Experimental study on furfural residue combustion in a fluidized bed

This paper presents proximate analysis, minimum fluidization velocity and ignition temperature measured in a fluidized bed apparatus. Ultimate analysis of ash by EDAX and thermogravimetric analyses of furfural residue are also made. The effect of ultimate analysis of ash on agglomeration is emphatically studied. The results explain the reason why agglomeration does not take place in bed, as the ash mainly consists of K₂SO₄ which leads to higher melting point of ash. Furfural residue contains high content of chlorine, but such content is very low in ash. This means that the chlorine is mainly converted to HCl, which may cause corrosion of heating surface. The formation of PCDFs may take place when the combustion is incomplete. Reasonable combustion temperature and residence time are proposed.