Catalyst performance and mechanism of catalytic combustion of dichloromethane (CH2Cl2) over Ce doped TiO2

Cao, Shuang; Wang, Haiqiang; Yu, Feixiang; Shi, Mengpa; Chen, Shuang; Weng, Xiaole; Liu, Yue; Wu, Zhongbiao

doi:10.1016/j.jcis.2015.10.061

Cited by 99 publications

(47 citation statements)

References 59 publications

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“…[47] studied the deactivation of TiO 2 -based catalysts and they found out that the Cl-induced deactivation is reduced at higher temperatures, but it cannot be completely avoided even after CeO 2 doping. [47] In our case, the improved activity of PtTi compared with TiO 2 may be due to the Cl adsorption or accumulation on the surface of TiO 2 , which is decreased after Pt impregnation. To check out this hypothesis, the XPS analysis was done for TiO 2 and PtTi before and after the DCM oxidation test.…”

Section: Figmentioning

confidence: 58%

Comparative study on the support properties in the total oxidation of dichloromethane over Pt catalysts

Assal

Ojala

Piraúlt-Roy

et al. 2017

Chemical Engineering Journal

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The aim of this work was to study the influence of the support oxide properties on the total oxidation of dichloromethane in moist conditions. The support materials γ-Al 2 O 3 , TiO 2 , CeO 2 and MgO were synthesized by a sol-gel method followed by wet impregnation of Pt and characterized by different physico-chemical techniques. The conversion of DCM was higher than 90% at 500 °C over impregnated and non-impregnated Al 2 O 3 , TiO 2 and CeO 2 , even at high GHSV. CO, CH 3 Cl and CH 2 O were the major by-products observed and their amounts decreased after Pt impregnation. The CH 3 Cl formation was higher when Lewis acid sites were present while the existence of Brønsted sites promoted the CH 2 O formation. The complete conversion of DCM was achieved at around 450 °C over the Al 2 O 3 and Pt/Al 2 O 3 and at 500°C for Pt/TiO 2 . These two catalysts exhibited the highest total acidities among the materials tested. The activity of Pt/Al 2 O 3 remained the same also after 55 h of testing, however, increase in Pt particle size and decrease in acidity were observed. Pt/CeO 2 while being less active showed smallest amount of by-product formation during the whole temperature range used in light-off tests. This is most probably due to its easy reduction ability. The textural parameters of the supports did not appear to be the key parameters when considering the activity and selectivity of the catalysts.

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Section: Figmentioning

confidence: 58%

Comparative study on the support properties in the total oxidation of dichloromethane over Pt catalysts

Assal

Ojala

Piraúlt-Roy

et al. 2017

Chemical Engineering Journal

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“…A-TiO 2 [30], g-C 3 N 4 [31], ZnO [32], BiOI [33] and CeO 2 [30] were prepared by the methods reported in References.…”

Section: Composed Photocatalyst/fe 3 O 4 @Sio 2 (X:1)mentioning

confidence: 99%

A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO

Wang

Dong

et al. 2017

Applied Catalysis B: Environmental

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“…Total oxidation of DCM (1000 ppm in 10%O2) was investigated over CeOx-doped titania by Cao et al [183].…”

Section: Dichloromethane (Dcm)mentioning

confidence: 99%

Transition metal oxides for combustion and depollution processes

Bion¹,

Can²,

Courtois³

et al. 2018

Metal Oxides in Heterogeneous Catalysis

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Transition metal oxides (M = Mn, Co, Fe, Ni,…) are potential catalysts for application in combustion and depollution processes. Owing to huge improvements in their preparation, perovskites, spinels, hexaaaluminates and some other oxide structures can replace noble metals in a number of processes. In this chapter, the most recent advances in the use of oxides for total oxidation (CO, methane, COV, wet air oxidation) and for the treatment of nitrogen compounds (NOx, NH3, urea) will be reviewed. In every case, the most probable mechanism (Langmuir-Hinshelwood, Eley-Rideal, Mars-van Krevelen,…) and the nature of active sites (M n+ /M n+1 ion pairs, acid-base sites,…) as well as the role of reactive oxygen species will be examined in the light of recent results and up-to-date concepts. Finally the outstanding progresses in the oxide synthesis allow to apply these concepts to the development of extremely active and more stable catalysts.

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Catalyst performance and mechanism of catalytic combustion of dichloromethane (CH2Cl2) over Ce doped TiO2

Cited by 99 publications

References 59 publications

Comparative study on the support properties in the total oxidation of dichloromethane over Pt catalysts

Comparative study on the support properties in the total oxidation of dichloromethane over Pt catalysts

A new strategy for utilization of NIR from solar energy—Promotion effect generated from photothermal effect of Fe3O4@SiO2 for photocatalytic oxidation of NO

Transition metal oxides for combustion and depollution processes

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