Immobilization of choline chloride: Urea onto mesoporous silica for carbon dioxide capture

Research output: Contribution to journalArticle

Abstract

A green composite adsorbent based on mesoporous silica-gel (SG) and deep eutectic solvent (DES) mixture of choline chloride-urea (ChCl:U) was synthesized as an alternative for carbon dioxide (CO2) adsorption. The composite adsorbent was prepared by wet impregnation technique with various ChCl:U (mole ratio 1:2) content in SG at 5-15% (w/w). Fourier transform infrared attenuated total reflectance (ATR-FTIR) results showed successful impregnation of ChCl:U into SG with the presence of C=O carbonyl amide group stretching, N-H scissoring bending, CH2 bending and C-N stretching peaks. Thermal degradation of the adsorbent started with urea at 130°C followed by ChCl at 300°C. Meanwhile, nitrogen physisorption demonstrated a decrease in specific surface areas of the sorbents with increasing ChCl:U weight percentage due to the blockage of micropores by ChCl:U. The optimum CO2 adsorption capacity of 22.3 mg/g was achieved by 10%ChCl:U/SG200, which was higher than the immobilised SG200, hence making it relevant to become a green and economical adsorbent for CO2 capture.

Original languageEnglish
Pages (from-to)1025-1033
Number of pages9
JournalSains Malaysiana
Volume48
Issue number5
DOIs
Publication statusPublished - 1 Jan 2019

Fingerprint

Choline
Carbon Dioxide
Silicon Dioxide
Urea
Adsorbents
Silica Gel
Bending (deformation)
Impregnation
Stretching
Adsorption
Physisorption
Composite materials
Sorbents
Amides
Specific surface area
Eutectics
Fourier transforms
Pyrolysis
Nitrogen
Infrared radiation

Keywords

  • Adsorption
  • Carbon capture
  • Choline chloride
  • Deep eutectic solvent
  • Silica gel
  • Urea

ASJC Scopus subject areas

  • General

Cite this

Immobilization of choline chloride : Urea onto mesoporous silica for carbon dioxide capture. / Ghazali, Zaitun; Hassan, Nur Hasyareeda; Yarmo, Mohd. Ambar; Peng, Teh Lee; Othaman, Rizafizah.

In: Sains Malaysiana, Vol. 48, No. 5, 01.01.2019, p. 1025-1033.

Research output: Contribution to journalArticle

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