Amine modification on kaolinites to enhance CO2 adsorption

Yen Hua Chen, De Long Lu

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


The objective of our study was to prepare an effective and low-cost adsorbent for CO2 capture and to provide detailed analyses of adsorption-related properties. For this purpose, we treat the naturally abundant kaolinite with amines using the wet impregnation method. The thermogravimetric analysis indicates that the CO2 adsorption capacity of kaolinite (3.3mg/g) can be enhanced through amine modification and increases with an increase in amine loading. In terms of amine-modified parameters, it is observed that kaolinite modified with 4MEA+1EDA with 50wt% has the best CO2 adsorption capacity (149.0mg/g). We also speculate, based on X-ray diffraction and Fourier transformation infrared spectroscopy results, that CO2 adsorption onto amine-modified kaolinite occurs through chemical adsorption. This further substantiates the conclusion that the inexpensive and commonly available kaolinite is a potential solid carrier and is also a good adsorbent for CO2 capture with amine modification.

Original languageEnglish
Pages (from-to)47-51
Number of pages5
JournalJournal of Colloid And Interface Science
Publication statusPublished - 2014 Dec 5

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry


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