Highly efficient CO2 adsorption by imidazole and tetraethylenepentamine functional sorbents: Optimization and analysis using response surface methodology

Yan, Huangyu; Zhang, Guojie; Li, Jun; Li, Guoqiang; Wang, Ying

doi:10.1016/j.jece.2021.105639

Cited by 14 publications

(4 citation statements)

References 78 publications

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“…The RSM searches for a suitable approximation relationship between input and output variables to find the best operating conditions for a system or a portion of the factor field that complies with the requirements. The RSM was used to optimize the conditions of the experiment by the author Yan et al [32] for the optimization and analysis of CO 2 surface assimilation by imidazole and tetraethylenepentamine operative sorbent material.…”

Section: Response Surface Methodsmentioning

confidence: 99%

Optimization of in-Vehicle Carbon Dioxide Level in a 5-Seat Car

Jayasankar¹,

Subbaian²

2022

sv-jme

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The air quality in a car’s cabin can be five times worse than that of residential and non-residential buildings, resulting in a variety of health issues, such as headache, sore throat, and nausea, which are all symptoms of in-vehicle air pollution. The monitoring of carbon dioxide, which is one of the principal pollutants in car cabins, is required before regulating it. The current research is focused on the recording of carbon dioxide levels for different levels of human load, air speed, and temperature. A statistical analysis and plots were obtained for recorded responses to determine air quality parameters for a minimum value of carbon dioxide level in a five-seat car cabin. Three algorithms (generalized reduced gradient (GRG), response surface methodology (RSM), and Genetic Algorithm (GA)) were successfully used in a 5-seat car to optimize the in-vehicle carbon dioxide level. The GRG method provided the minimum carbon dioxide level of 471.531 ppm for a one-human load at an air speed of 2 m/s and a temperature of 24 °C. For varying human loads of 2,3,4, and 5, the GRG and GA methods provided carbon dioxide levels of 508.785 ppm, 580.722 ppm, 659.839 ppm and 769.016 ppm, respectively. Comparing all three techniques, the RSM provided carbon dioxide levels of 471.876 ppm, 508.865 ppm, 580.79 ppm, 659.905 ppm, and 769.362 ppm for human loads of 1, 2, 3, 4, and 5, respectively. This study will provide a platform for the researchers working on indoor air quality characteristics to apply soft computing techniques effectively for the evaluation of comfortable healthy environments and for the benefit of the passengers in car cabins.

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Section: Response Surface Methodsmentioning

confidence: 99%

Optimization of in-Vehicle Carbon Dioxide Level in a 5-Seat Car

Jayasankar¹,

Subbaian²

2022

sv-jme

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“…Lin et al introduced imidazole into polyelectrolyte membrane as an alkaline group and showed a good CO 2 selective separation effect [35]. Yan et al found that the introduction of imidazole improved the adsorption capacity and thermal stability of amine adsorbents [36]. Li et al demonstrated that 1-methylimidazole is a phase separator that induces phase separation and an absorption promoter that increases the absorption rate [37].…”

Section: Introductionmentioning

confidence: 99%

Aqueous 2-Ethyl-4-methylimidazole Solution for Efficient CO2 Separation and Purification

Zhang

et al. 2023

Separations

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Carbon capture and storage (CCS) technology is considered as one of the most effective short-term solutions in reducing atmospheric CO2 concentrations. A key of CCS technology is to seek the absorbent with low cost, fast absorption rate, and high stability. In this study, we show that 2-ethyl-4-methylimidazole is particularly suitable for efficient CO2 capture. The aqueous solution of 2-ethyl-4-methylimidazole displays a maximum CO2 molar absorption capacity of 1.0 mol∙mol−1 and the absorbed CO2 can be completely released through heating the solution at a relatively low temperature (<100 °C). Stability tests show that the aqueous system is quite stable, with less than 10% loss of the molar absorption capacity after eight absorption–desorption cycles. Time-related in-situ attenuated total reflection infrared absorption spectroscopy and 13C nuclear magnetic resonance spectroscopy studies reveal that the intermediates are HCO3− and H2CO3 in the process of CO2 absorption–desorption. These intermediates are easily decomposed, which are responsible for the low CO2 desorption temperature and high desorption efficiency of the system. Moreover, the aqueous solution of 2-ethyl-4-methylimidazole is able to separate and purify CO2 from flue gas and even ambient air. Consequently, 2-ethyl-4-methylimidazole is a promising low-cost CO2 absorbent for industrial implementation.

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“…Numerous studies on amine solid sorbents have focused on tetraethylenepentamine (TEPA) as the prototypical amine in the development of materials with high CO 2 adsorption capacity. − TEPA has been blended with other organic components into mesoporous supports to substantially enhance the CO 2 capture performance of amine solid sorbents. Compounds containing hydroxyl groups, such as polyethylene glycol (PEG), diethanolamine (DEA), triethanolamine (TEA), 2-(2-aminoethylamino)ethanol, and aminomethyl propanol (AMP) are the most well-studied components for blending with TEPA to improve the CO 2 adsorption performance of sorbents. ,− Adding heterocyclic amines to TEPA has been found to synergistically improved the CO 2 adsorption performance, amine efficiency, and regeneration of solid sorbents. , The CO 2 adsorption performance of TEPA-containing adsorbents reported in the literature is summarized in Table .…”

Section: Introductionmentioning

confidence: 99%

“…6,11−15 Adding heterocyclic amines to TEPA has been found to synergistically improved the CO 2 adsorption performance, amine efficiency, and regeneration of solid sorbents. 16,17 The CO 2 adsorption performance of TEPA-containing adsorbents reported in the literature is summarized in Table 1.…”

Section: Introductionmentioning

confidence: 99%

CO₂ Capture Performance and Oxidative Degradation of Tetraethylenepentamine-Containing Adsorbents: Insights into the Contribution of Each Component

Vu,

Chowdhury,

Yamada

et al. 2023

Ind. Eng. Chem. Res.

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Amine-functionalized materials have been widely investigated as promising candidates for CO2 capture. Tetraethylenepentamine (TEPA) is a commercial polyamine commonly used as a prototypical amine to develop effective adsorbents for post-combustion CO2 capture. In previous studies, TEPA has been explicitly or implicitly treated as a pure compound of a linear molecule bearing five nitrogen atoms linked by four ethylene units. However, TEPA is a mixture of four main ethyleneamine compounds, including a linear, a branched, and two cyclic structural products, with similar boiling points. The four main components of TEPA were separated and purified in this work. The CO2 adsorption performance and stability of the purified TEPA components were then investigated, clarifying the influence of the structure of the TEPA components on the adsorption performance and stability of amine solid sorbents. The CO2 adsorption performance and oxidative stability of the sorbents were found to be dependent on the structure of the TEPA components. Among the isolated TEPA components, polyamines with piperazine rings exhibited a higher amine efficiency, regeneration ability, and O2 resistance. The evidence from infrared gas chromatography, and nuclear magnetic resonance data suggests that the deactivation of TEPA components can be caused by chain cleavage, branching, and/or cross-linking, leading to the formation of new species. The results of this work could open a new approach for the further development of novel effective and stable amine solid sorbents for CO2 capture.

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Highly efficient CO2 adsorption by imidazole and tetraethylenepentamine functional sorbents: Optimization and analysis using response surface methodology

Cited by 14 publications

References 78 publications

Optimization of in-Vehicle Carbon Dioxide Level in a 5-Seat Car

Optimization of in-Vehicle Carbon Dioxide Level in a 5-Seat Car

Aqueous 2-Ethyl-4-methylimidazole Solution for Efficient CO2 Separation and Purification

CO₂ Capture Performance and Oxidative Degradation of Tetraethylenepentamine-Containing Adsorbents: Insights into the Contribution of Each Component

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Highly efficient CO2 adsorption by imidazole and tetraethylenepentamine functional sorbents: Optimization and analysis using response surface methodology

Cited by 14 publications

References 78 publications

Optimization of in-Vehicle Carbon Dioxide Level in a 5-Seat Car

Optimization of in-Vehicle Carbon Dioxide Level in a 5-Seat Car

Aqueous 2-Ethyl-4-methylimidazole Solution for Efficient CO2 Separation and Purification

CO2 Capture Performance and Oxidative Degradation of Tetraethylenepentamine-Containing Adsorbents: Insights into the Contribution of Each Component

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Product

Resources

About

CO₂ Capture Performance and Oxidative Degradation of Tetraethylenepentamine-Containing Adsorbents: Insights into the Contribution of Each Component