scholarly journals Separation of branched alkane feeds by a synergistic action of zeolite and metal-organic framework

2021 ◽  
Author(s):  
Pedro Brântuas ◽  
Adriano Henrique ◽  
Mohammad Wahiduzzaman ◽  
Alexander von Wedelstedt ◽  
Tanmoy Maity ◽  
...  
Keyword(s):  
Octane Number ◽  
Metal Organic Framework ◽  
Synergistic Action ◽  
Operating Conditions ◽  
Porous Solids ◽  
Separation Processes ◽  
Research Octane Number ◽  
Efficient Separation ◽  
Zeolite 5A ◽  
Metal Organic

Abstract Zeolites and Metal Organic Frameworks (MOFs) have frequently been considered as “competitors” for the development of new advanced separation processes. The production of high quality gasoline is currently achieved through the energy demanding conventional Total Isomerization Process (TIP) that separates pentane and hexane isomers while not reaching yet the ultimate goal of a Research Octane Number (RON) higher than 92. Herein we demonstrate how an unprecedented synergistic action of two complementary benchmark materials of each family of porous solids, a commercially available zeolite, 5A and the bio-derived Al-dicarboxylate MOF MIL-160(Al), leads to a novel adsorptive process for octane upgrading of gasoline through an efficient separation of pentane and hexane isomer mixtures into fractions of low and high research octane number (RON). This innovative mixed bed adsorbent strategy encompasses a thermodynamically-driven separation of hexane isomers according to the degree of branching by MIL-160(Al) coupled to a steric rejection of pentane and hexane linear isomers by the molecular sieve zeolite 5A. The adsorptive separation ability of this MOF/zeolite duo was further evaluated under industrial operating conditions by sorption breakthrough and continuous cyclic experiments with a mixed bed of shaped adsorbents. Remarkably, at the industrially relevant temperature of 423 K, an ideal sorption hierarchy of low RON over high RON alkanes is achieved, i.e., n-hexane >> n-pentane >> 2-methylpentane > 3-methylpentane >>> 2,3-dimethylbutane > isopentane ≈ 2,2-dimethylbutane, and an exceptional ideal productivity of 1.14 mol.dm-3 is attained for a final high RON isomers product of 92, which corresponds to a substantial leap-forward when compared with existing processes.

scholarly journals Efficient separation of 1,3-butadiene from C4 hydrocarbons by flexible metal-organic framework with gate-opening effect

2021 ◽  
Author(s):  
Wang Lu ◽  
Hongliang Huang ◽  
Zhu Hejin ◽  
Chang Yanjiao ◽  
Guo Xiangyu ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Regeneration Ability ◽  
Water Stability ◽  
Separation Processes ◽  
Efficient Separation ◽  
Gate Opening ◽  
Metal Organic ◽  
Flexible Metal ◽  
Breakthrough Experiments ◽  
Organic Framework

Efficient and economical separation of 1,3-butadiene (C4H6) from C4 hydrocarbons is imperative yet challenging in industrial separation processes. Herein, a guest-induced flexible Mn-bpdc MOF has been employed to separate C4H6 from C4 hydrocarbons, including n-butene (n-C4H8), iso-butene (iso-C4H8), n-butane (n-C4H10) and iso-butane (iso-C4H10). Significantly, C4H6 can instantaneously induce gate-opening of Mn-bpdc MOF at 0.13 bar and 298 K, thus significant amounts of C4H6 can be adsorbed, while other C4 hydrocarbons cannot induce the gate-opening even at 1 bar. The uptake selectivities of Mn-bpdc MOF for C4H6/n-C4H8 and C4H6/iso-C4H8 are up to 40.0 and 45.0 at 298 K and 1 bar, respectively, both surpassing all the reported adsorbents. In addition, breakthrough experiments verified that C4H6/n-C4H8, C4H6/iso-C4H8, C4H6/n-C4H10 and C4H6/iso-C4H10 mixture can be efficiently separated. More importantly, Mn-bpdc possesses excellent water stability and outstanding regeneration ability for C4H6 separation, making it a new benchmark for C4H6 purification.

scholarly journals Metal-Organic Framework Based Membranes for Gas Separation Processes

2012 ◽  
Vol 44 ◽  
pp. 1991-1992
Author(s):  
L.A. Neves ◽  
N. Barreto ◽  
J.C. Crespo ◽  
I.M. Coelhoso
Keyword(s):  
Gas Separation ◽  
Metal Organic Framework ◽  
Separation Processes ◽  
Metal Organic ◽  
Organic Framework

scholarly journals γ-Cyclodextrin metal–organic framework for efficient separation of chiral aromatic alcohols

RSC Advances ◽  
2017 ◽  
Vol 7 (58) ◽  
pp. 36297-36301 ◽  
Author(s):  
Cheng-Xiong Yang ◽  
Yu-Zhen Zheng ◽  
Xiu-Ping Yan
Keyword(s):  
Stationary Phase ◽  
Chiral Stationary Phase ◽  
Metal Organic Framework ◽  
Hplc Separation ◽  
Efficient Separation ◽  
Aromatic Alcohols ◽  
Metal Organic ◽  
Organic Framework

A γ-cyclodextrin metal–organic framework was applied as an efficient chiral stationary phase for HPLC separation of chiral aromatic alcohols.

A robust two–dimensional layered metal–organic framework for efficient separation of methane from nitrogen

2022 ◽  
Vol 281 ◽  
pp. 119911
Author(s):  
Fang Zheng ◽  
Lihang Chen ◽  
Rundao Chen ◽  
Zhiguo Zhang ◽  
Qiwei Yang ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Two Dimensional ◽  
Efficient Separation ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Modular Type III Porous Liquids based on Porous Organic Cage Microparticles

2021 ◽  
Author(s):  
Aiting Kai ◽  
Benjamin D. Egleston ◽  
Marc A. Little ◽  
Rob Clowes ◽  
Michael E. Briggs ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Chiral Recognition ◽  
High Thermal Stability ◽  
Operating Conditions ◽  
Porous Solids ◽  
Working Capacity ◽  
Type Iii ◽  
Carrier Liquid ◽  
Porous Microparticles ◽  
Metal Organic

The dispersion of particulate porous solids in size-excluded liquids has emerged as a method to create Type III porous liquids, mostly using insoluble microporous materials such as metal-organic frameworks (MOFs) and zeolites. Here, we present the first examples of Type III porous liquids based on porous organic cages (POCs). By exploiting the solution processability of the POCs, racemic and quasiracemic cage microparticles were formed by chiral recognition. Dispersion of these porous microparticles in a range of size-excluded liquids, including oils and ionic liquids, formed stable POC-based Type III porous liquids. The flexible pairing between the solid POC particles and a carrier liquid allows the formation of a range of compositions, pore sizes, and other physicochemical properties to suit different applications and operating conditions. For example, we show that it is possible to produce porous liquids with relatively low viscosities (7-14 mpa∙s) or high thermal stability (325 °C). A 12.5 wt. % Type III porous liquid comprising racemic POC microparticles and an ionic liquid, [BPy][NTf<sub>2</sub>], shows a CO<sub>2</sub> working capacity (104.30 μmol/g<sub>L</sub>) that is significantly higher than the neat ionic liquid (37.27 μmol/g<sub>L</sub>) between 25 °C and 100 °C. This liquid is colloidally stable and can be recycled at least 10 times without loss of CO<sub>2</sub> capacity.

Metal-Organic Framework (MOF)-Based Drug Delivery

2020 ◽  
Vol 27 (35) ◽  
pp. 5949-5969 ◽  
Author(s):  
Jian Cao ◽  
Xuejiao Li ◽  
Hongqi Tian
Keyword(s):  
Drug Delivery ◽  
Side Effects ◽  
Metal Organic Framework ◽  
Drug Loading ◽  
Metal Organic Frameworks ◽  
Research Area ◽  
Porous Solids ◽  
Future Perspectives ◽  
Composition And Structure ◽  
Metal Organic

Background: Developing a controllable drug delivery system is imperative and important to reduce side effects and enhance the therapeutic efficacy of drugs. Metal-organic frameworks (MOFs) an emerging class of hybrid porous materials built from metal ions or clusters bridged by organic linkers have attracted increasing attention in the recent years owing to the unique physical structures possessed, and the potential for vast applications. The superior properties of MOFs, such as well-defined pore aperture, tailorable composition and structure, tunable size, versatile functionality, high agent loading, and improved biocompatibility, have made them promising candidates as drug delivery hosts. MOFs for drug delivery is of great interest and many very promising results have been found, indicating that these porous solids exhibit several advantages over existing systems. Objective: This review highlights the latest advances in the synthesis, functionalization, and applications of MOFs in drug delivery, and has classified them using drug loading strategies. Finally, challenges and future perspectives in this research area are also outlined.

Efficient Separation of Xylene Isomers by a Robust Calcium-Based Metal-Organic Framework through Synergetic Thermodynamically and Kinetically Controlled Mechanism

2021 ◽  
Author(s):  
Yuhan Lin ◽  
Jian Zhang ◽  
Haardik Pandey ◽  
Xinglong Dong ◽  
Qihan Gong ◽  
...  
Keyword(s):  
Molecular Level ◽  
Metal Organic Framework ◽  
Practical Importance ◽  
Efficient Separation ◽  
Adsorptive Separation ◽  
Kinetically Controlled ◽  
Metal Organic ◽  
Xylene Isomers ◽  
Organic Framework

Adsorptive separation of physically and chemically similar molecules and understanding the underlying host-guest interactions at molecular level are of significant scientific and practical importance. Here we report the development of...

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