Valorization of Char from Sewage Sludge Pyrolysis by Means of Gasification

N. Gil Lalaguna, V. Ruiz, J.L. Sánchez, M.B. Murillo & G. Gea
Experimental tests on sewage sludge gasification and sewage sludge-derived char gasification have been performed in a lab-scale fluidized reactor in order to evaluate how a previous pyrolysis stage affects the subsequent gasification process. The previous pyrolysis stage led to structural changes in sewage sludge that seem to enhance the subsequent gasification reactions. Tar formation was significantly reduced during char gasification and noticeable changes in the composition of the product gas were found, such as a...