Characteristics, application and modeling of solid amine adsorbents for CO2 capture: A review

Li, Lin; Meng, Yuan; Ju, Tongyao; Han, Shuangfeng; Meng, Fanzhi; Li, Jinglin; Du, Yufeng; Song, Mengdi; Lan, Tian; Jiang, Jianguo

doi:10.1016/j.jenvman.2022.116438

Cited by 48 publications

(14 citation statements)

References 127 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some solid adsorbents showed the advantages of wide sources, low cost, and strong industrial operability. However, ultrafast adsorption kinetics and decent cycle stability of solid adsorbents are difficult to meet simultaneously, thus limiting their application …”

Section: Introductionmentioning

confidence: 99%

“…According to thermodynamic requirements, the adsorption enthalpy of the physical adsorbent is generally less than 40 kJ·mol –1 because of the weak physical interaction. Although these adsorbents are easy to regenerate and have thermodynamic advantages, their disadvantages are poor long-term stability and high sensitivity to temperature . Except for a few adsorbents with micropores (pore size less than 1 nm), the selective adsorption of CO 2 is poor (compared with N 2 , CH 4 , H 2 O, etc.).…”

Section: Introductionmentioning

confidence: 99%

“…However, ultrafast adsorption kinetics and decent cycle stability of solid adsorbents are difficult to meet simultaneously, thus limiting their application. 11 A reasonably designed CO 2 adsorbent should also be considered simultaneously from thermodynamic and kinetic perspectives. 12 Thermodynamically, the adsorbent should have a lower adsorption enthalpy, so the energy consumption required for the desorption of CO 2 is less during the regeneration process.…”

Section: Introductionmentioning

confidence: 99%

“…Although these adsorbents are easy to regenerate and have thermodynamic advantages, their disadvantages are poor long-term stability and high sensitivity to temperature. 11 Except for a few adsorbents with micropores (pore size less than 1 nm), the selective adsorption of CO 2 is poor (compared with N 2 , CH 4 , H 2 O, etc.). In addition, the optimal adsorption temperature of this kind of adsorbent is below room temperature, and its adsorption capacity decreases significantly within the temperature range of power plant flue gas (50−120 °C).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Song

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Under favorable regeneration conditions (120 °C, 100% CO 2 ), ultrafast adsorption kinetics and excellent long-term cycle stability are still the biggest obstacles for amine-based solid CO 2 adsorbents. Inspired by natural wood, a biochar with a highly ordered pore structure and excellent thermal conductivity was prepared and used as a carrier of organic amines to prepare ideal CO 2 adsorbents. The results showed that the prepared adsorbent has a very high adsorption working capacity (4.23 mmol CO 2 •g −1 ), and its performance remains stable even after 30 adsorption−desorption cycles in the harsh desorption environment (120 °C, 100% CO 2 ). Due to the existence of the hierarchical structure, the adsorbent exhibited ultra-fast adsorption kinetics, and the reaction rate constant is 37 times higher than that of traditional silica. This adsorbent also showed a very low regeneration heat of 1.64 MJ•kg −1 (CO 2 ), which is especially important for the practical application. Therefore, these biochar-based adsorbents derived from natural wood make the CO 2 capture process promising.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Song

Zheng

et al. 2023

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…However, these immobilized adsorbents only rely on non-covalent bonds to adsorb CO 2 , and the adsorption capacity is unsatisfactory. [20] Therefore, immobilized amines prepared with porous carriers loaded with organic amines [21][22][23] have received widespread attention due to their efficient adsorption capacity and high stability.…”

Section: Introductionmentioning

confidence: 99%

An Immobilized Amine with Improved Cyclic Performance Prepared from Carboxyl Modified Mesoporous Silica for CO₂ Capture

Zhao,

Hu,

Guan

et al. 2023

ChemistrySelect

View full text Add to dashboard Cite

Immobilized amines adsorbents have excellent CO2 adsorption capacity and low regeneration energy consumption, which have broad application prospect, but poor reusability. To improve the cyclic adsorption performance of immobolized amines for CO2 capture, the mesoporous silica A‐MSU‐J with carboxyl groups on the surface was synthesized, and immobilized amine A‐MSU‐J‐TEPA was prepared by introducing tetraethylenepentamine (TEPA) by impregnation method. The introduction of carboxyl groups onto the carrier surface can form stronger hydrogen bonds with TEPA than the initial hydroxyl groups, thus achieving stable loading of TEPA. When the TEPA load was 50 wt %, the adsorption capacity of 4A‐65MSU‐J‐50TEPA declined by only 13.7 % (from 2.58 to 2.23 mmol ⋅ g−1, at 70 °C, 0.1 Mpa) after 10 cycles, while the adsorption capacity of 65MSU‐J‐50TEPA decreased by 23.6 % (from 2 to 1.53 mmol ⋅ g−1). Furthermore, carrier pore size also affects the adsorption capacity of immobilized amines for CO2. The adsorption capacity of 4A‐65MSU‐J‐50TEPA with larger pore size (2.95 mmol ⋅ g−1, at 55 °C) is much higher than that of 4A‐25MSU‐J‐50TEPA with smaller pore size (2.17 mmol ⋅ g−1). In conclusion, improving the interaction between organic amines and the carrier surface and using carriers with larger pore size can enhance the adsorption capacity and reusability of immobolized amines adsorbents.

show abstract

Molecule‐level Design to Form Pocket Structures for Improving Amine Efficiency in CO₂ Capture

Shi,

Cao,

Zhang

et al. 2024

Adv Funct Materials

View full text Add to dashboard Cite

Solid amine adsorbents represent a promising class of CO2 sorbents, but their amine efficiency is limited by the inaccessibility of peripheral amines. The surface of mesocellular silica foam (MCF) is functionalized with the mixture of short‐chain 3‐Glycidyloxypropyl) triethoxysilane (GPTES) and long‐chain Octadecyltrimethoxysilane (OTMS), forming pocket structures on the support surface, thereby exposing more amine sites and enhancing the amine efficiency of polyethylenimine (PEI). The resulting adsorbent demonstrates a high CO2 adsorption capacity (5.02 mmol g−1 at 50 °C, 10 vol.% CO2, and 50%RH), high amine efficiency (0.43 at the dry condition), outstanding cyclic stability (0.5% performance decline per cycle under the conditions of dry CO2 regeneration), and fast adsorption kinetics (15 min for adsorption saturation at 50 °C). First‐principles calculations and CO2 temperature‐programmed desorption (TPD) experiments demonstrate that the introduction of GPTES and OTMS is beneficial to decreasing adsorption energy and forming paired carbamic acid states and ammonium carbamate states.

show abstract

Characteristics, application and modeling of solid amine adsorbents for CO2 capture: A review

Cited by 48 publications

References 127 publications

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

An Immobilized Amine with Improved Cyclic Performance Prepared from Carboxyl Modified Mesoporous Silica for CO₂ Capture

Molecule‐level Design to Form Pocket Structures for Improving Amine Efficiency in CO₂ Capture

Contact Info

Product

Resources

About

Characteristics, application and modeling of solid amine adsorbents for CO2 capture: A review

Cited by 48 publications

References 127 publications

Wood-Inspired Ultrafast High-Performance Adsorbents for CO2 Capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO2 Capture

An Immobilized Amine with Improved Cyclic Performance Prepared from Carboxyl Modified Mesoporous Silica for CO2 Capture

Molecule‐level Design to Form Pocket Structures for Improving Amine Efficiency in CO2 Capture

Contact Info

Product

Resources

About

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

Wood-Inspired Ultrafast High-Performance Adsorbents for CO₂ Capture

An Immobilized Amine with Improved Cyclic Performance Prepared from Carboxyl Modified Mesoporous Silica for CO₂ Capture

Molecule‐level Design to Form Pocket Structures for Improving Amine Efficiency in CO₂ Capture