Thermal decomposition of a hydrotalcite-containing Cu–Zn–Al precursor: thermal methods combined with an in situ DRIFT study

Melián‐Cabrera, Ignacio; Granados, M. Lòpez; Fierro, J.L.G.

doi:10.1039/b201996e

Cited by 54 publications

(27 citation statements)

References 22 publications

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“…ZnO shows a very intense peak at 36.2°, which overlaps the peak of CuO. Moreover, lower intensity peaks associated with ZnO are also observed at 32.8°and 44° [42,[60][61][62]. Therefore, the diffractograms only reveal the characteristic peaks of CuO and ZnO.…”

Section: Chemical and Structural Propertiesmentioning

confidence: 86%

Performance of CuO–ZnO–ZrO2 and CuO–ZnO–MnO as metallic functions and SAPO-18 as acid function of the catalyst for the synthesis of DME co-feeding CO2

Ateka

Sierra

Ereña

et al. 2016

Fuel Processing Technology

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Section: Chemical and Structural Propertiesmentioning

confidence: 86%

Performance of CuO–ZnO–ZrO2 and CuO–ZnO–MnO as metallic functions and SAPO-18 as acid function of the catalyst for the synthesis of DME co-feeding CO2

Ateka

Sierra

Ereña

et al. 2016

Fuel Processing Technology

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“…The bands attributed to the M-OH bonds (500-1200cm ) (SI Fig S3). The adsorbed water is present mostly as isolated molecule on the surface and not as OH groups within MO skeleton since the corresponding OH bands (500-1200cm -1 ) are disappeared and the broad bands 3100-3600cm -1 are present (SI Fig S3) [28]. In that matter we neglect the influence of adsorbed CO 2 due to exposure to air on the relevant band regions.…”

Section: Calcination Series Of Binary Precursorsmentioning

confidence: 99%

Cu,Zn-based catalysts for methanol synthesis: On the effect of calcination conditions and the part of residual carbonates

Schumann

Tarasov

Thomas

et al. 2016

Applied Catalysis A: General

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Cu/Zn based catalysts for methanol synthesis derived from zincian malachite and aurichalcite precursor phases were investigated. The decomposition process of the different hydroxy-carbonates to yield the carbonate modified metal oxides (calcined precursor) was studied in detail on the basis of the results of nonisothermal kinetics modeling. It was possible to obtain different amounts of the so-called high temperature carbonate (HT-CO 3 ) in the calcined material after calcination at the same temperature by varying the mass transfer conditions, which resulted in differences in crystallinity, IR spectra and decomposition profile. Large amounts of HT-CO 3 in the calcined material seem to be detrimental, whereas only a small fraction is beneficial and effects phase stability.

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“…The results indicate a multi-course of this process, which consists of the stages of evolution of adsorbed water, dehydroxylation and decomposition of carbonate groups. The study of thermal and spectroscopic methods shows that during the calcination process changes in the relative positions of hydroxyl and carbonate groups in the crystallographic structure occur [13]. The paper by Millar contains a proposal for a mechanism including intermediate products of decomposition of Cu and Zn hydroxycarbonates [14].…”

Section: Introductionmentioning

confidence: 99%

The effect of calcination temperature on properties and activity of Cu/ZnO/Al2O3 catalysts

Kowalik¹,

Próchniak²

2010

Annales UMCS, Chemistry

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The paper presents the results of the investigation on the influence of calcination temperature of Cu-Zn-Al catalyst precursor, on physicochemical properties and catalytic activity for water gas shift reaction. A model precursor of chemical composition corresponding with a typical commercial catalyst and prepared by coprecipitation method was studied. It has been shown that the temperature of calcination step determines the surface properties of the final catalyst, the active phase dispersion, and thus significantly affects the catalytic activity.

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Thermal decomposition of a hydrotalcite-containing Cu–Zn–Al precursor: thermal methods combined with an in situ DRIFT study

Cited by 54 publications

References 22 publications

Performance of CuO–ZnO–ZrO2 and CuO–ZnO–MnO as metallic functions and SAPO-18 as acid function of the catalyst for the synthesis of DME co-feeding CO2

Performance of CuO–ZnO–ZrO2 and CuO–ZnO–MnO as metallic functions and SAPO-18 as acid function of the catalyst for the synthesis of DME co-feeding CO2

Cu,Zn-based catalysts for methanol synthesis: On the effect of calcination conditions and the part of residual carbonates

The effect of calcination temperature on properties and activity of Cu/ZnO/Al2O3 catalysts

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