Preparation and characterisation of carbon spheres for carbon dioxide capture

Sibera, D.; Narkiewicz, U.; Kapica, J.; Serafin, Jarosław; Michalkiewicz, Beata; Wróbel, Rafał; Morawski, Antoni W.

doi:10.1007/s10934-018-0601-8

Cited by 24 publications

(26 citation statements)

References 29 publications

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“…In our previous paper [33], chemical activation of carbon spheres using a similar amount of potassium oxalate monohydrate was achieved. In the case of the materials prepared with potassium oxalate monohydrate, two activation mechanisms can be distinguished.…”

Section: Discussionmentioning

confidence: 99%

“…Previous research obtained in this research community has been promising [33,34]. In the present work, we describe more in depth research on the influence of modificator and carbonization temperature on surface area, porosity, and carbon dioxide adsorption.…”

Section: Introductionmentioning

confidence: 95%

“…In order to improve synthesis conditions of carbon nanospheres, microwave assisted solvothermal reactor has been used [33,34]. Performing the reaction in a common autoclave takes a significant amount of time, often several hours, while the reaction in microwave assisted solvothermal reactor is very fast, about 15 min.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Spheres as CO2 Sorbents

et al. 2019

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Microporous nanocarbon spheres were prepared by using a microwave assisted solvothermal method. To improve the carbon dioxide adsorption properties, potassium oxalate monohydrate and ethylene diamine (EDA) were employed, and the influence of carbonization temperature on adsorption properties was investigated. For nanocarbon spheres containing not only activator, but also EDA, an increase in the carbonization temperature from 600 °C to 800 °C resulted in an increase of the specific surface area of nearly 300% (from 439 to 1614 m2/g) and an increase of the CO2 adsorption at 0 °C and 1 bar (from 3.51 to 6.21 mmol/g).

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

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Carbon Spheres as CO2 Sorbents

et al. 2019

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“…After treatment in the autoclave, the products were dried for 48 h at 80 • C and then carbonized in a high-temperature furnace (HST 12/400 Carbolite) (Carbolite, Derbyshire, UK) under argon atmosphere with the temperature increasing from 20 to 350 • C at a heating rate of 1 • C/min and holding time 2 h and from 350 to 700 • C at a heating rate of 1 • C/min. The carbonization temperature (700 • C) was chosen based on our previous research [10,18]. When a temperature of 700 • C was reached, carbonization continued for 2 h. Afterwards, the sample was cooled to room temperature under argon atmosphere.…”

Section: Materials Preparationmentioning

confidence: 99%

“…In the latter approach, reactants are placed in various types of metal autoclaves and usually heated to a (rather low) desired temperature. Recently, microwave reactors have attracted more attention as a new efficient heating method [ 17 , 18 ]. Several parameters, e.g., carbon source, temperature, pH, or reaction time, can influence the morphology and properties of carbon spheres.…”

Section: Introductionmentioning

confidence: 99%

Pressureless and Low-Pressure Synthesis of Microporous Carbon Spheres Applied to CO2 Adsorption

et al. 2020

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In this work, low-pressure synthesis of carbon spheres from resorcinol and formaldehyde using an autoclave is presented. The influence of reaction time and process temperature as well as the effect of potassium oxalate, an activator, on the morphology and CO2 adsorption properties was studied. The properties of materials produced at pressureless (atmospheric) conditions were compared with those synthesized under higher pressures. The results of this work show that enhanced pressure treatment is not necessary to produce high-quality carbon spheres, and the morphology and porosity of the spheres produced without an activation step at pressureless conditions are not significantly different from those obtained at higher pressures. In addition, CO2 uptake was not affected by elevated pressure synthesis. It was also demonstrated that addition of the activator (potassium oxalate) had much more effect on key properties than the applied pressure treatment. The use of potassium oxalate as an activator caused non-uniform size distribution of spherical particles. Simultaneously higher values of surface area and total pore volumes were reached. A pressure treatment of the carbon materials in the autoclave significantly enhanced the CO2 uptake at 25 °C, but had no effect on it at 0 °C.

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