Production of MAH-rich bio-oil from co-pyrolysis of biomass and plastics using carbonized MOF catalysts under microwave irradiation

Yasen Chen, Xingguo Wu, Hai Chen, Wei Chen, Junhao Hu, Chun Chang, Shusheng Pang and Pan Li

Energy, 2024, vol. 313, issue C

Abstract: This study investigates the effects of various carbonized MOF catalysts on the properties of products derived from microwave-assisted co-pyrolysis of biomass and plastics. The Cr@C catalysts were prepared from MIL-101(Cr) precursors at different microwave carbonization temperatures, while Fe/Cr@C catalysts were synthesized under varying Fe loadings. Characterization of the catalysts was performed using XRD, BET, and FT-IR. The distribution of solid, liquid, and gaseous products, as well as the composition of bio-oil and syngas, were analyzed. The results show that the 5Fe/Cr@C catalyst achieved the highest pyrolysis gas yield (33.05 wt%), while the 15Fe/Cr@C catalyst produced the highest hydrogen yield (24.97 vol%). The Cr@C catalyst promoted hydrocarbon production, with Cr@C-700 achieving a total hydrocarbon content of 51.04 %. The incorporation of Fe enhanced the selectivity of Cr@C catalysts for monocyclic aromatic hydrocarbons(MAHs) in the bio-oil. The aromatic content reached a maximum of 19.88 % with the 15Fe/Cr@C catalyst. Notably, the MAHs content in the 5Fe/Cr@C catalyst accounted for 97.1 % of the total aromatic hydrocarbons. This research provides valuable insights into the potential of carbonized MOF catalysts for producing bio-oil rich in single-ring aromatic hydrocarbons from microwave-assisted co-pyrolysis of biomass and plastics.

Keywords: Catalyst; Microwave-absorbing properties; Oxygenated compounds; Diels-Alder reaction; Reaction mechanism (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:313:y:2024:i:c:s0360544224038271

DOI: 10.1016/j.energy.2024.134049

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