Hydrocracking of Polyethylene to Gasoline-Range Hydrocarbons over a Ruthenium-Zeolite Bifunctional Catalyst System with Optimal Synergy of Metal and Acid Sites DOI Open Access
Qing Du, Xin Shang, Yangyang Yuan

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(4), P. 335 - 335

Published: March 31, 2025

Chemical recycling of plastic waste, especially polyolefins, into valuable liquid fuels is considerable significance to address the serious issues raised by their threat on environmental and human health. Nevertheless, construction efficient economically viable catalytic systems remains a significant hurdle. Herein, we developed an bifunctional catalyst system comprising γ-Al2O3-supported ruthenium nanoparticles (Ru/γ-Al2O3) β-zeolite for conversion polyolefins gasoline-range hydrocarbons. A yield C5–12 paraffins up 73.4% can be obtained with polyethene as reactant at 250 °C in hydrogen. The Ru sites primarily activate initial cleavage C–H bonds polymer towards formation olefin intermediates, which subsequently go through further cracking isomerization over acid β-zeolite. Employing situ infrared spectroscopy probe–molecule model reactions, our investigation reveals that optimized proportion spatial distribution dual are pivotal tandem process. This optimization synergistically regulates kinetics accelerates intermediate transfer, thereby minimizing production side C1–4 hydrocarbons resulting from over-cracking enhancing fuels. research contributes novel insights design chemical upgrading chemicals, advancing field waste sustainable production.

Language: Английский

Hydrocracking of Polyethylene to Gasoline-Range Hydrocarbons over a Ruthenium-Zeolite Bifunctional Catalyst System with Optimal Synergy of Metal and Acid Sites DOI Open Access
Qing Du, Xin Shang, Yangyang Yuan

et al.

Catalysts, Journal Year: 2025, Volume and Issue: 15(4), P. 335 - 335

Published: March 31, 2025

Chemical recycling of plastic waste, especially polyolefins, into valuable liquid fuels is considerable significance to address the serious issues raised by their threat on environmental and human health. Nevertheless, construction efficient economically viable catalytic systems remains a significant hurdle. Herein, we developed an bifunctional catalyst system comprising γ-Al2O3-supported ruthenium nanoparticles (Ru/γ-Al2O3) β-zeolite for conversion polyolefins gasoline-range hydrocarbons. A yield C5–12 paraffins up 73.4% can be obtained with polyethene as reactant at 250 °C in hydrogen. The Ru sites primarily activate initial cleavage C–H bonds polymer towards formation olefin intermediates, which subsequently go through further cracking isomerization over acid β-zeolite. Employing situ infrared spectroscopy probe–molecule model reactions, our investigation reveals that optimized proportion spatial distribution dual are pivotal tandem process. This optimization synergistically regulates kinetics accelerates intermediate transfer, thereby minimizing production side C1–4 hydrocarbons resulting from over-cracking enhancing fuels. research contributes novel insights design chemical upgrading chemicals, advancing field waste sustainable production.

Language: Английский

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