Metal-organic frameworks for C6–C8 hydrocarbon separations

Zhang, Zhaoqiang; Peh, Shing Bo; Kang, Changhui; Chai, Kungang; Zhao, Dan

doi:10.1016/j.enchem.2021.100057

Cited by 72 publications

(66 citation statements)

References 285 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The microporous materials developed over the past three decades, including metal‐organic frameworks/porous coordination polymers (MOFs/PCPs), [5–13] covalent organic frameworks (COFs), [14] metal‐organic and/or pure organic complexes/cages, [15–20] have principally provided the resolution of the finely pore tuning and engineering for the selective separation of xylene isomers. Although extensive efforts have been pursued to target such microporous materials for this very important separation, highly pX‐selective porous adsorbents have been barely realized [21,22] . In fact, most of the discovered porous materials for these separations show the co‐adsorption of the other isomers though the materials take up more pX over others.…”

Section: Figurementioning

confidence: 99%

An Adaptive Hydrogen‐Bonded Organic Framework for the Exclusive Recognition of p‐Xylene

Chen

Xie

et al. 2022

Chemistry A European J

View full text Add to dashboard Cite

Separation of xylene isomers is one of the most important but most challenging and energy‐intensive separation processes in the petrochemical industry. Here, we report an adaptive hydrogen‐bonded organic framework (HOF‐29) constructed from a porphyrin based organic building block 4,4′,4′′,4′′′‐(porphyrin‐5,10,15,20‐tetrayl) tetrabenzonitrile (PTTBN), exhibiting the exclusive molecular recognition of p‐xylene (pX) over its isomers of o‐xylene (oX) and m‐xylene (mX), as clearly demonstrated in the single crystal structure transformation and 1H NMR studies. Single crystal structure studies show that single‐crystal‐to‐single‐crystal transformation from the as‐synthesized HOF‐29 to the pX exclusively included HOF‐29⊃pX is triggered by the encapsulation of pX molecules, accompanied by sliding of the 2D layers and local distortion of the ligand, which provides multiple C−H⋅⋅⋅π interactions.

show abstract

Section: Figurementioning

confidence: 99%

An Adaptive Hydrogen‐Bonded Organic Framework for the Exclusive Recognition of p‐Xylene

Chen

Xie

et al. 2022

Chemistry A European J

View full text Add to dashboard Cite

show abstract

“…However, due to their similar physicochemical properties, the efficient separation of C 8 mixtures still remains a great challenge. 218 In 2007, Alaerts et al rstly employed a systematic investigation of two MOFs (MIL-47 and HKUST-1) for such a challenging process. 219,220 Then, Hartlieb et al reported the utilization of a CD-MOF for the separation of C 8 mixtures.…”

Section: Alkyl Aromatic Isomer Separationmentioning

confidence: 99%

Recent advances in microporous metal–organic frameworks as promising adsorbents for gas separation

Wang

Liang

et al. 2022

J. Mater. Chem. A

View full text Add to dashboard Cite

show abstract

“…[44] Presumably, implementation of shape complementarity can be beneficial to gaining volumetric uptake, which is important for fixed-bed column chromatographic separation. We compared the gravimetric/volumetric uptakes of MAF-stu-13 with those of several porous [7][8][9][10][11][12][13][14][15][16] and nonporous [17][18][19][20][21] crystals (Figure 4 e; Supporting Information, Table S7). The volumetric uptake (176.5 g L À1 ) of MAF-stu-13 exceeds those of selected materials except for an adaptive pillararene host, EtP6b, (with CH uptake 263.6 g L À1 ; however, relative uptake only 55.1 %) reported recently.…”

Section: Angewandte Chemiementioning

confidence: 99%

“…[1][2][3][4][5] In petrochemical industry cyclohexane (CH), an important feedstock in the productions of resins, nylon fibers and pharmaceutical intermediates, is mainly produced by catalytic hydrogenation of benzene (Bz). [6,7] However, the limited conversion efficiency in liquid-phase production results in miscible CH/Bz product; therefore, subsequent separation procedure is required to obtain high-purity CH (commercially pure ! 99 %).…”

mentioning

confidence: 99%

Harnessing Shape Complementarity for Upgraded Cyclohexane Purification through Adaptive Bottlenecked Pores in an Imidazole‐Containing MOF

Wang

Chen

et al. 2021

Angewandte Chemie

View full text Add to dashboard Cite

Shape complementarity is a biological craft for precisely binding substrates at protein-protein interfaces. An analogy to such a function can be drawn conceptually for crystalline porous solids; yet the manifested entities are rare in reticular chemistry. The bottleneck-shaped pores carved out of a metal-organic framework, Zn(MIBA) 2 (aka. MAF-stu-13), can perfectly accommodate benzene molecules. Remarkably, its framework adapts to the optimal guest binding-the enhanced host-guest interactions in the neck in turn minimize the guest-guest repulsion in the pore to the extent it turns into attraction-as demonstrated by the combined X-ray structural and DFT computational studies. This adaptive material can be used for liquid-phase production of ultrahigh-purity (! 99 %) cyclohexane, achieving a balance between uptake capacity and separation selectivity and surpassing the performances of other porous and nonporous crystals reported recently (e.g. product purity 99.4 % vs. 97.5 % to date).

show abstract

Metal-organic frameworks for C6–C8 hydrocarbon separations

Cited by 72 publications

References 285 publications

An Adaptive Hydrogen‐Bonded Organic Framework for the Exclusive Recognition of p‐Xylene

An Adaptive Hydrogen‐Bonded Organic Framework for the Exclusive Recognition of p‐Xylene

Recent advances in microporous metal–organic frameworks as promising adsorbents for gas separation

Harnessing Shape Complementarity for Upgraded Cyclohexane Purification through Adaptive Bottlenecked Pores in an Imidazole‐Containing MOF

Contact Info

Product

Resources

About