An Experimental and Kinetic Study of the Sorption of Carbon Dioxide onto Amine-Treated Oil Fly Ash

Mohammed A. Saad, Jaber Al Marri, Ali L. Yaumi, Ibnelwaleed A. Hussein, Reyad Shawabkeh

Research output: Contribution to journalArticle

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Abstract

A new CO2 adsorbent is produced from waste oil fly ash (OFA). Ammonium hydroxide solution is used to convert OFA to activated carbon. Then, the product is used for the adsorption of CO2 from a nitrogen/carbon dioxide (N2/CO2) gas mixture. The OFA samples are characterized by several techniques. Chemical treatment of OFA considerably changed its surface morphology. In particular, its surface area, as determined by BET measurements, increased from 59 to 318 m2/g. The amine-functionalized ash had a monolayer adsorption capacity of 74.51 mg/g and was obtained at relative pressure, 0.05 < p / p s < 0.35. A kinetics study showed that the CO2 adsorption capacity of OFA increased with increasing CO2 flow rates and concentrations and decreasing the relative humidity. Unlike physical adsorption, the chemisorption process resulted in increased adsorption capacity with increasing temperatures over the range 0-40°C. We also found that the adsorption process was endothermic (80-173 kJ/mol). The isotherm data for the adsorption process were fitted using different models. The saturation capacity determined from the Sips model, which corresponds to the sum of the saturation capacities of all of the adsorbed layers, was 540.3 mg/g of ash.

Original languageEnglish
Article number6021798
JournalJournal of Chemistry
Volume2016
DOIs
Publication statusPublished - 1 Jan 2016
Externally publishedYes

Fingerprint

Coal Ash
Carbon Dioxide
Amines
Sorption
Adsorption
Kinetics
Ashes
Ammonium Hydroxide
Chemisorption
Gas mixtures
Activated carbon
Adsorbents
Surface morphology
Isotherms
Monolayers
Atmospheric humidity
Nitrogen
Flow rate

ASJC Scopus subject areas

  • Chemistry(all)

Cite this

An Experimental and Kinetic Study of the Sorption of Carbon Dioxide onto Amine-Treated Oil Fly Ash. / Saad, Mohammed A.; Al Marri, Jaber; Yaumi, Ali L.; Hussein, Ibnelwaleed A.; Shawabkeh, Reyad.

In: Journal of Chemistry, Vol. 2016, 6021798, 01.01.2016.

Research output: Contribution to journalArticle

Saad, Mohammed A. ; Al Marri, Jaber ; Yaumi, Ali L. ; Hussein, Ibnelwaleed A. ; Shawabkeh, Reyad. / An Experimental and Kinetic Study of the Sorption of Carbon Dioxide onto Amine-Treated Oil Fly Ash. In: Journal of Chemistry. 2016 ; Vol. 2016.
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