Catalytic pyrolysis of biomass-plastic wastes in the presence of MgO and MgCO3 for hydrocarbon-rich oils production
2019
Yuan, Rui | Shen, Yafei
This work comparatively studied the catalytic effect of MgO and MgCO₃ on pyrolysis of rice husk (RH). The apparent activation energy (E) was reduced significantly by pyrolysis of RH with MgCO₃, thus lowering the decomposition temperature during pyrolysis. MgO could not obviously influence the gas evolution during pyrolysis, while MgCO₃ had a better performance on the syngas (H₂ and CO) generation at around 600–700 °C. Also, the generation of CO₂ was suppressed by the RH pyrolysis with MgCO₃. The phenols were the dominant compounds in the bio-oil derived from RH. Furthermore, co-pyrolysis of RH and polyvinyl chloride (PVC) in the presence of MgO or MgCO₃ at 600 °C could improve the oils quality by decreasing the acids content and increasing the hydrocarbons content. Particularly, the resulting oils had high hydrocarbons content (>35%) and low acids content (<2%). The decrease of acids, alcohols, and phenols contributed to the increase of hydrocarbons.
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