Characterization of the Different Oils Obtained through the Catalytic In Situ Pyrolysis of Polyethylene Film from Municipal Solid Waste Quesada, Lucía Calero De Hoces, Francisca Mónica Martín Lara, María Ángeles Pérez Muñoz, Antonio Paucar Sánchez, Marco Favio Blázquez García, Gabriel Polyethylene Plastic pyrolysis Catalysis Zeolites Characterization Waste recycling This work is part of the project PID2019-108826RB-I00 funded by MCIN/AEI/10.13039/501100011033. Nowadays, the thermal and catalytic decomposition of plastic wastes by pyrolysis is one of the best alternatives to convert these wastes into quality fuel oils, thus replenishing some petroleum resources. This work studied the catalytic pyrolysis of polyethylene film waste from the remaining organic fraction on different catalysts under dynamic operating conditions in a batch reactor. These catalysts have been characterized through isotherms of adsorption-desorption with N2 and X-ray powder diffraction for structural characterization to see the differences in their use. The results obtained have been compared with the pyrolysis of the same material without a catalyst. Special attention has been paid to the similarities and differences with thermal pyrolysis. The characterization of the liquid fraction, including physical and chemical properties, has been carried out. The liquid yield varies from 37 to 43%; it has good calorific values of 46–48 MJ/kg, an average density of 0.82 g/cm3, and a fairly low viscosity compared to the product without the catalyst. Other properties like the American Petroleum Institute (API) gravity or pH were also determined and found to be similar to conventional fuels. Oils are mainly composed of paraffins, naphthenes, and aromatic hydrocarbons. The general distribution of carbons is C7 to C31. Finally, a detailed analysis of the composition of liquid products shows they present heavy naphtha, kerosene, and diesel fractions in different proportions in the function of the catalyst used. 2022-05-12T12:26:50Z 2022-05-12T12:26:50Z 2022-04-16 info:eu-repo/semantics/article Quesada, L... [et al.]. Characterization of the Different Oils Obtained through the Catalytic In Situ Pyrolysis of Polyethylene Film from Municipal SolidWaste. Appl. Sci. 2022, 12, 4043. [https://doi.org/10.3390/app12084043] http://hdl.handle.net/10481/74816 10.3390/app12084043 eng http://creativecommons.org/licenses/by/3.0/es/ info:eu-repo/semantics/openAccess Atribución 3.0 España MDPI