Investigation on activated semi-coke desulfurization

Article type: Research Article

Authors: SHANGGUAN, Ju | LI, Zhuan-li | LI, Chun-hu

Affiliations: Key Laboratory for Coal Science and Technology of Ministry of Education and Shanxi Provice, Institute for Chemical Engineering of Coal, Taiyuan University of Technology, Taiyuan 030024, China

Note: [] Corresponding author. E-mail: [email protected]

Abstract: An activated semi-coke with industrial-scale size was prepared by high-pressure hydrothermal chemistry activation, HNO_3 oxidation and calcination activation in proper order from Inner Mongolia Zhalainuoer semi-coke, which is rich in resource and cheap in sale. SO_2 adsorption capacity on this activated semi-coke was assessed in the fixed bed in the temperature range of 60–170°C, space velocity range of 500–1300 h^{-1}, SO_2 concentration of 1000–3000 ppmv, and N_2 as balance. The surface area, elemental and proximate analysis for both raw semi-coke and activated semi-cokes were measured. The experimental results showed that the activated semi-coke has a high adsorption capacity for sulfur dioxide than the untreated semi-coke. This may be the result of increase of surface area on activated semi-coke and surface oxygen functional groups with basicity characteristics. Comparison to result of FTIR, it is known that group of –C–O–C– may be active center of SO_2 catalytic adsorption on activated semi-coke.

Keywords: activated semi-coke, high-pressure hydrothermal chemistry, activation, desulfurization

Journal: Journal of Environmental Sciences, vol. 17, no. 1, pp. 91-94, 2005