Resilient silica-based aerogels with organic and inorganic molecular hybrid structure prepared by a novel self-catalyzed gelling strategy for efficient heat insulation and CO2 adsorption

Zhang, Zhen; Zhao, Shuang; Li, Kunfeng; Fei, Zhifang; Luo, Zhongyi; Chen, Guobing; Yang, Zichun

doi:10.1016/j.cej.2023.141579

Cited by 9 publications

(4 citation statements)

References 61 publications

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“…3c [40]. The high-resolution spectrum of N 1s could be separated into two peaks at 398.1 eV and 399.7 eV, which were attributed to N-H and N-C bonds, respectively [41]. The corresponding elemental analysis is presented in Table 1.…”

Section: Characterization Of the Samplesmentioning

confidence: 98%

Study of Amino-Modified Resorcinol-Formaldehyde Aerogels for Odorous Gas Removal

Zhu,

Liu,

et al. 2024

Preprint

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When it comes to owning pets, pet odor is a major concern for many individuals. Ammonia (NH3) and hydrogen sulfide (H2S) are the primary odor components that have negative effects on human life. Therefore, there is an urgent need to develop a deodorizing material with high NH3 and H2S adsorption capacity. In this study, Resorcinol-formaldehyde (RF) aerogels containing amine groups (RF-Mx) were prepared using the sol-gel method and atmospheric pressure drying technique. Melamine was used as a modifier. The specific surface area of the modified aerogel was 119 m2/g with an average pore size of 12 nm when the melamine addition was 20%. The adsorption capacity of RF-M20 for odor was the highest (NH3: 593.8 mg/g, H2S: 640 mg/g), which was significantly superior to the unmodified sample. In addition, the adsorption capacity of RF-M20 for H2S exceeded that of commercial activated carbon. The results concluded that the introduction of amine groups and the higher microporous specific surface area benefited the chemical and physical adsorption of gases, effectively improving the adsorbent's capacity to capture NH3 and H2S. The preparation method is not only efficient in enhancing the odor adsorption capacity but also simple and cost-effective to operate, showing promising potential for industrial applications.

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Section: Characterization Of the Samplesmentioning

confidence: 98%

Study of Amino-Modified Resorcinol-Formaldehyde Aerogels for Odorous Gas Removal

Zhu,

Liu,

et al. 2024

Preprint

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“…Their surface chemistry can be easily tailored by surface grafting and in situ copolymerization. Moreover, silica aerogels have a high specific surface area and porosity, interconnective pore structure, and large pore size compared with other mesoporous solids, which favors the CO 2 diffusion and interaction with surface functional groups. − Besides, the silica aerogels with a simple and cost-effective manufacturing technique have been industrialized and commercialized, which are competitive candidates for DAC. Amine-functionalized silica aerogels showed high CO 2 capture performances including high capacity, low regeneration temperature, fast adsorption kinetics, high amine efficiency, and excellent cyclic stability. − However, silica aerogels, as well as most other adsorbents, available for CO 2 capture are powdery, which can lead to a high pressure drop or blockage of the fixed bed. ,, Pelletizing of powdery adsorbents leads to an obvious decrease in the CO 2 adsorption capacity, and the use of monolithic adsorbents can limit gas diffusion.…”

Section: Introductionmentioning

confidence: 99%

Use of Ball Drop Casting and Surface Modification for the Development of Amine-Functionalized Silica Aerogel Globules for Dynamic and Efficient Direct Air Capture

Kong,

Liu,

Liu

et al. 2024

ACS Appl. Mater. Interfaces

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Amine-functionalized silica aerogel globules (AFSAGs) were first synthesized via a simple ball drop casting method followed by amine grafting. The effect of grafting time on the structure and CO 2 adsorption performance of the AFSAGs was investigated. The CO 2 adsorption performance was comprehensively studied by breakthrough curves, adsorption capacity and rates, surface amine loading and density, amine efficiency, adsorption halftime, and cyclic stability. The results demonstrate that prolonging the grafting time does not lead to a significant increase in surface amine content owing to pore space blockage by superabundant amine groups. The CO 2 adsorption performance shows obvious dependence on surface amine density, determined by both the surface amine content and specific surface area, and working temperature. AFSAGs with a grafting time of 24 h (AFSAG24) with a moderate surface amine density have optimal CO 2 adsorption capacities, which are 1.78 and 2.14 mmol/g at 25 °C with dry and humid 400 ppm CO 2 , respectively. The amine efficiency of AFSAG24 with low CO 2 concentrations, 0.38−0.63 with dry 400 ppm−1% CO 2 , is the highest among the reported amine-functionalized adsorbents. After estimation with different diffusion models, the CO 2 adsorption process of AFSAG24 is governed by film diffusion and intraparticle diffusion. In the range of 1−4 mm, the ball size does not affect the CO 2 adsorption capacity of AFSAG24 obviously. AFSAG24 offers significant advantages for practical direct air capture compared with its state-of-the-art counterparts, such as high dynamic adsorption capacity and amine efficiency, excellent stability, and outstanding adaptation to the environment.

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“…15,16 Therefore, the development of carbon capture materials with high efficiency and high performance is the biggest challenge faced by CCUS technology. 17,18 A variety of solid adsorbents, including zeolite, 19,20 metal−organic framework (MOF), 21,22 silica material, 23,24 and carbonaceous material 25−27 can be used for CO 2 capture; however, porous carbon with advantages of relatively low renewable energy, high specific surface area, chemical stability, cost effectiveness, and manufacturing maturity has been widely studied. 28 Yet different modification techniques, like material activation or element doping, can enhance the functionality of porous carbon materials and produce a superior CO 2 capture effect.…”

Section: Introductionmentioning

confidence: 99%

“…The adsorption material is also one of the research focuses of researchers at home and abroad. In recent years, the applications of CCUS technology have been restricted because of the high cost of the process of carbon capture, among which the capture efficiency and performance of captured materials are key factors affecting the cost of CO 2 capture. , Therefore, the development of carbon capture materials with high efficiency and high performance is the biggest challenge faced by CCUS technology. , A variety of solid adsorbents, including zeolite, , metal–organic framework (MOF), , silica material, , and carbonaceous material − can be used for CO 2 capture; however, porous carbon with advantages of relatively low renewable energy, high specific surface area, chemical stability, cost effectiveness, and manufacturing maturity has been widely studied . Yet different modification techniques, like material activation or element doping, can enhance the functionality of porous carbon materials and produce a superior CO 2 capture effect. , Selecting adsorbents with considerable CO 2 adsorption capacity, rapid adsorption kinetics, and forceful selectivity and stability of CO 2 and N 2 for experiment and simulation are the key to improving CO 2 capture .…”

Section: Introductionmentioning

confidence: 99%

Study on the CO₂ Capture Separation Process by Temperature Swing Adsorption Based on Nitrogen-Doped Porous Carbon

Du,

Zheng,

Ren

et al. 2023

Energy Fuels

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CO 2 capture technology is a crucial method to achieve global carbon emission reduction, and the benefits of the physical adsorption method in the post-combustion CO 2 capture technology are low energy usage and running costs. Nitrogendoped porous carbon is selected as a solid adsorbent due to its high specific surface area and excellent adsorption selectivity. This study uses nitrogen-doped porous carbon prepared in experiment to determine its main properties, and the adsorption equilibrium isotherm is fitted. The adsorption bed model is established using ANSYS Fluent to simulate the heat and mass transfer of the adsorption process and fluid flow and is verified by the published experimental data. Temperature swing adsorption (TSA) is divided into three stages: adsorption, desorption, and cooling. The effects of different inlet velocities and porosities on adsorption and desorption performance are studied. The results reveal that the mesh verification and experimental verification are in good agreement with the results so that the numerical model can be used for species transport processes of various sizes, geometric shapes, and other mixed gases. It is essential to mention that this adsorption cycle process can recover excellent purity and decent recovery and productivity of product gases, which is of great significance for the practical application and industrialization of carbon capture technology.

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Resilient silica-based aerogels with organic and inorganic molecular hybrid structure prepared by a novel self-catalyzed gelling strategy for efficient heat insulation and CO2 adsorption

Cited by 9 publications

References 61 publications

Study of Amino-Modified Resorcinol-Formaldehyde Aerogels for Odorous Gas Removal

Study of Amino-Modified Resorcinol-Formaldehyde Aerogels for Odorous Gas Removal

Use of Ball Drop Casting and Surface Modification for the Development of Amine-Functionalized Silica Aerogel Globules for Dynamic and Efficient Direct Air Capture

Study on the CO₂ Capture Separation Process by Temperature Swing Adsorption Based on Nitrogen-Doped Porous Carbon

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Resilient silica-based aerogels with organic and inorganic molecular hybrid structure prepared by a novel self-catalyzed gelling strategy for efficient heat insulation and CO2 adsorption

Cited by 9 publications

References 61 publications

Study of Amino-Modified Resorcinol-Formaldehyde Aerogels for Odorous Gas Removal

Study of Amino-Modified Resorcinol-Formaldehyde Aerogels for Odorous Gas Removal

Use of Ball Drop Casting and Surface Modification for the Development of Amine-Functionalized Silica Aerogel Globules for Dynamic and Efficient Direct Air Capture

Study on the CO2 Capture Separation Process by Temperature Swing Adsorption Based on Nitrogen-Doped Porous Carbon

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Study on the CO₂ Capture Separation Process by Temperature Swing Adsorption Based on Nitrogen-Doped Porous Carbon