The atmospheric, vacuum and pressurized pyrolysis of used bleaching soils along with polymeric wastes to reach the valuable and economical fuels

The atmospheric, vacuum and pressurized pyrolysis of oil-rich bleached soil with polymeric wastes was investigated using a semi batch stirred reactor. Also, the gas chromatograph mass spectrometry (GC/MS) instrument was used to measure the hydrocarbon components containing paraffin, olefin, naphtehene and aromatic (PONA) and carbon number of the liquid product which the liquid products were classified to the different commercial fuel ranges. The atmospheric co-pyrolysis of oil-rich bleached soil with polyethylene tended to produce the heavy hydrocarbons while the pressurized pyrolysis decreased the products molecular weight obviously. The atmospheric co-pyrolysis of oil-rich bleached soil with polypropylene (PP) and polystyrene (PS) shifted to the medium and light fuels respectively. Also, manual filtration of the co-pyrolysis oils with the regenerated fluid cracking catalyst (FCC) at ambient temperature showed that the obtained oil from co-pyrolysis of polypropylene and bleached soil did not require re-filtration and had a very light color. The vacuum co-pyrolysis of bleached soil and the polymers produced more liquid with less cyclic compounds and lighter color compared to nitrogen pyrolysis. The pressurized pyrolysis of polyethylene and bleached soil using different carrier gases such as nitrogen, hydrogen, ethylene and propylene, tended to produce the lighter products in the commercial fuels range. Also, re-polymerization of the obtained liquid from co-pyrolysis, was carried out using benzoyl peroxide at 95 degrees C and atmospheric pressure, which only polystyrene and bleached soil co-pyrolysis product was able to take part in the polymerization process and two other co-pyrolysis products did not react with peroxide clearly. (C) 2020 Elsevier Ltd. All rights reserved.