General pore features for one-step C<sub>2</sub>H<sub>4</sub> production from a C2 hydrocarbon mixture

Zhang, Tao; Cao, Jianjun; Zhang, Shuyi; Feng, He; Li, Ye; Wang, Yu; Chen, Juan; Wang, Teng; Chen, Kai‐Jie

doi:10.1039/d2cc00177b

Cited by 16 publications

(11 citation statements)

References 41 publications

(45 reference statements)

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“…44 This MOF possesses a large Brunauer−Emmett−Teller (BET) surface area and suitable pocket pores for efficient gas adsorption. 45 To enhance the adsorption properties, we introduced fluoride-functionalized pores by replacing the BDC ligand with 2,3,5,6-tetrafluoroterephthalic acid (TFBDC) and 2,5-bis(trifluoromethyl)terephthalic acid (BTFM). The inclusion of F atoms in TFBDC and BTFM significantly improved the interaction between the MOF framework and light hydrocarbon gases (Figure 1).…”

Section: ■ Introductionmentioning

confidence: 99%

“…In this study, we employed an MOF, specifically DMOF-1 (where BDC is terephthalic acid and DABCO is 1,4-diazabicyclo[2.2.2]octane), as a representative host material . This MOF possesses a large Brunauer–Emmett–Teller (BET) surface area and suitable pocket pores for efficient gas adsorption . To enhance the adsorption properties, we introduced fluoride-functionalized pores by replacing the BDC ligand with 2,3,5,6-tetrafluoroterephthalic acid (TFBDC) and 2,5-bis(trifluoromethyl)terephthalic acid (BTFM).…”

Section: Introductionmentioning

confidence: 99%

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Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C₂H₆ and C₃H₈ from Natural Gas

Yan,

Zheng,

Song

et al. 2024

ACS Appl. Mater. Interfaces

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Purifying C 2 H 6 /C 3 H 8 from a ternary natural gas mixture through adsorption separation is an important but challenging process in the petrochemical industry. To address this challenge, the industry is exploring effective strategies for designing high-performance adsorbents. In this study, we present two metal−organic frameworks (MOFs), DMOF-TF and DMOF-(CF 3 ) 2 , which have fluorinated pores obtained by substituting linker ligands in the host material. This pore engineering strategy not only provides suitable pore confinement but also enhances the adsorption capacities for C 2 H 6 /C 3 H 8 by providing additional binding sites. Theoretical calculations and transient breakthrough experiments show that the introduction of F atoms not only improves the efficiency of natural gas separation but also provides multiple adsorption sites for C 2 H 6 /C 3 H 8 −framework interactions.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C₂H₆ and C₃H₈ from Natural Gas

Yan,

Zheng,

Song

et al. 2024

ACS Appl. Mater. Interfaces

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“…In recent decades, MOFs [6][7][8][9][10][11][12] have been studied widely in separations and purifications for hydrocarbons [13][14][15][16][17][18][19][20][21][22][23][24]. However, the molecular sizes (3:3 × 3:3 × 5:7 Å 3 for C 2 H 2 , 3:2 × 3:3 × 5:4 Å 3 for CO 2.2.…”

Section: Introductionmentioning

confidence: 99%

Highly Selective Separation of C₂H₂/CO₂ and C₂H₂/C₂H₄ in an N-Rich Cage-Based Microporous Metal-Organic Framework

Yang

Xie

et al. 2023

Adsorption Science & Technology

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The separation of acetylene (C2H2) from carbon dioxide (CO2) and the purification of ethylene (C2H4) from C2H2 are quite essential processes for the chemical industry. However, these processes are challenging due to their similar physical properties, including molecule sizes and boiling points. Herein, we report an N-rich cage-based microporous metal-organic framework (MOF), [Cd5(Tz)9](NO3) (termed as Cd-TZ, TZ stands for tetrazole), and its highly efficient separation of C2H2/CO2 and C2H2/C2H4. Single-component gas adsorption isotherms reveal that Cd-TZ exhibits high C2H2 adsorption capacity (3.10 mmol g-1 at 298 K and 1 bar). The N-rich cages in Cd-TZ can trap C2H2 with a higher isosteric heat of adsorption (40.8 kJ mol-1) than CO2 and C2H4 owing to the robust host-guest interactions between the noncoordinated N atoms and C2H2, which has been verified by molecular modeling studies. Cd-TZ shows a high IAST selectivity for C2H2/CO2 (8.3) and C2H2/C2H4 (13.3). The breakthrough simulations confirm the potential for separating C2H2/CO2 and the purification of C2H4 from C2H2.

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“…Nevertheless, achieving the reversed adsorption order of C 2 H 6 > C 2 H 4 remains a significant challenge, especially considering the typical adsorption order is C 2 H 6 < C 2 H 4 . Currently, constructing polar narrow channels or smaller pockets to enhance C 2 H 2 /C 2 H 4 and C 2 H 6 /C 2 H 4 selectivity was the common strategy for one-step C 2 H 4 purification, and the open metal sites with abundant π electrons (Mg 2+ , Ag + , Fe 2+ , Cu 2+ , etc.) were not desirable, since this would enhance the C 2 H 4 uptake.…”

mentioning

confidence: 99%

Flow Channel with Wrinkles and Calcium Sites in a Ca-MOF for Direct One-Step Ethylene Purification from C2 Gases and MTO Products Separation

Zhao,

Guo,

Chen

et al. 2024

Inorg. Chem.

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The strategy of flow channel with wrinkles and calcium sites for single-step C 2 H 4 purification from C2 gases and methanol-to-olefins (MTO) products separation was realized in FJI-Y9. The adsorption amounts showed a total reversal order of C 3 H 6 > C 2 H 6 > C 2 H 2 > C 2 H 4 at 298 K. Modeling indicated that the wrinkles and Ca 2+ facilitated the full contact of C 3 H 6 and C 2 H 6 . Breakthrough experiments illustrated that FJI-Y9 could yield pure C 2 H 4 in a single step with a productivity of 0.78 mmol g −1 . In a lone adsorption/desorption cycle for MTO product separation, the productivities of C 3 H 6 and C 2 H 4 were 1.96 and 1.29 mol g −1 , standing as the highest recorded values.

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General pore features for one-step C₂H₄ production from a C2 hydrocarbon mixture

Abstract: Herein we proposed the required general pore features for one-step C2H4 production from C2 hydrocabon mixture: (i) non-metallic binding site; (ii) polar pore surface; (iii) narrow pocket. Four representative MOFs...

Cited by 16 publications

References 41 publications

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C₂H₆ and C₃H₈ from Natural Gas

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C₂H₆ and C₃H₈ from Natural Gas

Highly Selective Separation of C₂H₂/CO₂ and C₂H₂/C₂H₄ in an N-Rich Cage-Based Microporous Metal-Organic Framework

Flow Channel with Wrinkles and Calcium Sites in a Ca-MOF for Direct One-Step Ethylene Purification from C2 Gases and MTO Products Separation

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General pore features for one-step C2H4 production from a C2 hydrocarbon mixture

Abstract: Herein we proposed the required general pore features for one-step C2H4 production from C2 hydrocabon mixture: (i) non-metallic binding site; (ii) polar pore surface; (iii) narrow pocket. Four representative MOFs...

Cited by 16 publications

References 41 publications

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C2H6 and C3H8 from Natural Gas

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C2H6 and C3H8 from Natural Gas

Highly Selective Separation of C2H2/CO2 and C2H2/C2H4 in an N-Rich Cage-Based Microporous Metal-Organic Framework

Flow Channel with Wrinkles and Calcium Sites in a Ca-MOF for Direct One-Step Ethylene Purification from C2 Gases and MTO Products Separation

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General pore features for one-step C₂H₄ production from a C2 hydrocarbon mixture

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C₂H₆ and C₃H₈ from Natural Gas

Microporous Fluorinated MOF with Multiple Adsorption Sites for Efficient Recovery of C₂H₆ and C₃H₈ from Natural Gas

Highly Selective Separation of C₂H₂/CO₂ and C₂H₂/C₂H₄ in an N-Rich Cage-Based Microporous Metal-Organic Framework