Addition of water in calcium based adsorbent for CO2 adsorption: Experimental and isotherm modelling studies

Nurulhuda Azmi, Nor Adilla Rashidi, Suzana Yusup, Khalik Mohamad Sabil

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)


In this work, a combined process of adsorption and gas hydrate formation is proposed as an alternative approach for the separation of carbon dioxide (CO2) content from gas stream. The objective of this research is to study adsorption isotherms of the CO2 gas onto the synthesized calcium oxide (CaO) via a static volumetric method at 2 °C at a different amount of water ratio (Rw). A large increment of CO2 adsorption was observed on the wetted sample due to formation of CO2 hydrates, particularly at high pressure. The highest adsorption capacity was obtained at Rw of 0.67. The experimental data of CO2 adsorption isotherms for Rw = 0 and Rw = 0.67 are further analyzed by five isotherm models which are Langmuir, Freundlich, Redlich-Peterson (R-P), Toth and Sips. The Freundlich model satisfactorily describes the CO2 adsorption onto the dried sample, whilst the R-P model is best fitted for the wetted sample.

Original languageEnglish
Title of host publicationChemical Engineering Transactions
PublisherItalian Association of Chemical Engineering
Number of pages6
ISBN (Electronic)9788895608426
Publication statusPublished - Oct 2016

Publication series

NameChemical Engineering Transactions
ISSN (Electronic)2283-9216

ASJC Scopus subject areas

  • Chemical Engineering(all)


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