A Rod‐Packing Hydrogen‐Bonded Organic Framework with Suitable Pore Confinement for Benchmark Ethane/Ethylene Separation

Zhang, Xu; Wang, Jia‐Xin; Li, Libo; Pei, Jiyan; Krishna, Rajamani; Wu, Hui; Zhou, Wei; Qian, Guodong; Chen, Banglin; Li, Bin

doi:10.1002/ange.202100342

Cited by 32 publications

(13 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(2) Enriching with the nonpolar surfaces of pore structure to recognize the paraffins and olefins properties difference of quadrupole moment, like BUT-10 40 , PCN-250 41 , Cu(Qc) 2 42 , HOF-76 43 , and etc. 44 – 47 . However, most of these paraffin-selective adsorbents design approaches are based on the three dimensions of pore to match the size of paraffins, it reversely causes the inefficiency of single material to simultaneously identify C 2 H 6 and C 3 H 8 with different molecular size (Fig.…”

Section: Introductionmentioning

confidence: 99%

Ultramicroporous material based parallel and extended paraffin nano-trap for benchmark olefin purification

et al. 2022

View full text Add to dashboard Cite

Selective paraffin capture from olefin/paraffin mixtures could afford high-purity olefins directly, but suffers from the issues of low separation selectivity and olefin productivity. Herein, we report an ultramicroporous material (PCP-IPA) with parallel-aligned linearly extending isophthalic acid units along the one-dimensional channel, realizing the efficient production of ultra-high purity C2H4 and C3H6 (99.99%). The periodically expanded and parallel-aligned aromatic-based units served as a paraffin nano-trap to contact with the exposed hydrogen atoms of both C2H6 and C3H8, as demonstrated by the simulation studies. PCP-IPA exhibits record separation selectivity of 2.48 and separation potential of 1.20 mol/L for C3H8/C3H6 (50/50) mixture, meanwhile the excellent C2H6/C2H4 mixture separation performance. Ultra-high purity C3H6 (99.99%) and C2H4 (99.99%) can be directly obtained through fixed-bed column from C3H8/C3H6 and C2H6/C2H4 mixtures, respectively. The record C3H6 productivity is up to 15.23 L/kg from the equimolar of C3H8/C3H6, which is 3.85 times of the previous benchmark material, demonstrating its great potential for those important industrial separations.

show abstract

Section: Introductionmentioning

confidence: 99%

Ultramicroporous material based parallel and extended paraffin nano-trap for benchmark olefin purification

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Such materials may allow the preferential adsorption of C 2 H 6 having a slightly larger polarizability than C 2 H 4 . Recently, some novel microporous organometallic and organic materials, including metal–organic frameworks (MOFs), − zeolite imidazolate frameworks (ZIFs), − hydrogen-bonded organic frameworks (HOFs), − and porous organic cages (POCs), have been reported to preferentially adsorb C 2 H 6 over C 2 H 4 . Although these materials exhibit a wide range of structural and adsorption properties, several important design principles can be drawn for C 2 H 6 -selective adsorbents.…”

Section: Introductionmentioning

confidence: 99%

“…First, the adsorbents must have no open metal sites (Lewis acids) that can strongly interact with the π-electrons of C 2 H 4 (Lewis base). Second, the presence of Lewis basic moieties, such as aromatics − ,− ,− , and heteroatoms (N, ,− , O, ,,, and F), is often beneficial for improving the C 2 H 6 /C 2 H 4 selectivity. This can be explained by the fact that C 2 H 6 has six slightly polarized C δ− –H δ+ bonds and the basic moieties can interact via weak C–H···π, − ,− , C–H···N, ,,, C–H···O, ,, and C–H···F hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

“…Second, the presence of Lewis basic moieties, such as aromatics − ,− ,− , and heteroatoms (N, ,− , O, ,,, and F), is often beneficial for improving the C 2 H 6 /C 2 H 4 selectivity. This can be explained by the fact that C 2 H 6 has six slightly polarized C δ− –H δ+ bonds and the basic moieties can interact via weak C–H···π, − ,− , C–H···N, ,,, C–H···O, ,, and C–H···F hydrogen bonds. In particular, due to strong C–H···O interactions, Fe(O 2 )(dobdc) with iron(III)-peroxo moieties has been reported to exhibit remarkably higher C 2 H 6 /C 2 H 4 selectivity (4.4) than other C 2 H 6 -selective adsorbents (1.3–2.96). ,− …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design of Olefin-Phobic Zeolites for Efficient Ethane and Ethylene Separation

et al. 2023

View full text Add to dashboard Cite

Selective adsorption of ethane from a mixture of ethane (C 2 H 6 ) and ethylene (C 2 H 4 ) has emerged as an energy-efficient process for obtaining high-purity ethylene. Recently, it has been reported that some novel microporous organometallic and organic adsorbents can preferentially adsorb C 2 H 6 over C 2 H 4 . Conversely, zeolite adsorbents, which are widely used in industry due to their high stability and low material cost, generally prefer C 2 H 4 adsorption ("olefin-philic"). In this study, we carefully investigated the effects of chemical composition (Si/ Al ratio), silanol defect, and pore topology (BEA, CHA, and MFI) of zeolites to develop efficient "olefin-phobic" adsorbents. The results showed that the Si−O−(Na + )−Al (weak Lewis acid) and isolated Si− OH (weak Brønsted acid) groups in the zeolite frameworks undesirably increased the affinity for C 2 H 4 (Lewis base). Consequently, defect-free pure silica zeolites exhibited promising C 2 H 6 /C 2 H 4 selectivities (1.98−2.25), which were superior to those of Al-containing zeolites (0.26) and pure silica zeolites with abundant silanols (1.50), at 298 K and 1 bar. In particular, defect-free pure silica BEA exhibited the highest C 2 H 6 /C 2 H 4 selectivity (2.25), large C 2 H 6 uptake (2.27 mmol g −1 ), and facile regeneration at 298 K. The adsorbent enabled the efficient separation of high-purity C 2 H 4 (>99.95%) from a mixture of C 2 H 6 /C 2 H 4 with high productivity (22.98 L L −1 ). The productivity was comparable or even superior to that of recently reported C 2 H 6 -selective adsorbents. The present results provide hope for the development of efficient, stable, and scalable inorganic adsorbents for the selective C 2 H 6 adsorption.

show abstract

“…In this regard, C 2 H 6 -selective materials are researched extensively and great progress has been made. − ZIF-7 is the first reported metal organic framework (MOF) with preferential adsorption of C 2 H 6 over C 2 H 4 based on their different gate-opening pressure . Porous materials with high-density polar sites and rational occupation show a higher C 2 H 6 affinity, especially Fe 2 (O 2 ) (dobdc) with Fe-peroxo sites, which exhibits C 2 H 6 /C 2 H 4 selectivity up to 4.4, but is restricted by its instability. , The construction of an inert pore environment is demonstrated to achieve the preferential C 2 H 6 adsorption to C 2 H 4 , and the strategy has been generally validated in the cases of MOFs and hydrogen-bonded organic frameworks (HOFs), such as Cu(Qc) 2 , ZJU-HOF-1, and so forth. − Although they show great performance, their high cost and poor stability largely limited their industrial application. Activated carbons (ACs) are common industrial adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Highly Microporous Activated Carbons with Industrial Potential for Selective Adsorption of Ethane over Ethylene

Wang

Yang

Zhang

et al. 2021

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Selective capture of ethane (C2H6) from ethylene (C2H4) mixtures is critical for the direct production of polymer-grade ethylene. However, it remains a great challenge to design industrially potential porous materials with satisfied capacity and separation selectivity. Herein, we reported a series of low cost and easy-attainable biomass carbon-derived activated carbons (ACs) by alkali activation that show remarkable C2H6/C2H4 separation performance. A systematic research study was conducted to study the effects of different carbon sources, different activators, and activation temperatures on their separation performance of the corresponding afforded ACs. The C2H6 adsorption capacity (6.36 mmol g–1) and the C2H6/C2H4 (1/1 v/v) selectivity (2.6) of alkali-treated coconut shell ACs CAC-X-Y (X represents the activated temperature, Y represents the ratio of KOH/C) are superior to those of the most reported ethane-selective materials, and 99.9% purity of C2H4 could be directly obtained from C2H6/C2H4 mixtures. It is noteworthy that the cost of CAC-derived ACs is estimated to be only around $20 per kg, demonstrating their great industrial potential for gas separations.

show abstract

A Rod‐Packing Hydrogen‐Bonded Organic Framework with Suitable Pore Confinement for Benchmark Ethane/Ethylene Separation

Cited by 32 publications

References 60 publications

Ultramicroporous material based parallel and extended paraffin nano-trap for benchmark olefin purification

Ultramicroporous material based parallel and extended paraffin nano-trap for benchmark olefin purification

Design of Olefin-Phobic Zeolites for Efficient Ethane and Ethylene Separation

Highly Microporous Activated Carbons with Industrial Potential for Selective Adsorption of Ethane over Ethylene

Contact Info

Product

Resources

About