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Drying of Coals by Using Supercritical Carbon Dioxide

Yoshio Iwai,* Michitaka Amiya,^† Tadaaki Murozono, and Yasuhiko Arai

Department of Chemical Systems and Engineering, Graduate School of Engineering, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812-8581, Japan

Kinya Sakanishi

Institute of Advanced Material Study, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-0811, Japan

Ind. Eng. Chem. Res., 1998, 37 (7), pp 2893–2896

DOI: 10.1021/ie9709493

Publication Date (Web): May 21, 1998

Abstract

Drying of three types of coals (Witbank coal, Taiheiyo coal, and Brau coal) was carried out by using supercritical carbon dioxide at 313.2 K and 14.8 MPa. Further, other adsorbent samples (wet zeolite and wet activated carbon) were adopted for comparison. Experimental results show that it is very difficult to extract water from wet zeolite but easy to extract water from wet activated carbon and coals.

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