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Liu, Xiuwu; Zhou, Li; Fu, Xin; Sun, Yan; Su, Wei; Zhou, Yaping

doi:10.1016/j.ces.2006.11.005

Cited by 131 publications

(5 citation statements)

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“…A viable methodology for greenhouse gases capture is adsorption at mild conditions, because the adsorbents materials are easily modifiable, reusable, and adsorption is a low energetic process [2][3][4]. Some materials have been tested as adsorbents for greenhouse gases, for example, zeolites [5,6], alumina [7], mesoporous silica [8][9][10][11], and porous carbons (graphite, carbon nanotubes, and carbon fibers) [3,[12][13][14][15]. Particularly, ideal CO 2 adsorbents should comply with the following characteristics: a high specific surface area, homogenous micro-and mesopores, and many active sites on the surfaces, such as amine functional groups and basic metal oxide [13].…”

Section: Introductionmentioning

confidence: 99%

“…The electrospinning process consists of the use of polymer solutions subjected to a high voltage difference to force the generation of polymer fibers [25][26][27]. The most used polymer for this process is polyacrylonitrile (PAN), mainly due to its high thermal deformation resistance and carbon yield [8,9,12,28]. After the formation of PAN microfibers (PANMFs), a thermal process is necessary to obtain CMF, which involves two heat sequential treatments: (i) Stabilization at temperatures between 250 to 300 • C in an oxidizing atmosphere (air); and (ii) carbonization at temperatures above 600 • C in an inert atmosphere (nitrogen) [24,[29][30][31].…”

Section: Introductionmentioning

confidence: 99%

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Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Ojeda-López

Esparza-Schulz

Pérez-Hermosillo

et al. 2019

Fibers

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Carbon microfibers (CMF) has been used as an adsorbent material for CO2 and CH4 capture. The gas adsorption capacity depends on the chemical and morphological structure of CMF. The CMF physicochemical properties change according to the applied stabilization and carbonization temperatures. With the aim of studying the effect of stabilization temperature on the structural properties of the carbon microfibers and their CO2 and CH4 adsorption capacity, four different stabilization temperatures (250, 270, 280, and 300 °C) were explored, maintaining a constant carbonization temperature (900 °C). In materials stabilized at 250 and 270 °C, the cyclization was incomplete, in that, the nitrile groups (triple-bond structure, e.g., C≡N) were not converted to a double-bond structure (e.g., C=N), to form a six-membered cyclic pyridine ring, as a consequence the material stabilized at 300 °C resulting in fragile microfibers; therefore, the most appropriate stabilization temperature was 280 °C. Finally, to corroborate that the specific surface area (microporosity) is not the determining factor that influences the adsorption capacity of the materials, carbonization of polyacrylonitrile microfibers (PANMFs) at five different temperatures (600, 700, 800, 900, and 1000 °C) is carried, maintaining a constant temperature of 280 °C for the stabilization process. As a result, the CMF chemical composition directly affects the CO2 and CH4 adsorption capacity, even more directly than the specific surface area. Thus, the chemical variety can be useful to develop carbon microfibers with a high adsorption capacity and selectivity in materials with a low specific surface area. The amount adsorbed at 25 °C and 1.0 bar oscillate between 2.0 and 2.9 mmol/g adsorbent for CO2 and between 0.8 and 2.0 mmol/g adsorbent for CH4, depending on the calcination treatment applicated; these values are comparable with other material adsorbents of greenhouse gases.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Ojeda-López

Esparza-Schulz

Pérez-Hermosillo

et al. 2019

Fibers

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“…Even though greater sorption capacity can be achieved with amine-impregnated solids by high amine loading, it results in significant decrease of surface area and pore volume, causing a large diffusion resistance (Samanta et al, 2012;Sayari et al, 2011). The number of candidates identified and proposed for CO 2 capture in the class of solid amines is huge (Liu et al, 2007;Zelenak et al, 2008). However, most of them are in the early development stage, and require further investigation, particularly with respect to kinetics and thermal effects.…”

Section: Amine Solid Sorbentsmentioning

confidence: 98%

Progress in hydrotalcite like compounds and metal-based oxides for CO2 capture: a review

Bhatta

Seetharamu

Chengala

et al. 2015

Journal of Cleaner Production

195

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“…Several techniques including cryogenic distillation, membrane separation, solvent absorption, and adsorption have achieved extensive applications in the removal and separation of CO 2 from various gas mixtures. Owing to the relatively low energy consumption, high performance of separation, and high rate of recovery, pressure swing adsorption is considered one of the most promising technologies. , A variety of ordered nanoporous materials have been used as efficient adsorbents for capturing CO 2 from different gas resources, − such as metal–organic frameworks (MOFs), covalent organic frameworks (COFs), and zeolites. It has been found that many MOF materials exhibit promising CO 2 adsorption capacity under high pressures.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Size-Selective Adsorption of CO₂/CH₄ on ETS-4 via Ion-Exchange Coupled with Thermal Treatment

Peng

Chen

Fang

et al. 2023

Ind. Eng. Chem. Res.

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ETS-4 shows great potential to achieve effective separation of challenging mixtures due to its promising tunability of pores. However, the regulation of pore size is largely limited by its low thermal stability. Here, Na-ETS-4 was synthesized by the hydrothermal method and additionally modified via ion exchange coupled with thermal treatment. Structures of all synthesized samples were examined using a variety of characterization techniques. Both adsorption equilibrium and kinetics of CO2 and CH4 on these adsorbents were evaluated on custom-made adsorption units. In addition, the mechanism of CO2 adsorption on different structural models of ETS-4 was revealed via combining with the molecular dynamics (MD) simulations. Ion exchange largely improves the thermal stability of ETS-4 and its adsorption capacities for CO2 and CH4. Ba-ETS-4-350 exhibits the largest equilibrium selectivity of 12.42 and the greatest Henry’s selectivity of 2178.51. The radial distribution function (RDF) results reveal the main adsorption sites of CO2 in different ETS-4 structures.

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Adsorption and regeneration study of the mesoporous adsorbent SBA-15 adapted to the capture/separation of CO2 and CH4

Cited by 131 publications

References 20 publications

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Progress in hydrotalcite like compounds and metal-based oxides for CO2 capture: a review

Enhancing Size-Selective Adsorption of CO₂/CH₄ on ETS-4 via Ion-Exchange Coupled with Thermal Treatment

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Adsorption and regeneration study of the mesoporous adsorbent SBA-15 adapted to the capture/separation of CO2 and CH4

Cited by 131 publications

References 20 publications

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Improve in CO2 and CH4 Adsorption Capacity on Carbon Microfibers Synthesized by Electrospinning of PAN

Progress in hydrotalcite like compounds and metal-based oxides for CO2 capture: a review

Enhancing Size-Selective Adsorption of CO2/CH4 on ETS-4 via Ion-Exchange Coupled with Thermal Treatment

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Product

Resources

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Enhancing Size-Selective Adsorption of CO₂/CH₄ on ETS-4 via Ion-Exchange Coupled with Thermal Treatment