Introduction of cross-linking agents to enhance the performance and chemical stability of polyethyleneimine-impregnated CO2 adsorbents: Effect of different alkyl chain lengths

Jeon, Sunbin; Min, Jinseo; Kim, Sung Hyun; Lee, Ki Bong

doi:10.1016/j.cej.2020.125531

Cited by 27 publications

(10 citation statements)

References 44 publications

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“…Much of the literature exploring PEI oxidation has focused on before and after snapshots of the chemical structure of PEI remaining on the sorbent following exposure at a single set of conditions. ,,, While insightful, these methods are not particularly useful in estimating sorbent lifetime. In some cases, assessment of sorbent stability under cyclic conditions has been explored, usually limited to hundreds of cycles. ,,,, However, the economic viability of sorbents requires a lifetime of many thousands of cycles, an extremely cumbersome and expensive undertaking to directly measure, and one that will only be explicitly relevant at the particular conditions chosen for the experiment.…”

Section: Introductionmentioning

confidence: 99%

“…In some cases, assessment of sorbent stability under cyclic conditions has been explored, usually limited to hundreds of cycles. 20,23,25,28,38 However, the economic viability of sorbents requires a lifetime of many thousands of cycles, 37 an extremely cumbersome and expensive undertaking to directly measure, and one that will only be explicitly relevant at the particular conditions chosen for the experiment.…”

Section: ■ Introductionmentioning

confidence: 99%

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Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO₂ Sorbents

Nezam

Xie²,

Golub

et al. 2021

ACS Sustainable Chem. Eng.

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The oxidative degradation rates of a CO 2 sorbent composed of a mesoporous alumina impregnated with poly-(ethylenimine) (PEI) are measured under systematically varied conditions and a reaction rate law is created. Good agreement is shown between the rate of oxidation obtained via in situ calorimetric heat measurement during oxidative degradation reactions and the loss of CO 2 capture performance presented as amine efficiency (mol CO 2 /mol amine). PEI mass loss and elemental composition are tracked over the course of the reaction and used in conjunction with the oxidation rate measurements to shed insight into the oxidation reaction(s). These data, in combination with measurements of the heat of reaction, suggest a common reaction set across the range of temperatures, oxygen concentrations, and sorbent compositions tested. The data are consistent with the basic autoxidation scheme (BAS), the accepted mechanism of autoxidation of aliphatic polymers. We propose a lumped kinetic model to describe the oxidation reaction set and estimate an activation energy of 105 kJ/mol and an oxygen reaction order of 0.5−0.7 from the data accordingly. These parameters can be incorporated into process cycle models to estimate the material lifetime, a critical uncertainty in the deployment of DAC technologies.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO₂ Sorbents

Nezam

Xie²,

Golub

et al. 2021

ACS Sustainable Chem. Eng.

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show abstract

“…Notably, this finding was generally overlooked in previous studies. Most investigations concluded that amine types and temperatures were the main factors affecting the resistance to CO 2 -induced degradation, but ignored the critical role of porous support types. , Overall, the selection of appropriate supports for PEI functionalization could effectively inhibit the degradation due to the CO 2 purging regeneration approach, and the resistance was also demonstrated in some reported non–SiO 2 -based adsorbents. , …”

Section: Results and Discussionmentioning

confidence: 99%

Insights into the Critical Role of Abundant-Porosity Supports in Polyethylenimine Functionalization as Efficient and Stable CO₂ Adsorbents

Meng

et al. 2021

ACS Appl. Mater. Interfaces

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The emerging polyethylenimine (PEI)-functionalized solid adsorbents have witnessed significant development in the implementation of CO2 capture and separation because of their decent adsorption capacity, recyclability, and scalability. As an indispensable substrate, the importance of selecting porous solid supports in PEI functionalization for CO2 adsorption was commonly overlooked in many previous investigations, which instead emphasized screening amine types or developing complex porous materials. To this end, we scrutinized the critical role of different commercial porous supports (silica, alumina, activated carbon, and polymeric resins) in PEI impregnation in this study, taking into account multiple perspectives. Hereinto, the present results identified that abundant larger pore structures and surface functional groups were conducive to loading a considerable amount of PEI molecules. Various supports after PEI functionalization had great differences in adsorption capacities, amine efficiencies, and the corresponding optimal temperatures. In addition, more attention was paid to the role of porous supports in long-term stability during the consecutive adsorption–regeneration cycles, while N2 and CO2 purging as regeneration strategies, respectively. Especially, CO2-induced degradation due to urea species formation was specifically recognized in a SiO2-based adsorbent, which would induce serious concerns in CO2 cyclic capture. On the other side, we also confirmed that adopting conventional porous supports, for example, HP20, could achieve superior adsorption performance (above 4 mmol CO2/g) and cyclic stability (around 1% loss after 30 cycles) rather than the ones synthesized through complex approaches, which ensured the availability and scalability of PEI-functionalized CO2 adsorbents.

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“…Nevertheless, some other parameters that affect the CO2 adsorption capacity such as amine loading, porous support, adsorption temperature, and different flow conditions. There is also a study of modification PEI through crosslinking by jeon and coworkers that resulting in improve on CO2 adsorption in terms stability [18].…”

Section: Pei Impregnated Adsorbents For Co2 Capturementioning

confidence: 99%

“…This is because the flue gas that was produced from the industry not only contains CO2 but also contains other impurities. From table 1, there are several studies that are related to the difference of flow conditions towards CO2 adsorption that conduct the presence of nitrogen gas (N2) [18,24], oxygen gas (O2) [27,30] and water (H2O) [30]. Zhou and coworkers have studied the presence of N2 in flow conditions as much of 12 volume percentage (12v%CO2:88v%N2) of PEI-Mobil Composition of Matter-550 (PEI-MCM-550) have reduced the adsorption performance from 2.32 mmol/g to 1.89 mmol/g.…”

Section: 4effect Of Different Flow Conditions Toward Adsorption Perfo...mentioning

confidence: 99%

Amine (Polyethyleneimine)-modified solid adsorbent for CO₂ capture

Rani

Hitam

Taib

2022

J. Phys.: Conf. Ser.

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The increase in the concentration of carbon dioxide (CO2) gas in the atmosphere has led to various severe negative consequences. There are numerous methods for the reduction of CO2 that have been introduced such as chemical and physical absorption, organic liquid scrubbing, amine-based absorption, etc. Adsorption by using solid adsorbents is one of the promising methods that has been widely studied by researchers. The performance of the adsorbents can be enhanced by functionalized with diverse types of promoters. This review is discussing the performance of polyethyleneimine (PEI) as a promoter towards the adsorption of CO2. To achieve high effective PEI-adsorbents, the percentage of PEI amine loading, type of porous support, temperature, and different flow conditions are among the important parameters that need to be considered. The chemical stability of PEI can be improved through modification crosslinking of PEI. Hence in this review, the effect of amine loading, porous support, temperature, slow condition and crosslinking of PEI to its CO2 adsorption performance is observed.

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Introduction of cross-linking agents to enhance the performance and chemical stability of polyethyleneimine-impregnated CO2 adsorbents: Effect of different alkyl chain lengths

Cited by 27 publications

References 44 publications

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO₂ Sorbents

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO₂ Sorbents

Insights into the Critical Role of Abundant-Porosity Supports in Polyethylenimine Functionalization as Efficient and Stable CO₂ Adsorbents

Amine (Polyethyleneimine)-modified solid adsorbent for CO₂ capture

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Introduction of cross-linking agents to enhance the performance and chemical stability of polyethyleneimine-impregnated CO2 adsorbents: Effect of different alkyl chain lengths

Cited by 27 publications

References 44 publications

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO2 Sorbents

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO2 Sorbents

Insights into the Critical Role of Abundant-Porosity Supports in Polyethylenimine Functionalization as Efficient and Stable CO2 Adsorbents

Amine (Polyethyleneimine)-modified solid adsorbent for CO2 capture

Contact Info

Product

Resources

About

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO₂ Sorbents

Chemical Kinetics of the Autoxidation of Poly(ethylenimine) in CO₂ Sorbents

Insights into the Critical Role of Abundant-Porosity Supports in Polyethylenimine Functionalization as Efficient and Stable CO₂ Adsorbents

Amine (Polyethyleneimine)-modified solid adsorbent for CO₂ capture