Cooperation between Pt and Ru on RuPt/AC bimetallic catalyst in the hydrogenation of phthalates

Xü, Yao; Wu, Chenguang; Wang, Yan; Zhang, Ying; Sun, Hui; Chen, Haijun; Zhao, Yujun

doi:10.1016/j.cclet.2020.04.016

Cited by 12 publications

(2 citation statements)

References 28 publications

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“…Schematic diagram of the combined HO and APR process for PE. [45,49,50] which is consistent with the transmission electron microscopy (TEM) results. The small nanoparticles can provide more surface atoms, thereby enhancing catalytic activity.…”

Section: Resultssupporting

confidence: 88%

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Tian

Zhu

et al. 2021

ChemSusChem

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The thermal degradation and conversion of waste polyethylene (PE) using a two-step process including hydrothermal oxidation (HO) and aqueous phase reforming (APR) were investigated. The objective of this study was to achieve efficient disposal of waste PE and generate H 2 in a mild and green way. The effects of various HO conditions on both HO and APR processes were studied. A high H 2 O 2 concentration caused overoxidation of PE resulting in more CO 2 . Decreasing the H 2 O 2 concentration weakened the overoxidation. The process using diluted H 2 O 2 exhibited the highest selectivity for acetic acid among the produced carboxylic acids. When the HO temperature exceeded 200°C, there was an increase in the CO 2 yield during the HO process and a decrease in the H 2 yield during the APR process. In addition, the effects of various monometallic and bimetallic catalysts on the reforming of the aqueous phase from the HO of PE were discussed. The highest H 2 mole fraction (51.52 %) in gaseous products from the APR process was obtained with Ru/ mesoporous carbon. Nevertheless, RuÀ Ni exhibited a higher stability than the monometallic Ru catalyst.

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Section: Resultssupporting

confidence: 88%

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Tian

Zhu

et al. 2021

ChemSusChem

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“…The ester group was preserved, and DINCH was finally obtained. This reaction was a tandem reaction involving partial hydrogenation of aromatic ring and the further saturated hydrogenation of intermediate 4H-DINP to DINCH . Meanwhile, a very small number of ester groups of DINP and DINCH were adsorbed on the active sites of catalysts, the activated ester groups reacted with the hydrogen species to obtain 1,2-benzenedicarboxylic acid 1-(7-methyloctyl) ester and 1,2-cyclohexanedicarboxylic acid 1-(7-methyloctyl) ester.…”

Section: Resultsmentioning

confidence: 99%

Ultrauniform Ru Nanoclusters as Efficient Hydrogenation Catalysts for Phthalates

Sun

et al. 2023

Ind. Eng. Chem. Res.

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Cyclohexane dicarboxylic acid (CHDA) ester, a kind of environmental-friendly plasticizer, can be produced by phthalates hydrogenation. However, the synthesis of catalysts with high activity and selectivity is a challenge due to the stability of aromatic rings. In this work, a series of ultrauniform Ru nanoclusters supported by γ-Al2O3 are synthesized for the hydrogenation of diisononyl phthalate (DINP). Results show that the conversion of DINP and the selectivity of diisononyl-cyclohexane-1,2-dicarboxylate (DINCH) both reach 100% at 140 °C and 3 MPa H2 pressure. Diisononyl-cyclohexene-1,2-dicarboxylate (4H-DINP) and 1,2-cyclohexanedicarboxylate-7-methyloctyl ester are found; the hydrogenation reaction network of DINP is constructed. Alkali metal ions adsorbed on the surface of Ru nanoclusters prepared by the polyol method can stabilize Ru3+-Hδ− species by electrostatic interaction, thus affecting the hydrogenation activity of the catalyst, following the order of Li+ > Na+ > K+ > Cs+. Ru-based catalysts prepared by the polyol method have good prospects for application in phthalates hydrogenation.

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Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

Su,

Xu,

et al. 2023

ChemSusChem

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Plastic waste is a promising and abundant resource for H2 production. However, upcycling plastic waste into H2 fuel via conventional thermochemical routes requires relatively considerable energy input and severe reaction conditions, particularly for polyolefin waste. Here, we report a tandem strategy for the selective upcycling of polypropylene (PP) waste into H2 fuel in a mild and clean manner. PP waste was first oxidized into small‐molecule organic acids using pure O2 as oxidant at 190 °C, followed by the catalytic reforming of oxidation aqueous products over ZnO–modified Ru/NiAl2O4 catalysts to produce H2 at 300 °C. A high H2 yield of 44.5 mol/kgPP and a H2 mole fraction of 60.5% were obtained from this tandem process. The entire process operated with almost no solid residue remaining and equipment contamination, ensuring relative stability and clean of the reaction system. This strategy provides a new route for low‐temperature transforming PP and improving the sustainability of plastic waste disposal processes.

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Cooperation between Pt and Ru on RuPt/AC bimetallic catalyst in the hydrogenation of phthalates

Cited by 12 publications

References 28 publications

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Ultrauniform Ru Nanoclusters as Efficient Hydrogenation Catalysts for Phthalates

Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process

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Cooperation between Pt and Ru on RuPt/AC bimetallic catalyst in the hydrogenation of phthalates

Cited by 12 publications

References 28 publications

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Catalytic Reforming of the Aqueous Phase Derived from Diluted Hydrogen Peroxide Oxidation of Waste Polyethylene for Hydrogen Production

Ultrauniform Ru Nanoclusters as Efficient Hydrogenation Catalysts for Phthalates

Low‐Temperature Upcycling of Polypropylene Waste into H2 Fuel via a Novel Tandem Hydrothermal Process

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Product

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Low‐Temperature Upcycling of Polypropylene Waste into H₂ Fuel via a Novel Tandem Hydrothermal Process