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Fractions composition study of the pyrolysis oil obtained from sewage sludge treatment plant

In this work the parameters of Low Temperature Conversion – LTC were applied in a centrifuged sludge from a sewage treatment plant located in Rio de Janeiro, Brazil. Before the conversion, the sludge was dried and analyzed by TGA to observe its behavior with increasing temperature. | Bioresource Technology 103 2012 459-465 Contents lists available at SciVerse ScienceDirect Bioresource Technology ELSEVIER journal homepage www.elsevier.com locate biortech Fractions composition study of the pyrolysis oil obtained from sewage sludge treatment plant R.V.S. Silva G.A. Romeiro M.C.C. Veloso M.K.-K. Figueiredo P.A. Pinto A.F. Ferreira M.L.A. Goncalves A.M. Teixeira R.N. Damasceno Universidade Federal Fluminense UFF Instituto de Química Valonguinho SN Centro Niterói Rio de Janeiro CEP - 24210-150 Brazil ARTICLE INFO ABSTRACT Article history Received 14 July 2011 Received in revised form 30 September 2011 Accepted 2 October 2011 Available online 8 October 2011 Keywords Sludge Pyrolysis oil Catalysis Fuel In this work the parameters of Low Temperature Conversion - LTC were applied in a centrifuged sludge from a sewage treatment plant located in Rio de Janeiro Brazil. Before the conversion the sludge was dried and analyzed by TGA to observe its behavior with increasing temperature. The chemical composition of the crude pyrolysis oil was analyzed by FTIR 1H NMR and GC-MS. The results showed that the oil is a mixture of hydrocarbons oxygenated and nitrogenated compounds. Using a catalytic treatment it was possible to fractionate the oil where the predominant constituents were hydrocarbons showing that the cracking was effective. An important result was the difference between the calorific value of dry sludge 10 MJ kg 1 the pyrolysis oil 36 MJ kg 1 and one of the fractions separated by catalytic cracking 40 MJ kg 1 when compared with commercial diesel 45 MJ kg 1 . 2011 Elsevier Ltd. All rights reserved. 1. Introduction Technologies for thermochemical conversion of biomasses Radlein 1999 Mohan et al. 2006 Goyal et al. 2008 Demirbas and Arin 2002 or organic residues to obtain fuels have been receiving increasing interest from the scientific community governments and industry. This source of renewable energy has the potential to replace petroleum fuels and as a