OP-II-3

PP-III-2Table1. Percentages of different lumps, in mass.LumpsThermalpyrolysisCatalytic pyrolysiswith HZSM-5Catalytic pyrolysiswith HYC 5 -C 10 fraction 46.96 38.6 11.04C 5isoprene6.825.2119.9110.732.3710.73C 6 1.23 4.44 1.05C 7 1.02 2.63 1.01C 8 2.19 1.21 0.48C 9 0.76 0.22 0.12C 10dl-limonene34.9425.5310.197.686.013.82Aromatic fraction 12.30 28.59 36.66C 6 -C 10Tar (C 10+ ) 40.74 32.81 52.30This different product distribution obtained with HZSM-5 and HY catalyst is aconsequence of the higher micropore size of the HY zeolite (7.8 Å versus 5.6 Å ofHZSM-5 zeolite), which gives way to a higher proportion of aromatic compounds.If we focus on the composition of aromatic fraction, in the case of HZSM-5 zeolitethe most abundant compounds are benzene, toluene and xylenes, while in the caseof HY zeolite C 9 and C 10 benzene derives and naphthalene are in higher proportion.With respect to tar fraction, in thermal pyrolysis PAH represents only 2.42%, withHZSM-5 catalyst 6.23% and with HY catalyst increases until 34.25% in mass.References[1]. Williams P.T.; Brindle A. J. J. Anal. Appl. Pyrolysis, 67, 2003, 143-164.[2]. Olazar M., Aguado R., Velez D., Arabiourrutia, M. & Bilbao, J., Ind. Eng. Chem Res., 44(11),2005, 3918-3924.AcknowledgementsThis work was carried out with the financial support of the University of the BasqueCountry (Project GIU06/21)and the Ministry of Science and Education of the SpanishGovernment (Project CTQ2004-01562/PPQ).445