Ruthenium catalysts supported on high-surface-area zirconia for the catalytic wet oxidation of N,N-dimethyl formamide

Sun, Guanglu; Xu, Aihua; He, Yu; Yang, Min; Du, Hong; Sun, Cheng

doi:10.1016/j.jhazmat.2007.12.023

Cited by 39 publications

(26 citation statements)

References 26 publications

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“…This is likely due to the fact that we used the anatase phase of the catalyst, whereas P25 is a mixture of the anatase and rutile phase. The specific surface areas for the other catalysts on inorganic supports are within the ranges reported in the literature [26,[46][47][48].…”

Section: Catalytic La Hydrogenation Experimentssupporting

confidence: 82%

Support Screening Studies on the Hydrogenation of Levulinic Acid to γ-Valerolactone in Water Using Ru Catalysts

et al. 2016

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γ-Valerolactone (GVL) has been identified as a sustainable platform chemical for the production of carbon-based chemicals. Here we report a screening study on the hydrogenation of levulinic acid (LA) to GVL in water using a wide range of ruthenium supported catalysts in a batch set-up (1 wt. % Ru, 90 • C, 45 bar of H 2 , 2 wt. % catalyst on LA). Eight monometallic catalysts were tested on carbon based(C, carbon nanotubes (CNT)) and inorganic supports (Al 2 O 3 , SiO 2 , TiO 2 , ZrO 2 , Nb 2 O 5 and Beta-12.5). The best result was found for Ru/Beta-12.5 with almost quantitative LA conversion (94%) and 66% of GVL yield after 2 h reaction. The remaining product was 4-hydroxypentanoic acid (4-HPA). Catalytic activity for a bimetallic RuPd/TiO 2 catalyst was by far lower than for the monometallic Ru catalyst (9% conversion after 2 h). The effects of relevant catalyst properties (average Ru nanoparticle size, Brunauer-Emmett-Teller (BET) surface area, micropore area and total acidity) on catalyst activity were assessed.

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Section: Catalytic La Hydrogenation Experimentssupporting

confidence: 82%

Support Screening Studies on the Hydrogenation of Levulinic Acid to γ-Valerolactone in Water Using Ru Catalysts

et al. 2016

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“…It has been reported that low-temperature TPR peak (\140°C) of Ru species was assigned to the reduction of well-dispersed RuO x species, and the peak at somewhat higher temperature (about 200°C) was assigned to the reduction of well- [27] Handbook of X-ray Photoelectron Spectroscopy Fig. 2 HR-TEM images (a, b) and EDX spectra (c) of Ru-Re/ZrO 2 crystallized RuO 2 particles [30][31][32][33][34]. The weak and broad reduction peak at 456°C in the H 2 -TPR of Ru/ZrO 2 might be attributed to the interaction of Ru metal and ZrO 2 support [35].…”

Section: Characterization Of Catalystsmentioning

confidence: 99%

Hydrogenolysis of Glycerol to Propanediols Over Highly Active Ru–Re Bimetallic Catalysts

2009

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Several supported Ru-Re bimetallic catalysts (Ru-Re/SiO 2 , Ru-Re/ZrO 2 , Ru-Re/TiO 2 , Ru-Re/H-b, Ru-Re/H-ZSM5) and Ru monometallic catalysts (Ru/SiO 2 , Ru/ZrO 2 , Ru/TiO 2 , Ru/H-b, Ru/H-ZSM5) were prepared and their catalytic performances were evaluated in the hydrogenolysis of glycerol to propanediols (1,2-propanediol and 1,3-propanediol) with a batch type reactor (autoclave) under the reaction conditions of 160°C, 8.0 MPa and 8 h. Compared with Ru monometallic catalysts, the Ru-Re bimetallic catalysts showed much higher activity in the hydrogenolysis of glycerol, and Re exhibited obvious promoting effect on the performance of the catalysts. The supported Ru monometallic catalysts and Ru-Re bimetallic catalysts were characterized by N 2 adsorption/desorption, XRD, TEM-EDX, H 2 -TPR and CO chemisorption for obtaining some physicochemical properties of the catalysts, such as specific surface areas, crystal phases, morphologies/microstructure, reduction behaviors and dispersion of Ru metal. The results of XRD and CO chemisorption indicate that the addition of Re component could improve the dispersion of Ru species on supports. The measurements of H 2 -TPR revealed that the coexistence of Re and Ru components on supports changed the respective reduction behavior of Re or Ru alone on the supports, indicating the existence of synergistic effect between Ru and Re species on the bimetallic catalysts. The hydrogenolysis of some products (such as 1,2-propanediol, 1,3-propanediol, 1-propanol and 2-propanol) were also examined over Ru and Ru-Re catalysts for evaluating influence of Re-Re on the reaction routes during glycerol hydrogenolysis. The results showed that over Ru-Re catalysts, glycerol was favorable to be converted to 1,2-propanediol, but not favorable to ethylene glycol, while 1,2-propanediol and 1,3-propanediol were favorable to be converted to 1-propanol. The influence of glycerol concentration in its aqueous solution on the catalytic performance was also evaluated over Ru and Ru-Re catalysts.

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“…1). The monoclinic phase was more dominant in catalyst D, prepared by impregnating ZrO 2 followed by reduction [48][49][50]. The textural properties of supports and Ru/ZrO 2 catalysts are given in Table 2.…”

Section: Resultsmentioning

confidence: 99%

Highly Selective Hydrogenation of Levulinic Acid to γ-Valerolactone Over Ru/ZrO2 Catalysts

et al. 2017

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We studied the catalytic hydrogenation of levulinic acid over zirconia supported ruthenium catalysts. Four different Ru/ZrO 2 catalysts were prepared by different pre-treatments and using different zirconium supports (ZrO x (OH) 4−2x and ZrO 2 ). Although the final compositions of the catalysts are the same, the pre-treatments strongly affect catalytic activity. Remarkably, one of the catalysts gave >99% yield of γ-valerolactone under mild conditions. This catalyst was also robust, and could be recycled at least four times without any loss in activity or selectivity. The activity is attributed to the presence of small ruthenium particles together with acidic sites on the catalyst.Graphical Abstract Pre-treatment changes the performance for ruthenium nanoparticles on zirconia supports, giving TONs over 3500 in the hydrogenation of levulinic acid to γ-valerolactone with over 99% yield. Electronic supplementary materialThe online version of this article

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Ruthenium catalysts supported on high-surface-area zirconia for the catalytic wet oxidation of N,N-dimethyl formamide

Cited by 39 publications

References 26 publications

Support Screening Studies on the Hydrogenation of Levulinic Acid to γ-Valerolactone in Water Using Ru Catalysts

Support Screening Studies on the Hydrogenation of Levulinic Acid to γ-Valerolactone in Water Using Ru Catalysts

Hydrogenolysis of Glycerol to Propanediols Over Highly Active Ru–Re Bimetallic Catalysts

Highly Selective Hydrogenation of Levulinic Acid to γ-Valerolactone Over Ru/ZrO2 Catalysts

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