Supercritical Drying of Carbon Aerogel

Authors

  • สุทัชชา รื่นรส
  • สุรชัย ฮ้อถาวรพัฒน์
  • จินตวัฒน์ ไชยชนะวงศ์
  • สุรัตน์ อารีรัตน์

Keywords:

Solvent Exchange,, Carbon Aerogel Microspheres,, Dielectric Constant,, Surface Area

Abstract

This research studied the preparation of carbon aerogel microspheres by the sol-gel polycondensation. This process is followed by solvent exchange, supercritical carbon dioxide drying method and carbonization. The effects of solvent type such as ethanol, acetone and isopropanol in solvent exchange process and pressure in supercritical carbon dioxide drying of 105, 125 and 145 bar on the particle and porous properties were studied. The result shows that solvent in solvent exchange process affects on the surface area of carbon aerogel significantly. This could be explained by solubility and dielectric constant. Carbon aerogel microsphere by using isopropanol as solvent in solvent exchange process and pressure in supercritical carbon dioxide drying of 145 bar has average diameter of 54 - 56 µm and  BET surface area of 927 m2/g. Carbon aerogel microspheres by solvent exchange process and pressure in supercritical carbon dioxide drying of 105 bar was observed for phenol adsorption. The result shows that carbon aerogel microspheres by using isopropanol as solvent had adsorption capacity 91 mg /g at constant temperature 30 ºC.

References

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Published

2020-06-16

How to Cite

[1]
รื่นรส ส. ., ฮ้อถาวรพัฒน์ ส. ., ไชยชนะวงศ์ จ. ., and อารีรัตน์ ส. ., “Supercritical Drying of Carbon Aerogel”, Eng. & Technol. Horiz., vol. 32, no. 1, pp. 31–36, Jun. 2020.

Issue

Vol. 32 No. 1 (2015): ่๋January - March

Section

Research Articles

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