A study of glycerol hydrogenolysis over Ru–Cu/Al2O3 and Ru–Cu/ZrO2 catalysts

Soares, André Von‐Held; Salazar, Joyce B.; Falcone, Derek D.; Vasconcellos, Fernanda A.; Davis, Robert J.; Passos, Fábio B.

doi:10.1016/j.molcata.2016.01.027

Cited by 51 publications

(24 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further, ruthenium oxide can be easily reduced at lower temperatures which therefore results in a broad peak between 180 and 350°C. Such a broad single peak has also been reported in literature [27] due to the interactions between Ru and alumina-ZnO doped with ZrO 2 as support. In comparison to Cu and Ru, both Fe and Ni showed dual peaks.…”

Section: Characterization Of Bimetallic Catalystssupporting

confidence: 77%

Bimetallic Fe‐Promoted Catalyst for CO‐Free Hydrogen Production in High‐Temperature‐Methanol Steam Reforming

2019

View full text Add to dashboard Cite

The current work investigates various bimetallic catalysts supported on Al2O3−Zn−ZrO2 to determine a catalyst with minimal CO selectivity at high temperature for methanol steam reforming. Characterization tools employed in this study include temperature programmed reduction, X‐ray diffraction, X‐ray photoelectron spectroscopy and transmission electron microscopy. Activity testing for all the catalysts synthesized were performed in the temperature range of 150 to 500 °C. Bimetallic catalyst with addition of Fe as second metal to Cu in 50 : 50 molar ratio was observed with an interesting synergy which resulted in reduced particle size and enhanced reducibility. It was further observed that Cu−Fe with lower Fe content and up to 75 % Cu led to zero CO selectivity for temperature up to 450 °C. A structure‐activity relationship of Cu−Fe/Al2O3−Zn−ZrO2 was therefore elucidated. Further, reaction mechanism for the same was also proposed based on in‐situ diffuse reflectance infrared Fourier transform spectroscopy.

show abstract

Section: Characterization Of Bimetallic Catalystssupporting

confidence: 77%

Bimetallic Fe‐Promoted Catalyst for CO‐Free Hydrogen Production in High‐Temperature‐Methanol Steam Reforming

2019

View full text Add to dashboard Cite

show abstract

“…Similarly,z irconia-based catalysts are used for the oxidation reaction, as an example ZrO 2 ÀCeO 2 /SiO 2 [18] or gold supported on Zr doped ceria catalysts have been employedf or the oxidation of CO, [19] RuÀCu/ZrO 2 as glycerolh ydrogenolysis catalysts, [20] and CuÀNi/ZrO 2 for the synthesiso fd iethylc arbonate from CO 2 and ethanol. Ap olyoxometalate-zirconia (POM/ZrO 2 ) nanocomposite [21] has been reported for the selective oxidation of alcohols in the liquid phase.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Comparative Catalytic Study of Zirconia-MnCO₃or -Mn₂O₃for the Oxidation of Benzylic Alcohols

et al. 2016

View full text Add to dashboard Cite

We report on the synthesis of the zirconia–manganese carbonate ZrO x (x %)–MnCO3 catalyst (where x=1–7) that, upon calcination at 500 °C, is converted to zirconia–manganese oxide ZrO x (x %)–Mn2O3. We also present a comparative study of the catalytic performance of the both catalysts for the oxidation of benzylic alcohol to corresponding aldehydes by using molecular oxygen as the oxidizing agent. ZrO x (x %)–MnCO3 was prepared through co‐precipitation by varying the amounts of Zr(NO3)4 (w/w %) in Mn(NO3)2. The morphology, composition, and crystallinity of the as‐synthesized product and the catalysts prepared upon calcination were studied by using scanning electron microscopy, transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, and powder X‐ray diffraction. The surface areas of the catalysts [133.58 m2 g−1 for ZrO x (1 %)–MnCO3 and 17.48 m2 g−1 for ZrO x (1 %)–Mn2O3] were determined by using the Brunauer–Emmett–Teller method, and the thermal stability was assessed by using thermal gravimetric analysis. The catalyst with composition ZrO x (1 %)–MnCO3 pre‐calcined at 300 °C exhibited excellent specific activity (48.00 mmolg−1 h−1) with complete conversion within approximately 5 min and catalyst cyclability up to six times without any significant loss in activity. The specific activity, turnover number and turnover frequency achieved is the highest so far (to the best of our knowledge) compared to the previously reported catalysts used for the oxidation of benzyl alcohol. The catalyst showed selectivity for aromatic alcohols over aliphatic alcohols.

show abstract

“…Two types of catalysts are among the most widely used in the reaction of glycerol hydrogenolysis: mixed oxide catalysts with copper and ruthenium catalysts [15–24] . The addition of acid sites to a supported metal catalyst increases both conversion and selectivity in the glycerol hydrogenolysis compared to the result when only the metallic catalyst is used [13,20] . Many authors have described the possible routes for obtaining the products from glycerol hydrogenolysis [13,25,26] .…”

Section: Introductionmentioning

confidence: 99%

Activated Carbon from Renewable Sugarcane Straw: Support for Ru catalyst in glycerol hydrogenolysis to 1,2 Propanodiol, Ethyleneglycol and Propanols

Silveira¹,

Moreira

Grecy³

et al. 2020

ChemistrySelect

View full text Add to dashboard Cite

Sugarcane straw is an important agricultural residue in the ethanol industry. In this work, an activated carbon with high surface area was prepared by activating this straw with H 3 PO 4 (CP) and used as support for Ru catalysts. A commercial activated carbon (CA) was used for comparison. Ru/activated carbons were prepared using RuCl 3 (RuCAC) and Ru(NO)(NO 3) 3 (RuCAN, RuCPN) and characterized by textural analysis, XRF, Boehm titration, pyridine FTIR, TPDÀ He, TPR, H 2-chemisorption, SEM and TEM. The catalysts were tested in the glycerol hydrogenolysis under different conditions of T, P and glycerol concentration. In the standard condition, 200°C, 50 bar and 10 vol % glycerol (GLY), the activity was strongly influenced by the availability of Ru sites on the catalysts surface and acidity following the order RuCPN > RuCAC > RuCAN. Ethylene glycol (EG) formation in RuCAC and RuCPN catalysts was related to metallic sites instead of acidic sites. The formation of 1,2propanediol (1,2PD) instead of 1,3-propanediol was ascribed to predominance of Lewis sites. Reactions with GLY, 1,2PD and EG allowed to propose a reaction scheme comprising the formation of intermediates.

show abstract

A study of glycerol hydrogenolysis over Ru–Cu/Al2O3 and Ru–Cu/ZrO2 catalysts

Cited by 51 publications

References 60 publications

Bimetallic Fe‐Promoted Catalyst for CO‐Free Hydrogen Production in High‐Temperature‐Methanol Steam Reforming

Bimetallic Fe‐Promoted Catalyst for CO‐Free Hydrogen Production in High‐Temperature‐Methanol Steam Reforming

Synthesis and Comparative Catalytic Study of Zirconia-MnCO₃or -Mn₂O₃for the Oxidation of Benzylic Alcohols

Activated Carbon from Renewable Sugarcane Straw: Support for Ru catalyst in glycerol hydrogenolysis to 1,2 Propanodiol, Ethyleneglycol and Propanols

Contact Info

Product

Resources

About

A study of glycerol hydrogenolysis over Ru–Cu/Al2O3 and Ru–Cu/ZrO2 catalysts

Cited by 51 publications

References 60 publications

Bimetallic Fe‐Promoted Catalyst for CO‐Free Hydrogen Production in High‐Temperature‐Methanol Steam Reforming

Bimetallic Fe‐Promoted Catalyst for CO‐Free Hydrogen Production in High‐Temperature‐Methanol Steam Reforming

Synthesis and Comparative Catalytic Study of Zirconia-MnCO3or -Mn2O3for the Oxidation of Benzylic Alcohols

Activated Carbon from Renewable Sugarcane Straw: Support for Ru catalyst in glycerol hydrogenolysis to 1,2 Propanodiol, Ethyleneglycol and Propanols

Contact Info

Product

Resources

About

Synthesis and Comparative Catalytic Study of Zirconia-MnCO₃or -Mn₂O₃for the Oxidation of Benzylic Alcohols