Kinetics of CO Oxidation over Pt-Modified CuO Nanocatalysts

Lộc, Lưu Cẩm; Tri, Nguyen; Cuong, Hoang Tien; Ha, Ahmed

doi:10.2320/matertrans.ma201545

Cited by 7 publications

(2 citation statements)

References 13 publications

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“…As follows from previous investigation, the CO oxidation over the CuO/Al 2 O 3 , CuCr/Al 2 O 3 [6] and Pt/Al 2 O 3 [11] catalysts at low temperature was inhibited by steam. This may be due to the hydrophilic property of alumina.…”

Section: Introductionmentioning

confidence: 98%

“…In our previous studies [6][7][8][9] the optimal compositions of metal oxide catalysts for complete oxidation of CO and p-xylene have been determined as follows: 10 wt.% CuO/ γ-Al 2 O 3 , 7.5 wt.% CuO/CeO 2 , 12.5 w.% CuO/TiO 2 (P25Degusa), and 10 wt.% CuO/20 wt.% CeO 2 + γ-Al 2 O 3 (Cu/CeAl). These samples have been found to be the most active and stable for the complete oxidation of CO, p-xylene and their mixture.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The role of carriers in properties and performance of Pt-CuO nanocatalysts in low temperature oxidation of CO andp-xylene

Lộc¹,

Tri²,

Hoang³

et al. 2014

Adv. Nat. Sci: Nanosci. Nanotechnol.

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Enhancement of water-gas shift reaction efficiency: catalysts and the catalyst bed arrangement Natal'ya A Baronskaya, Tat'yana P Minyukova, Aleksandr A Khassin et al. In this study four optimal catalysts on the basis of Pt-CuO supported on γ-Al 2 O 3 , TiO 2 , CeO 2 and γ-Al 2 O 3 + CeO 2 have been prepared and studied. Characterizations of the catalysts have been carried out by methods of N 2 adsorption, x-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and temperatureprogrammed-reduction (TPR). The activity of these catalysts for deep oxidation of CO, p-xylene and their mixture was assessed at temperature range 75−300°C. The results showed that the presence of CO in a mixture with p-xylene has a beneficial effect on the rate of p-xylene conversion; meanwhile the presence of p-xylene shows the inhibition on CO oxidation. In the reactions of the mixture, oxidation of CO and p-xylene occurred simultaneously on PtCuO catalyst supported on γ-Al 2 O 3 , TiO 2 , CeO 2 carriers, but on catalyst PtCu/CeAl the oxidation of p-xylene can proceed only when CO is consumed entirely. Addition of 1.1 to 3.2% mol steam into the gas mixture exhibits no effect on the conversion of CO; meanwhile, it shows the limited effect on oxidation rate of p-xylene on hydrophobic catalysts (PtCu/Ce, PtCu/CeAl and PtCu/ Ti), but strong inhibition on hydrophilic catalyst (PtCu/Al). However, this negative effect of water was reversible.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%