Coal gasification fine slag as a precursor to prepare mesoporous carbon materials by an activation-hydrothermal two-step method for CO adsorption.

Coal gasification fine slag (CGFS) is a solid waste produced from gasification process, which consists of residual carbon with porous structure and minerals. The capture of CO by porous materials is an effective method for reducing CO emissions from industrial sources. In this work, the effective separation of residual carbon and ash from CGFS was achieved by froth flotation.