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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.