Industrial Zeolite Applications for Gas Adsorption and Separation Processes

Pérez-Pellitero, Javier; Pirngruber, Gerhard D.

doi:10.1007/430_2020_75

Cited by 8 publications

(7 citation statements)

References 38 publications

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“…The crystallization temperature (from −90 to −53 °C) is lower than that of the pure components, due to the eutectic mixture that results . Another way of separating these compounds is via adsorption and, more specifically, via molecular sieving, taking advantage of their different sizes. , Paraxylene is the smallest of the three isomers, and thus, it may be adsorbed on a material with the right pore size, while the other components of the mixture may be excluded.…”

Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

“…The separation of p -xylene from m -xylene and ethylbenzene takes place in the liquid phase using simulated moving bed adsorption. , Even though zeolites with MFI structure are frequently used in catalytic processes to selectively produce p -xylene, the identical kinetic diameters of p -xylene and ethylbenzene prevent MFI zeolites from being used as adsorbents for their separation. Additionally the adsorption capacity of MFI is low in comparison to other zeolites.…”

Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

“…Postcombustion carbon capture deals with the separation of CO 2 from flue gases containing 3–30% of CO 2 , the rest being N 2 , residual O 2 and water, and a total pressure close to atmospheric pressure. , Apart from the already mature aqueous amine absorption technology for CCS, promising technologies for CCS from postcombustion streams include chemical looping, adsorption, and membrane processes, but these need to be improved in order to allow for wider deployment of CCS processes. ,,, Carbon capture by adsorption may be carried out by pressure-vacuum swing adsorption or temperature swing adsorption techniques. , In either case, the interplay betweeen adsorbent properties and process features determines the overall performance , of a certain adsorbent–process pair. Furthermore, detailed energetic and cost analysis allows us to discern between potentially and practically applicable adsorbents.…”

Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

See 2 more Smart Citations

Zeolites in Adsorption Processes: State of the Art and Future Prospects

2022

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Zeolites have been widely used as catalysts, ion exchangers, and adsorbents since their industrial breakthrough in the 1950s and continue to be state-of the-art adsorbents in many separation processes. Furthermore, their properties make them materials of choice for developing and emerging separation applications. The aim of this review is to put into context the relevance of zeolites and their use and prospects in adsorption technology. It has been divided into three different sections, i.e., zeolites, adsorption on nanoporous materials, and chemical separations by zeolites. In the first section, zeolites are explained in terms of their structure, composition, preparation, and properties, and a brief review of their applications is given. In the second section, the fundamentals of adsorption science are presented, with special attention to its industrial application and our case of interest, which is adsorption on zeolites. Finally, the state-of-the-art relevant separations related to chemical and energy production, in which zeolites have a practical or potential applicability, are presented. The replacement of some of the current separation methods by optimized adsorption processes using zeolites could mean an improvement in terms of sustainability and energy savings. Different separation mechanisms and the underlying adsorption properties that make zeolites interesting for these applications are discussed.

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Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

Section: Chemical Separations By Zeolitesmentioning

confidence: 99%

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Zeolites in Adsorption Processes: State of the Art and Future Prospects

2022

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“…It has been shown that, porous adsorbents are efficient and feasible choices to capture and remove ammonia or separate ammonia from mixtures. , Porous adsorbents can be operated at relatively low cost under environmental conditions. Currently, solid adsorbents such as zeolite, activated carbon, and metal oxides have attracted widespread attention. As a new type of material, metal–organic frameworks (MOFs) also show great potential …”

Section: Introductionmentioning

confidence: 99%

“… 23 , 24 Porous adsorbents can be operated at relatively low cost under environmental conditions. Currently, solid adsorbents such as zeolite, 25 activated carbon, 26 and metal oxides 27 have attracted widespread attention. As a new type of material, metal–organic frameworks (MOFs) also show great potential.…”

Section: Introductionmentioning

confidence: 99%

Computational Screening of Metal–Organic Frameworks for Ammonia Capture from H₂/N₂/NH₃ Mixtures

Zhu

Wang

et al. 2022

ACS Omega

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The separation of ammonia from H2/N2/NH3 mixtures is an important step in ammonia decomposition for hydrogen production and ammonia synthesis from H2 and N2 based nonaqueous technologies. Metal–organic frameworks (MOFs) are considered as potential materials for capturing ammonia. In the present work, high-throughput screening of 2932 Computation-Ready Experimental MOFs (CoRE MOFs) was carried out for ammonia capture from H2/N2/NH3 mixtures by Grand Canonical Monte Carlo (GCMC) simulations. It was found that the high-performing MOFs are characterized by tube-like channels, moderate LCD (largest cavity diameter) (4–7.5 Å), and high Q st 0(NH3) (the isosteric heat of NH3 adsorption) (>45 kJ/mol). MOFs with high NH3 adsorption capacity often feature moderate surface area, while the surface area of MOFs with high NH3 selectivity is relatively lower, which limits the NH3 adsorption capacity. Q st 0 and the Henry’s constant (K H ) are two energy descriptors describing the interactions between adsorbents and adsorbates. The former has a stronger correlation with the adsorption selectivity, while the latter has a stronger correlation with the adsorption capacity. By analyzing the molecular density distribution of adsorbates in high-performing MOFs, it was found that unsaturated coordinated metal sites provide the main functional binding sites for NH3. Most MOFs with high NH3 selectivity have multiple different metal nodes or other atoms except C, O, and H, such as N and P. Multiple metal nodes and nonmetallic atoms provide more functional binding sites. Finally, the adsorption behavior with various concentrations of gas mixtures was examined to verify the universality of the screening calculations, and the effect of framework flexibility on adsorption performance was explored.

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The Reinforced Separation of Intractable Gas Mixtures by Using Porous Adsorbents

Ke,

Xiong,

Fang

et al. 2024

Advanced Materials

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This review focuses on the mechanism and driving force in the intractable gas separation using porous adsorbents. A variety of intractable mixtures have been discussed, including air separation, carbon capture, and hydrocarbon purification. Moreover, the separation systems are categorized according to distinctly biased modes depending on the minor differences in the kinetic diameter, dipole/quadruple moment, and polarizability of the adsorbates, or sorted by the varied separation occasions (e.g., CO2 capture from flue gas or air) and driving forces (thermodynamic and kinetic separation, molecular sieving). Each section highlights the functionalization strategies for porous materials, like synthesis condition optimization and organic group modifications for porous carbon materials, cation exchange and heteroatom doping for zeolites, and metal node‐organic ligand adjustments for MOFs. These functionalization strategies are subsequently associated with enhanced adsorption performances (capacity, selectivity, structural/thermal stability, moisture resistance, etc.) toward the analog gas mixtures. Finally, this review also discusses future challenges and prospects for using porous materials in intractable gas separation. Therein, the combination of theoretical calculation with the synthesis condition and adsorption parameters optimization of porous adsorbents may have great potential, given its fast targeting of candidate adsorbents and deeper insights into the adsorption forces in the confined pores and cages.

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Industrial Zeolite Applications for Gas Adsorption and Separation Processes

Cited by 8 publications

References 38 publications

Zeolites in Adsorption Processes: State of the Art and Future Prospects

Zeolites in Adsorption Processes: State of the Art and Future Prospects

Computational Screening of Metal–Organic Frameworks for Ammonia Capture from H₂/N₂/NH₃ Mixtures

The Reinforced Separation of Intractable Gas Mixtures by Using Porous Adsorbents

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Industrial Zeolite Applications for Gas Adsorption and Separation Processes

Cited by 8 publications

References 38 publications

Zeolites in Adsorption Processes: State of the Art and Future Prospects

Zeolites in Adsorption Processes: State of the Art and Future Prospects

Computational Screening of Metal–Organic Frameworks for Ammonia Capture from H2/N2/NH3 Mixtures

The Reinforced Separation of Intractable Gas Mixtures by Using Porous Adsorbents

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Product

Resources

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Computational Screening of Metal–Organic Frameworks for Ammonia Capture from H₂/N₂/NH₃ Mixtures