Modification of the performance of WO3-ZrO2 catalysts by metal addition in hydrocarbon reactions

Torres, Gerardo; Manuale, Débora Laura; Benítez, Viviana M.; Vera, Carlos Román; Yori, Juan Carlos

doi:10.1590/s0100-40422012000400018

Cited by 5 publications

(2 citation statements)

References 25 publications

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“…In regards to the Ni/WZr catalyst, only two peaks can be detected; the first is found at low (350-500 • C) and the second at higher (500-700 • C) temperatures. It can be also seen that, the low temperature peak can be deconvoluted in two peaks (423 and 460 • C) and the high temperature peak into three peaks (528, 600, and 648 • C), confirming the existence of nickel species having different strength of interaction with the support (Torres et al, 2012). An additional observation is the absence of peaks at high temperatures (T>700 • C), indicating the absence of possible NiO-ZrO 2 solid solutions.…”

Section: Temperature Programmed Reduction (H 2 -Tpr)mentioning

confidence: 64%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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The time-on-stream catalytic performance and stability of 8 wt. % Ni catalyst supported on two commercially available catalytic supports, ZrO 2 and 15 wt.% WO 3 -ZrO 2 , was investigated under the biogas dry reforming reaction for syngas production, at 750 • C and a biogas quality equal to CH 4 /CO 2 = 1.5, that represents a common concentration of real biogas. A number of analytical techniques such as N 2 adsorption/desorption (BET method), XRD, H 2 -TPR, NH 3 -and CO 2 -TPD, SEM, ICP, thermal analysis (TGA/DTG) and Raman spectroscopy were used in order to determine textural, structural and other physicochemical properties of the catalytic materials, and the type of carbon deposited on the catalytic surface of spent samples. These techniques were used in an attempt to understand better the effects of WO 3 -induced modifications on the catalyst morphology, physicochemical properties and catalytic performance. Although Ni dispersion and reducibility characteristics were found superior on the modified Ni/WZr sample than that on Ni/Zr, its dry reforming of methane (DRM) performance was inferior; a result attributed to the enhanced acidity and complete loss of the basicity recorded on this catalyst, an effect that competes and finally overshadows the benefits of the other superior properties. Raman studies revealed that the degree of graphitization decreases with the insertion of WO 3 in the crystalline structure of the ZrO 2 support, as the I D /I G peak intensity ratio is 1.03 for the Ni/Zr and 1.29 for the Ni/WZr catalyst.

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Section: Temperature Programmed Reduction (H 2 -Tpr)mentioning

confidence: 64%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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“…Torres et.al. [19], studied modification of WO 3 -ZrO 2 catalyst by metal addition, maximum conversion achieved was about 70%. Ma et.al.…”

Section: Ni/wo 3 Sz Activity For Isomerization Of N-hexane Model Fuelmentioning

confidence: 97%

Synthesis and Characterization of Ni-WO3/Sulfated Zirconia Nano catalyst for Isomerization of N-Hexane and Iraqi Light Naphtha

Kamel

Mohammed

Al-Jendeel³

2021

IJCPE

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This work deals with preparation of Sulfated Zirconia catalyst (SZ) for isomerization of n-hexane model and refinery light naphtha, as well as enhanced the role of promoters to get the target with the mild condition, stability, and to prevent formation of coke precursors on strong acidic sites of the catalyst. The prepared SZ catalysts were characterization by fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), Brunauer –Emmett-Teller (BET) surface area analysis, Thermogravimetric Analysis (TGA), Scanning Electron Microscope (SEM) and atomic force microscopy (AFM) Analyzer. The results illustrate that the maximum conversion and selectivity for n-hexane isomerization with Ni-WSZ and operating temperature of 150 °C was 80.1% and 96 % respectively .Other set of experimental with light naphtha , the results show that the maximum conversion and selectivity with Ni-WSZ and operating temperature of 150 °C was 73.6% and 74% respectively.

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Production of valuable chemicals through the catalytic pyrolysis of harmful oil sludge over metal-loaded HZSM-5 catalysts

Hakimian

Valizadeh

Kim

et al. 2022

Environmental Research

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Modification of the performance of WO3-ZrO2 catalysts by metal addition in hydrocarbon reactions

Cited by 5 publications

References 25 publications

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Synthesis and Characterization of Ni-WO3/Sulfated Zirconia Nano catalyst for Isomerization of N-Hexane and Iraqi Light Naphtha

Production of valuable chemicals through the catalytic pyrolysis of harmful oil sludge over metal-loaded HZSM-5 catalysts

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