Abstract—Waste material was pyrolyzed in a horizontal tubular reactor at 530-540°C using different catalysts, such as activated carbon, MCM-41, HZSM-5 and their mixtures. Products were investigated by gas-chromatography, EDXRFS and standardized methods. Catalysts significantly affected the yields of volatiles; e.g. HZSM-5 catalyst increased especially the yield of gaseous hydrocarbons, while MCM-41 catalyst was responsible for increasing the pyrolysis oil yield. Synergistic effects were found using mixtures of different catalysts. Furthermore the catalysts modified the main carbon frame of the products. Pyrolysis oil obtained over HZSM-5 catalyst contained large amounts of aromatics, while MCM-41 catalyst mainly isomerized the carbon frame. Regarding contaminants it was concluded, that the sulphur content could be significantly decreased by activated carbon, however it had only a slight effect to the other properties of the products.
Index Terms—Pyrolysis, catalyst, gas-chromatography, utilization.
N. Miskolczi is with the Chemical Engineering and Process Engineering Institute, MOL Department of Hydrocarbon and Coal Processing, University of Pannonia, Veszprém, 10 Egyetem u., 8200, Hungary (e-mail: mnorbert@ almos.uni-pannon.hu).
C. Wu is with the School of Engineering, University of Hull, Hull, HU6 7RX, UK (e-mail: c.wu@hull.ac.uk).
P .T. Williams is with the School of Cehemical & Process Engineering, University of Leeds, Leeds, LS2 9JT, UK (e-mail: p.t.williams@leeds.ac.uk).
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Cite: Norbert Miskolczi, Chunfei Wu, and Paul T. Williams, "Pyrolysis of Waste Plastics Using Catalysts: Activated Carbon, MCM-41 and HZSM-5," International Journal of Chemical Engineering and Applications vol. 8, no. 1, pp. 67-74, 2017.
