Promoting
Aromatic Hydrocarbon Formation via Catalytic
Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum
Oxide Catalysts
Posted on 2020-06-15 - 20:43
Converting polycarbonate (PC) plastic
waste into value-added chemicals
and/or fuel additives by catalytic pyrolysis is a promising approach
to dispose of solid wastes. In this study, a series of Fe–Ce@Al2O3 metal oxides were prepared by coprecipitation,
impregnation, and a direct mixing method. The synthesized catalysts
were then employed to investigate the catalytic conversion of PC wastes
to produce aromatic hydrocarbons. Experimental results indicated that
Fe–Ce@Al2O3 prepared by coprecipitation
possessed superior catalytic activity because of its high content
of weak acid sites, large pore volume, high surface area, and well
dispersion of Fe and Ce active species, leading to an ∼3-fold
increase in targeted monocyclic aromatic hydrocarbons compared to
that achieved noncatalytically. Moreover, an increase in the catalyst
to feedstock (C/F) mass ratio was beneficial to the production of
aromatic hydrocarbons at the expense of phenolic products, and elevating
the C/F ratio from 1:1 to 3:1 considerably increased the benzene formation
as the enhancement factor was increased from 2.3 to 8.8.
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Wang, Jia; Jiang, Jianchun; Meng, Xianzhi; Li, Mi; Wang, Xiaobo; Pang, Shusheng; et al. (2020). Promoting
Aromatic Hydrocarbon Formation via Catalytic
Pyrolysis of Polycarbonate Wastes over Fe- and Ce-Loaded Aluminum
Oxide Catalysts. ACS Publications. Collection. https://doi.org/10.1021/acs.est.0c00899