Cu/SiO2 catalysts prepared by hom- and heterogeneous deposition–precipitation methods: Texture, structure, and catalytic performance in the hydrogenolysis of glycerol to 1,2-propanediol

Huang, Zhiwei; Cui, Fang; Xue, Jingjing; Zuo, Jianliang; Chen, Jing; Xia, Chungu

doi:10.1016/j.cattod.2011.08.038

Cited by 109 publications

(75 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Figure 2 shows the H2-TPR profile of the calcined catalysts, and an asymmetrical peak can be observed. Generally, the reduction temperature of copper species changes with particle size, chemical environment, and the metal support interaction of Cu oxide species [40,41]. The intensity of reduction peak was reduced with the increased addition of γ-Al2O3 due to the decrease in Cu content.…”

Section: Nh 3 -Tpd Characterizationmentioning

confidence: 99%

Synthesis of Tetrahydropyran from Tetrahydrofurfuryl Alcohol over Cu–Zno/Al2O3 under a Gaseous-Phase Condition

Zhang

Wang

et al. 2018

Catalysts

View full text Add to dashboard Cite

Tetrahydropyran (THP) represents an O-containing hetero-cyclic compound that can be used as a promising solvent or monomer for polymer synthesis. In this work, Cu-ZnO/Al 2 O 3 catalysts have been prepared by a facile precipitation-extrusion method and used for the synthesis of THP through gaseous-phase hydrogenolysis of tetrahydrofurfuryl alcohol (THFA). The effect of the molar ratio of Cu/Zn/Al, reaction temperature, and hydrogen pressure was investigated. An 89.4% selectivity of THP was achieved at 270 • C and 1.0 MPa H 2 . Meanwhile, the optimum molar ratio of Cu/Zn/Al was determined to be 4:1:10. The Cu-ZnO/Al 2 O 3 catalyst exhibited high catalytic activity and stability for 205 h on-stream. A possible reaction mechanism involving several consecutive reactions was proposed: THFA was firstly rearranged to 2-hydroxytetrahydropyran (2-HTHP), followed by the dehydration of 2-HTHP to 3,4-2H-dihydropyran (DHP) over acid sites; finally, the DHP was hydrogenated to THP. The synergy of acid sites and metal sites of Cu-ZnO/Al 2 O 3 played an important role during the production of THP.

show abstract

Section: Nh 3 -Tpd Characterizationmentioning

confidence: 99%

Synthesis of Tetrahydropyran from Tetrahydrofurfuryl Alcohol over Cu–Zno/Al2O3 under a Gaseous-Phase Condition

Zhang

Wang

et al. 2018

Catalysts

View full text Add to dashboard Cite

show abstract

“…The filtered solid was washed with distilled water and dried in a vacuum oven at 333 K for 12 h. Silica supported Cu was prepared with NaOH (Riedel-de Haën, 99%) as precipitation agent where 20 g (fumed) silica powder (Sigma-Aldrich, 99%) were dispersed in a solution of Cu(NO 3 ) 2 (25 9 10 -2 mol dm -3 , 200 cm 3 , Sigma-Aldrich, 99%). The suspension was stirred (600 rpm) at room temperature for 1 h with the addition of aqueous NaOH (2 M) until pH [ 10 and subsequent heating to 353 K maintained for 4 h to ensure homogeneous Cu(OH) 2 deposition [19]. The solid was separated by filtration, washed with distilled water until pH 7 and dried at 393 K overnight.…”

Section: Experimental Catalyst Preparationmentioning

confidence: 99%

“…The solid was separated by filtration, washed with distilled water until pH 7 and dried at 393 K overnight. The dried sample was calcined (in air) at 10 K min -1 to 723 K for 4 h to generate copper oxide (CuO) [19]. All the samples were sieved (ATM fine test sieves) to mean particle diameter = 75 lm.…”

Section: Experimental Catalyst Preparationmentioning

confidence: 99%

Overcoming the limitations of gold catalysts in hydrogenation: enhanced activity with full hydrogen utilization

Keane

Collado

et al. 2018

Reac Kinet Mech Cat

View full text Add to dashboard Cite

Application of nano-scale supported Au in catalytic hydrogenation delivers high chemoselectivity but low activity using (pressurized) H 2 far in excess of stoichiometric requirements. We have tackled the issues of low reaction rate and inefficient hydrogen utilization through a series of approaches taking Au/CeO 2 (mean Au size = 2.8 nm) as a test catalyst. Increased spillover hydrogen (using physical mixtures of Au/CeO 2 with CeO 2 and SiO 2 ) and the promotional effect of water (via catalytic dissociation on surface oxygen vacancies) resulted in a fourfold increase in the selective rate of furfural hydrogenation to furfuryl alcohol. In contrast, Pd/CeO 2 and Ni/CeO 2 promoted decarbonylation (to furan), hydrogenolysis (to 2-methylfuran) and ring reduction (to tetrahydrofurfuryl alcohol). Coupling (2-butanol ? 2-butanone) dehydrogenation over Cu/SiO 2 (mean Cu size = 7.8 nm) with furfural hydrogenation over Au/CeO 2 further increased rate with full utilization of the hydrogen generated in dehydrogenation. The coupling strategy allows ''hydrogen free'' hydrogenation that circumvents the limitation of Au in standard catalytic hydrogenation. This can open new avenues to exploit the ultra-selectivity of Au for continuous production of high value commodity products.

show abstract

“…The catalyst used as follows: Cu/SiO2, Cu/MgO, Al2O3, HZSM, γ-Al2O3, CuSO4, H3PO4 [19][20][21][22][23][24][25]. However, these processes still require operating conditions at high temperature and pressure thus requiring a high operating cost.…”

Section: Introductionmentioning

confidence: 99%

Non-Catalytic and γ-Al2O3 Catalyst-based Degradation of Glycerol by Sonication Method

Kalla

Sumarno

Mahfud

2015

Bull. Chem. React. Eng. Catal.

View full text Add to dashboard Cite

This research aims to study the effect of the addition of the catalyst γ-Al2O3 on the degradation of glycerol with using sonication method. This degradation reaction performed with the aid of a catalyst γ-Al2O3 or without a catalyst. Reactants were prepared from glycerol-water mixture with a mass ratio of 1:8. Experiment was carried out in a batch reactor at atmospheric pressure, temperature range between 30-70 °C for 10-90 min. The products, which were degraded from glycerol, were analyzed by gas chromatography (GC). The results showed that the ultrasonic wave radiation could degrade glycerol. The glycerol conversion was 2.92%-59.95% without employing catalyst, while the conversion of glycerol increased with adding γ-Al2O3.catalyst. It was found that methanol, allyl alcohol and acrolein were degradation products.

show abstract

Cu/SiO2 catalysts prepared by hom- and heterogeneous deposition–precipitation methods: Texture, structure, and catalytic performance in the hydrogenolysis of glycerol to 1,2-propanediol

Cited by 109 publications

References 46 publications

Synthesis of Tetrahydropyran from Tetrahydrofurfuryl Alcohol over Cu–Zno/Al2O3 under a Gaseous-Phase Condition

Synthesis of Tetrahydropyran from Tetrahydrofurfuryl Alcohol over Cu–Zno/Al2O3 under a Gaseous-Phase Condition

Overcoming the limitations of gold catalysts in hydrogenation: enhanced activity with full hydrogen utilization

Non-Catalytic and γ-Al2O3 Catalyst-based Degradation of Glycerol by Sonication Method

Contact Info

Product

Resources

About