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Value-added performance of processed cardboard and farm breeding compost by pyrolysis
- Ghorbel, L., Rouissi, T., Brar, S.K., López-González, D., Ramirez, A.A., Godbout, S.
- Waste management 2015 v.38 pp. 164-173
- biochar, breeding, carbon dioxide, carbon monoxide, cardboard, composts, ecological footprint, farms, heat, mass spectrometry, pyrolysis, renewable energy sources, statistical analysis, temperature profiles, thermal properties, thermogravimetry, value added, waste management, Canada
- This study aims to underline the huge potential in Canada of adding value to cardboard and compost as a renewable fuel with a low ecological footprint. The slow pyrolysis process of lined cardboard and compost blend was investigated. Thermal behavior was investigated by thermogravimetric analysis coupled with mass spectrometry (TGA-MS). The thermal profiles are presented in the form of TGA/DTG curves. With a constant heating rate of 10°C/min, two parameters, temperature and time were varied. Cardboard decomposition occurred mostly between 203°C and 436°C, where 77% of the sample weight was decomposed. Compost blend decomposition occurred mostly between 209°C and 373°C, with 23% of weight. The principal gaseous products that evolved during the pyrolysis were H2O, CO and CO2. As a result, slow pyrolysis led to the formation of biochar. High yield of biochar from cardboard was found at 250°C for a duration of 60min (87.5%) while the biochar yield from the compost blend was maintained constant at about 31%. Finally, kinetic parameters and a statistical analysis for the pyrolysis process of the cardboard and compost samples have been investigated. Both materials showed a favorable thermochemical behavior. However, unlike cardboard, compost pyrolysis does not seem a promising process because of the low superior calorific and biochar values.