Amine-functionalization of multi-walled carbon nanotubes for adsorption of carbon dioxide

Meei Mei Gui, Yan Xin Yap, Siang Piao Chai*, Abdul Rahman Mohamed

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Carbon nanotubes (CNTs) have emerged as one of the potential support materials for adsorption of carbon dioxide (CO2) because of their specific surface morphology and unique chemical characteristics. CNTs are well known with their large surface area, porous structure and excellent chemical and thermal stability. They can be effectively used as support materials in the development of high efficient adsorbents to capture CO2 from the emission sources, which are normally present in relatively high temperature. In this study, adsorbents for capturing CO2 were prepared from the modification of multi-walled carbon nanotubes (MWCNTs) with 3(aminopropyl)- triethoxysilane. The modification of MWCNTs was performed in various conditions to study the key factors affecting the quality of the adsorbents, including the presence of solvent, thermal treatment and functionalization duration. The effects of solvent, functionalization duration and thermal treatment were found to be significant in the functionalization process. High quality amine-functionalized MWCNTs were obtained in the presence of toluene with thermal treatment. A maximum CO2 uptake of 74 mg/g adsorbent was achieved from the adsorbent developed in this study.

Original languageEnglish
Pages (from-to)262-270
Number of pages9
JournalAsia-Pacific Journal of Chemical Engineering
Volume8
Issue number2
DOIs
Publication statusPublished - 01 Mar 2013
Externally publishedYes

Keywords

  • amine-functionalization
  • carbon nanotubes
  • CO adsorption
  • thermal treatment

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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