An Investigation of Catalytic Activity for CO Oxidation of CuO/Ce x Zr1–x O2 Catalysts

Wang, Shuping; Zhang, Tong-Ying; Su, Yan Kuin; Wang, Shurong; Zhang, Shoumin; Zhu, Baolin; Wu, Shaohua

doi:10.1007/s10562-007-9294-3

Cited by 34 publications

(21 citation statements)

References 24 publications

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“…In contrast, a two-step reduction profile is observed for all the Cu-containing samples, with peak temperatures considerably lower than those of pure CuO and ceria-zirconia. This indicates the existence of a synergistic effect between copper and the mixed oxide which promotes improved reducibility [13,30,31,[48][49][50].…”

Section: Page 14 Of 38mentioning

confidence: 95%

“…The Cu-ceria interface interactions confer a synergistic effect, which enhances the redox properties of the catalyst due to the stabilisation of highly reactive copper species [8-13, 21, 23-25]. These types of catalysts have already been studied in other reactions with technological interest, such as CO oxidation, CO preferential oxidation in H 2 -rich streams (CO-PROX) or methanol synthesis from CO and H 2 [8,12,13,[26][27][28][29][30].…”

Section: Page 3 Of 38mentioning

confidence: 99%

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Preparation, characterisation and testing of CuO/Ce0.8Zr0.2O2 catalysts for NO oxidation to NO2 and mild temperature diesel soot combustion

Giménez-Mañogil

Bueno‐López

Garcı́a-Garcı́a

2014

Applied Catalysis B: Environmental

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Please cite this article as: J. Giménez-Mañogil, A. Bueno-López, A. García-García, Preparation, characterisation and testing of CuO/Ce 0.8 Zr 0.2 O 2 catalysts for NO oxidation to NO 2 and mild temperature diesel soot combustion., Applied Catalysis B, Environmental (2014), http://dx.doi.org/10. 1016/j.apcatb.2014.01.018 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractCuO/ceria-zirconia catalysts have been prepared, deeply characterised (N 2 adsorption-desorption isotherms at -196°C, XRD, Raman spectroscopy, XPS, TEM and H 2 -TPR) and tested for NO oxidation to NO 2 in TPR conditions, and for soot combustion at mild temperature (400ºC) in a NOx/O 2 stream. The behaviour has been compared to that of a reference Pt/alumina commercial catalyst. The ceria-zirconia support was prepared by the co-precipitation method, and different amounts of copper (0.5, 1, 2, 4 and 6 wt%) were loaded by incipient wetness impregnation.The results revealed that copper is well-dispersed onto the ceria-zirconia support for the catalysts with low copper loading and CuO particles were only identified by XRD in samples with 4 and 6% of copper. A very low loading of copper increases significantly the activity for the NO oxidation to NO 2 with regard to the ceria-zirconia support and an optimum was found for a 4%CuO/ceria-zirconia composition, showing a very high activity (54% at 348ºC). The soot combustion rate at 400ºC obtained with the 2%CuO/ceria-zirconia catalyst is slightly lower to that of 1%Pt/alumina in terms of mass of catalyst but higher in terms of price of catalyst.

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Section: Page 14 Of 38mentioning

confidence: 95%

Section: Page 3 Of 38mentioning

confidence: 99%

Preparation, characterisation and testing of CuO/Ce0.8Zr0.2O2 catalysts for NO oxidation to NO2 and mild temperature diesel soot combustion

Giménez-Mañogil

Bueno‐López

Garcı́a-Garcı́a

2014

Applied Catalysis B: Environmental

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“…A broad shoulder at higher BE region might be attributed to the oxygen in hydroxyl groups. The results imply that the surface species of Ce, Zr, and O elements over both [13]. Figure 5 shows the TPR results of the Ce 0.5 Zr 0.5 O 2 samples.…”

Section: Resultsmentioning

confidence: 90%

“…CeO 2 exhibited high selectivity of hydrocarbons at 673 K, but it decreased with the increase of temperatures from 673 to 723 K. The major role of cerium oxide in the catalysts is to control the oxygen concentration by storage and release under the reaction environment [18]. However, as a support, ceria will result in significant efficiency decrease of the catalysts under thermally harsh environment [13]. Much attention has been focused on Ce-Zr mixed oxide [19][20][21][22].…”

Section: Resultsmentioning

confidence: 99%

A Mesoporous Ce0.5Zr0.5O2 Solid Solution Catalyst for CO Hydrogenation to iso-C4 Hydrocarbons

2008

Catal Lett

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Mesoporous Ce 0.5 Zr 0.5 O 2 solid solution catalyst was synthesized by a sol-gel process using block copolymer Pluronic P123 as the template. The as-prepared catalyst was characterized by X-ray diffraction, H 2 -Temperature-programed reduction, BET, and X-ray photoelectron spectra techniques. The catalytic properties of the catalyst were evaluated by the synthesis of iso-C 4 hydrocarbons via CO hydrogenation. The mesoporous catalyst showed much better catalytic selectivity and yield of isobutene and isobutane (i-C 4 ) from CO hydrogenation at 673-723 K, 5.0 MPa, and 720 h -1 , than the solid Ce 0.5 Zr 0.5 O 2 catalyst prepared by coprecipitation. This was due to the higher BET surface area, pore volume and the reducibility of the mesoporous Ce 0.5 Zr 0.5 O 2 catalyst.

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“…Sci. Technol., 8 (4): 149-161, 2015 the different oxidation and reduction properties, more production of free radicals and affinity of the pollutants to adsorption on the catalyst bed (Wang et al, 2008). Thereupon, the Cu 2 O can act as a good electron transmitter that could increase free radical formation (Pham and Lee, 2014) which could react with the intermediates to more completely degradation; although, Cu 2 O was itself a weaker catalyst for BTXs degradation and has led to lower decomposition rate in C-CZ.…”

Section: Mineralization Of the Btxsmentioning

confidence: 99%

BTXs Removal with Transition Metals Coated Beds, Considering the Plausible Reaction Mechanisms

Rostami¹,

Jafari²

2015

J. of Environmental Science and Technology

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In this study, a natural zeolite (i.e., Clinoptilolite) was used as bed of a lab scale packed tower. The bed was coated with two transition metals nano-scale particles (i.e., Fe 0 and Cu 2 O). Each coated metal to bed ratio was 4.6 wt.% and the experiments were conducted in air flow of 1 L minG 1 and temperature of 200°C. The results showed up to 83.83% of BTX (benzene, toluene and xylene) removal for Fe 0 and respectively 32.0 and 56.98% for Cu 2 O and combined Fe 0 -Cu 2 O coated beds. However, the pollutants mineralization/elimination ratio on the combined metals coated bed, with up to 0.83, was greater than the remains which were 0.58 and 0.37 in order for Fe 0 and Cu 2 O coated beds.

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An Investigation of Catalytic Activity for CO Oxidation of CuO/Ce x Zr1–x O2 Catalysts

Cited by 34 publications

References 24 publications

Preparation, characterisation and testing of CuO/Ce0.8Zr0.2O2 catalysts for NO oxidation to NO2 and mild temperature diesel soot combustion

Preparation, characterisation and testing of CuO/Ce0.8Zr0.2O2 catalysts for NO oxidation to NO2 and mild temperature diesel soot combustion

A Mesoporous Ce0.5Zr0.5O2 Solid Solution Catalyst for CO Hydrogenation to iso-C4 Hydrocarbons

BTXs Removal with Transition Metals Coated Beds, Considering the Plausible Reaction Mechanisms

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