X., Liu, X., Wang, Y., Kang, Z., Dai, F., Xu, B., Wang, R., & Sun, D.
- Venue
- ACS Central Science
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-06-24
- Volume
- 5
- Issue
- 7
- Pages
- 1261-1268
- ISSN
- 2374-7943 (ISSN-L)
- 2374-7951
- OpenAlex
- W2950359197
- Cited by
- 242
- References
- 1
- FWCI
- 8.02
- Type
- journal article
- Language
- en
- Open access
- diamond
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- CoChat. (2026). Citation check: Fine-Tuning the Pore Environment of the Microporous Cu-MOF for High Propylene Storage and Efficient Separation of Light Hydrocarbons. https://app.cochat.ai/papers/10.1021/acscentsci.9b00423
- The paper
- Fan, W., Wang, X., Zhang, X., Liu, X., Wang, Y., Kang, Z., Dai, F., Xu, B., Wang, R., & Sun, D. (2019). Fine-Tuning the Pore Environment of the Microporous Cu-MOF for High Propylene Storage and Efficient Separation of Light Hydrocarbons. ACS Central Science. https://doi.org/10.1021/acscentsci.9b00423
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