CO2 adsorption capacity and kinetics in nitrogen-enriched activated carbon fibers prepared by different methods

2015 ◽  
Vol 281 ◽  
pp. 704-712 ◽  
Author(s):  
Noel Díez ◽  
Patricia Álvarez ◽  
Marcos Granda ◽  
Clara Blanco ◽  
Ricardo Santamaría ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Carbon Fibers ◽  
Co2 Adsorption ◽  
Activated Carbon Fibers ◽  
Co2 Adsorption Capacity

scholarly journals The Increase of the Micoporosity and CO2 Adsorption Capacity of the Commercial Activated Carbon CWZ-22 by KOH Treatment

10.5772/63672 ◽  
2016 ◽  
Author(s):  
Joanna Srenscek-Nazzal ◽  
Urszula Narkiewicz ◽  
Antoni W. Morawski ◽  
Rafal J. Wróbel ◽  
Beata Michalkiewicz
Keyword(s):  
Activated Carbon ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Co2 Adsorption Capacity

scholarly journals Carbon Dioxide Adsorption on Porous and Functionalized Activated Carbon Fibers

2019 ◽  
Vol 9 (10) ◽  
pp. 1977 ◽  
Author(s):  
Yu-Chun Chiang ◽  
Cheng-Yu Yeh ◽  
Chih-Hsien Weng
Keyword(s):  
Carbon Dioxide ◽  
Activated Carbon ◽  
Surface Area ◽  
Carbon Fibers ◽  
Pore Volume ◽  
Co2 Adsorption ◽  
Physical Adsorption ◽  
Koh Activation ◽  
Co2 Uptake ◽  
Activated Carbon Fibers

Polyacrylonitrile-based activated carbon fibers (ACFs), modified using potassium hydroxide (KOH) or tetraethylenepentamine (TEPA), were investigated for carbon dioxide (CO2) adsorption, which is one of the promising alleviation approaches for global warming. The CO2 adsorption isotherms were measured, and the values of isosteric heat of adsorption were calculated. The results showed that the KOH-modified ACFs exhibited a great deal of pore volume, and a specific surface area of 1565 m2/g was obtained. KOH activation made nitrogen atoms easily able to escape from the surface of ACFs. On the other hand, the surface area and pore volume of ACFs modified with TEPA were significantly reduced, which can be attributed to the closing or blocking of micropores by the N-groups. The CO2 adsorption on the ACF samples was via exothermic reactions and was a type of physical adsorption, where the CO2 adsorption occurred on heterogeneous surfaces. The CO2 uptakes at 1 atm and 25 °C on KOH-activated ACFs reached 2.74 mmole/g. This study observed that microporosity and surface oxygen functionalities were highly associated with the CO2 uptake, implying the existence of O-C coordination, accompanied with physical adsorption. Well cyclability of the adsorbents for CO2 adsorption was observed, with a performance decay of less than 5% over up to ten adsorption-desorption cycles.

Effects of surface chemical properties of activated carbon fibers modified by liquid oxidation for CO2 adsorption

2015 ◽  
Vol 353 ◽  
pp. 158-164 ◽  
Author(s):  
Byong Chol Bai ◽  
Eun Ae Kim ◽  
Chul Wee Lee ◽  
Young-Seak Lee ◽  
Ji Sun Im
Keyword(s):  
Activated Carbon ◽  
Carbon Fibers ◽  
Co2 Adsorption ◽  
Chemical Properties ◽  
Activated Carbon Fibers ◽  
Surface Chemical

scholarly journals Enhanced CO2 Adsorption on Activated Carbon Fibers Grafted with Nitrogen-Doped Carbon Nanotubes

Materials ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 511 ◽  
Author(s):  
Yu-Chun Chiang ◽  
Wei-Lien Hsu ◽  
Shih-Yu Lin ◽  
Ruey-Shin Juang
Keyword(s):  
Carbon Nanotubes ◽  
Activated Carbon ◽  
Carbon Fibers ◽  
Co2 Adsorption ◽  
Activated Carbon Fibers ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

scholarly journals Development of Rubber Seed Shell–Activated Carbon Using Impregnated Pyridinium-Based Ionic Liquid for Enhanced CO2 Adsorption

Processes ◽  
2021 ◽  
Vol 9 (7) ◽  
pp. 1161
Author(s):  
Nawwarah Mokti ◽  
Azry Borhan ◽  
Siti Zaine ◽  
Hayyiratul Mohd Zaid
Keyword(s):  
Ionic Liquid ◽  
Activated Carbon ◽  
Adsorption Capacity ◽  
Co2 Adsorption ◽  
Chemical Activation ◽  
Total Pore Volume ◽  
Isosteric Heat ◽  
Rubber Seed ◽  
Study Results ◽  
Co2 Adsorption Capacity

In this study, rubber seed shell was used for the production of activated carbon by chemical activation using an ionic liquid, [C4Py][Tf2N] as an activating agent. Sample RSS-IL 800 shows the highest specific surface area of 393.99 m2/g, a total pore volume of 0.206 cm3/g, and a micropore volume of 0.172 cm3/g. The performance of AC samples as an adsorbent for CO2 was also studied using a static volumetric technique evaluated at a temperature of 25 °C and 1 bar pressure. The CO2 adsorption capacity for sample RSS-IL 800 was 2.436 mmol/g, comparable with reported data from the previous study. Results also show that the CO2 adsorption capacity decreased at a higher temperature between 50 and 100 °C and increased at elevated pressure due to its exothermic behavior. The Langmuir model fits the adsorption data well, and the isosteric heat of adsorption proved that the physisorption process and exothermic behavior occur.

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