CO<sub>2</sub> Capture by Temperature Swing Adsorption: Working Capacity As Affected by Temperature and CO<sub>2</sub> Partial Pressure

Raganati, Federica; Chirone, Riccardo; Ammendola, Paola

doi:10.1021/acs.iecr.9b04901

Cited by 109 publications

(51 citation statements)

References 61 publications

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“…This is expected because increasing the temperature under desorption conditions results in an increase in the amount of desorbed gas, which increases Δ N CO 2 . 71 Black, blue, and red points represent COFs offering low (<10 mol/kg), moderate (between 10 and 100 mol/kg), and high (>100 mol/kg) APSs, respectively. A total of 32 (40) out of 288 COFs offer the highest APSs (>100 mol/kg) under PSA (PTSA) conditions.…”

Section: Resultsmentioning

confidence: 99%

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO₂/H₂ Separation

et al. 2020

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Covalent organic frameworks (COFs) have high potential in gas separation technologies because of their porous structures, large surface areas, and good stabilities. The number of synthesized COFs already reached several hundreds, but only a handful of materials were tested as adsorbents and/or membranes. We used a high-throughput computational screening approach to uncover adsorption-based and membrane-based CO 2 /H 2 separation potentials of 288 COFs, representing the highest number of experimentally synthesized COFs studied to date for precombustion CO 2 capture. Grand canonical Monte Carlo (GCMC) simulations were performed to assess CO 2 /H 2 mixture separation performances of COFs for five different cyclic adsorption processes: pressure swing adsorption, vacuum swing adsorption, temperature swing adsorption (TSA), pressure−temperature swing adsorption (PTSA), and vacuum−temperature swing adsorption (VTSA). The results showed that many COFs outperform traditional zeolites in terms of CO 2 selectivities and working capacities and PTSA is the best process leading to the highest adsorbent performance scores. Combining GCMC and molecular dynamics (MD) simulations, CO 2 and H 2 permeabilities and selectivities of COF membranes were calculated. The majority of COF membranes surpass Robeson’s upper bound because of their higher H 2 permeabilities compared to polymers, indicating that the usage of COFs has enormous potential to replace current materials in membrane-based H 2 /CO 2 separation processes. Performance analysis based on the structural properties showed that COFs with narrow pores [the largest cavity diameter (LCD) < 15 Å] and low porosities (ϕ < 0.75) are the top adsorbents for selective separation of CO 2 from H 2 , whereas materials with large pores (LCD > 20 Å) and high porosities (ϕ > 0.85) are generally the best COF membranes for selective separation of H 2 from CO 2 . These results will help to speed up the engineering of new COFs with desired structural properties to achieve high-performance CO 2 /H 2 separations.

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Section: Resultsmentioning

confidence: 99%

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO₂/H₂ Separation

et al. 2020

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“…The temperature of the reactor is monitored and controlled by means of a type K thermocouple linked to a PID controller. The outlet CO 2 concentration is continuously monitored by means of an analyzer provided with an infrared detector (ABB AO2020, URAS 14) (Raganati et al, 2020b). Before the carbonation tests, a pre-treatment of the limestone particles was performed; in order to obtain pure CaO, the CaCO 3 sample (100 g) is calcined (T = 900 °C) under sound-assisted fluidization conditions (150 dB-120 Hz) for 2 h and using N 2 as fluidizing gas (115 NL/h, corresponding to a superficial gas velocity of 2.5 cm/s, i.e.…”

Section: Experimental Apparatus and Proceduresmentioning

confidence: 99%

Carbonation Kinetics of Fine CaO Particles in a Sound-Assisted Fluidized Bed for Thermochemical Energy Storage

Raganati¹,

Ammendola²

2022

KONA

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The calcium-looping process, relying on the reversible calcination/carbonation of CaCO 3 , is one of the most promising solution to perform thermochemical energy storage (TCES) for concentrating solar power (CSP) plants. Indeed, CaO precursors such as limestone can rely on the high energy density, low cost, large availability and nontoxicity. In this work, the study of the sound-assisted carbonation of fine CaO particles (< 50 μm) for TCES-CSP has been furthered. In particular, a kinetic study has been performed to analyse the effect of the particular carbonation conditions to be used in TCES-CSP applications, i.e. involving carbonation under high CO 2 partial pressure and at high temperature. All the experimental tests have been performed in a lab-scale soundassisted fluidized bed reactor applying high intensity acoustic field with proper frequency (150 dB-120 Hz). The carbonation kinetics has been analysed by applying a simple kinetic model, able to properly describe the fast (under kinetic control) and slow (under diffusion control) stage of the of the reaction. In particular, the reaction rate, the intrinsic carbonation kinetic constant and the characteristic product layer thickness have been evaluated, also highlighting their dependence on the temperature between 800 and 845 °C; a value of 49 kJ mol -1 has been obtained for the activation energy. Finally, a good agreement between the conversion-time profiles, evaluated from the applied kinetic models, and the experimental data has been obtained.

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“…In this context, the sound-assisted fluidized bed reactor (SAFB) designed and set-up in Naples by our research group has proven itself as a consistent device for the fundamental and phenomenological study of the fluidization behavior of the fine/ultrafine cohesive powders at atmospheric pressure [ 2 , 54 , 55 , 66 , 67 ]. More recently, the SAFB has also been upgraded to be used for both low- and high-temperature chemical processes, such as CO 2 adsorption and Ca-looping, studied in the framework of both CCS and TCES-CSP applications [ 3 , 4 , 5 , 6 , 15 , 19 , 20 , 21 , 36 , 37 , 64 , 65 , 68 , 69 ].…”

Section: Introductionmentioning

confidence: 99%

Sound-Assisted Fluidization for Temperature Swing Adsorption and Calcium Looping: A Review

Raganati¹,

Ammendola²

2021

Materials

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Fine/ultra-fine cohesive powders find application in different industrial and chemical sectors. For example, they are considered in the framework of the Carbon Capture and Storage (CCS), for the reduction of the carbon dioxide emissions to the atmosphere, and in the framework of the thermochemical energy storage (TCES) in concentrated solar power (CSP) plants. Therefore, developing of technologies able to handle/process big amounts of these materials is of great importance. In this context, the sound-assisted fluidized bed reactor (SAFB) designed and set-up in Naples represents a useful device to study the behavior of cohesive powders also in the framework of low and high temperature chemical processes, such as CO2 adsorption and Ca-looping. The present manuscript reviews the main results obtained so far using the SAFB. More specifically, the role played by the acoustic perturbation and its effect on the fluid dynamics of the system and on the performances/outcomes of the specific chemical processes are pointed out.

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CO₂ Capture by Temperature Swing Adsorption: Working Capacity As Affected by Temperature and CO₂ Partial Pressure

Cited by 109 publications

References 61 publications

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO₂/H₂ Separation

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO₂/H₂ Separation

Carbonation Kinetics of Fine CaO Particles in a Sound-Assisted Fluidized Bed for Thermochemical Energy Storage

Sound-Assisted Fluidization for Temperature Swing Adsorption and Calcium Looping: A Review

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CO2 Capture by Temperature Swing Adsorption: Working Capacity As Affected by Temperature and CO2 Partial Pressure

Cited by 109 publications

References 61 publications

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO2/H2 Separation

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO2/H2 Separation

Carbonation Kinetics of Fine CaO Particles in a Sound-Assisted Fluidized Bed for Thermochemical Energy Storage

Sound-Assisted Fluidization for Temperature Swing Adsorption and Calcium Looping: A Review

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CO₂ Capture by Temperature Swing Adsorption: Working Capacity As Affected by Temperature and CO₂ Partial Pressure

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO₂/H₂ Separation

Computational Selection of High-Performing Covalent Organic Frameworks for Adsorption and Membrane-Based CO₂/H₂ Separation