scholarly journals Carbon Spheres as CO2 Sorbents

2019 ◽  
Vol 9 (16) ◽  
pp. 3349 ◽  
Author(s):  
P. Staciwa ◽  
U. Narkiewicz ◽  
D. Sibera ◽  
D. Moszyński ◽  
R. J. Wróbel ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Co2 Adsorption ◽  
Solvothermal Method ◽  
Carbonization Temperature ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Carbon Spheres ◽  
Potassium Oxalate ◽  
Microwave Assisted

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).

Carbon Capture Performance of Amino-Modified MIL-101 at Room Temperature

2013 ◽  
Vol 395-396 ◽  
pp. 637-640
Author(s):  
Yi Yang ◽  
Zheng Ping Wang ◽  
Ling Meng ◽  
Lian Jun Wang
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Pore Structure ◽  
Carbon Capture ◽  
Room Temperature ◽  
Ambient Pressure ◽  
Metal Organic Framework ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Before And After

MIL-101, a metal-organic framework material, was synthesized by the high-temperature hydrothermal method. Triethylenetetramine (TETA) modification enabled the effective grafting of an amino group onto the surface of the materials and their pore structure. The crystal structure, micromorphology, specific surface area, and pore structure of the samples before and after modification were analyzed with an X-ray diffractometer, scanning electron microscope, specific surface and aperture tester, and infrared spectrometer. The carbon dioxide adsorption properties of the samples were determined by a thermal analyzer before and after TETA modification. Results show that moderate amino modification can effectively improve the microporous structure of MIL-101 and its carbon dioxide adsorption properties. After modification, the capacity of MIL-101 to adsorb carbon dioxide decreased only by 0.61 wt%, and a high adsorption capacity of 9.45 wt% was maintained after six cycles of adsorption testing at room temperature and ambient pressure.

Integration of polymerized ionic liquid with graphene for enhanced CO2 adsorption

2015 ◽  
Vol 3 (1) ◽  
pp. 101-108 ◽  
Author(s):  
P. Tamilarasan ◽  
S. Ramaprabhu
Keyword(s):  
Carbon Dioxide ◽  
Ionic Liquid ◽  
Co2 Adsorption ◽  
Adsorption Properties ◽  
Carbon Dioxide Adsorption ◽  
Polymerized Ionic Liquid

In this study, we have integrated an ionic liquid (IL) or polymerized ionic liquid (PIL) with graphene to demonstrate enhanced carbon dioxide adsorption properties.

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

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5328
Author(s):  
Iwona Pełech ◽  
Daniel Sibera ◽  
Piotr Staciwa ◽  
Urszula Narkiewicz ◽  
Robert Cormia
Keyword(s):  
Co2 Adsorption ◽  
Applied Pressure ◽  
Low Pressure ◽  
Spherical Particles ◽  
Co2 Uptake ◽  
Pressure Treatment ◽  
Carbon Spheres ◽  
Potassium Oxalate ◽  
Uniform Size ◽  
Pressure Synthesis

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.

scholarly journals Adsorption of carbon dioxide on MIL53(Al), CuBTC and K- NaX zeolite

2020 ◽  
Vol 4 (3) ◽  
pp. 30-42
Author(s):  
Fehime Cakicioglu-Ozkan
Keyword(s):  
Carbon Dioxide ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Co2 Adsorption ◽  
Ultrasonic Method ◽  
Metal Organic Frameworks ◽  
Isosteric Heat ◽  
Metal Organic ◽  
Increasing Temperature

CO2 adsorption on K exchanged NaX zeolites, and metal organic frameworks (MOFs), namely Cu-BTC and MIL53 (Al) was studied at 5 °C and 25 °C.  Exchange via ultrasonic and traditional methods, was conducted at 50 °C and 70 °C. The maximum replacement of Na+ ion with K+ ion in the extra framework of zeolite was increased from 76% to 83% with increasing temperature from 50 °C to 70 °C in the ultrasonic method which is more effective than traditional one. Compared with the zeolites, the MOF adsorbents used in this work have higher Langmuir specific surface area values namely 1278, 1473 and about 1000 m2/g for MIL 53, Cu-BTC and zeolite adsorbents respectively. The resulting CO2 isotherms can be well represented by the Toth equation. Comparison of the isosteric heat of adsorption at zero loading shows that CO2 was adsorbed more weakly on MOFs than zeolites.

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