Conversion of waste mask into hydrocarbon-rich fuels through catalytic pyrolysis with Zr-Mg bimetallic catalyst under N2/CO2 atmosphere.

In this work, the Zr-Mg bimetallic catalyst is prepared and used to facilitate the conversion of the waste mask to hydrocarbon-rich fuels. The effects of the catalyst and the reaction atmosphere on pyrolysis behaviors of different layers of the mask are discussed, and the interactions between CO 2 and the catalyst are analyzed. The results showed that the synthesized catalyst significantly promoted the conversion of long-chain hydrocarbons to short-chain hydrocarbons. Compared with pyrolysis alone under N 2 atmosphere, the relative contents of hydrocarbon compounds obtained by catalytic pyrolysis in the inner layer and middle layer increased by 12.21% and 16.24%, respectively. Additionally, the relative content of olefins in the liquid product increased by 9.62%. When the pyrolysis atmosphere was changed from N 2 to CO 2 , the selectivity of the cycloalkanes was significantly enhanced. Also, the interactions between CO 2 and the catalyst improved the selectivity of C 2 H 6. These works provide important support for the effective disposal of masks and an in-depth understanding of the CO 2 -assisted pyrolysis process. • A catalyst that promotes the generation of hydrocarbon-rich fuels is synthesized. • The selectivity of short-chained liquid hydrocarbons is increased by 13.87%. • The CO 2 promotes the generation of C 3 H 6 in gaseous hydrocarbon products. • Effects of CO 2 and catalyst converting mask into hydrocarbon-rich fuels are given. [ABSTRACT FROM AUTHOR]