MoO3 modified CeO2/TiO2 catalyst prepared by a single step sol–gel method for selective catalytic reduction of NO with NH3

Jiang, Ye; Xing, Zhimin; Wang, Xuechong; Huang, Shanbo; Liu, Qingyu; Yang, Jingshan

doi:10.1016/j.jiec.2015.04.023

Cited by 58 publications

(13 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[25b,55] It is worth noting that Mo doping not only increases acid sites on CeO 2 /TiO 2 but also the specific surface area and redox ability of the catalyst, all of which contribute to the remarkable performance. [56] For CeÀ Ti mixed oxide catalyst prepared by sol-gel, [57] homogeneous precipitation [58] and co-precipitation methods, [59] the addition of Mo can remarkably improve the resistance to SO 2 + H 2 O and effectively increase the activity via increasing the amounts of surface Ce 3 + ions and oxygen species. Zhang et al synthesized mesoporous CeÀ TiÀ Mo mixed oxide catalyst using Reaction condition: 500 ppm NO, 500 ppm NH 3 , 5 vol.…”

Section: Molybdenum (Mo) Modificationmentioning

confidence: 99%

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

et al. 2020

View full text Add to dashboard Cite

Selective catalytic reduction of NOx with NH3 (NH3−SCR) is one of the widely used process to abate NOx emission from both stationary and mobile sources. Recently, CeO2−TiO2 based NH3−SCR catalysts due to their excellent medium and high temperature activities, high N2 selectivity and environmentally friendly, have attracted much attention as great candidate to replace the commercial VOx−TiO2 based NH3−SCR catalysts. During the past years, extensive works have been done to achieve the industrial commercialization of CeO2−TiO2 based NH3−SCR catalyst. In this review, we summarize the recent studies on the mechanism, deactivation, preparation and modification of CeO2−TiO2 catalyst. The focus of this review is the modification strategies on improving the catalytic performance of CeO2−TiO2 catalyst. By comparing the effect of different modification strategies on the catalytic performance of CeO2−TiO2 catalyst, the perspectives and challenges of CeO2−TiO2 based catalyst for NH3−SCR of NOx are discussed.

show abstract

Section: Molybdenum (Mo) Modificationmentioning

confidence: 99%

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Cerium-based catalysts are regarded as promising substitutes for commercial vanadium-based catalysts owing to the excellent oxygen storage capacity and redox property of CeO 2 (Li et al, 2012a;Jiang et al, 2018). A series of cerium-based SCR catalysts have been synthesized and investigated for the SCR of NO with NH 3 , such as Ce-Ti oxides (Xu et al, 2008;Gao et al, 2010b;Li et al, 2012b), Ce-W/TiO 2 (Chen et al, 2010;Shan et al, 2012;Jiang et al, 2015b), Ce-Cu/TiO 2 (Gao et al, 2010a), Ce-Sn-O x (Li et al, 2013) and Ce-Mo/TiO 2 (Liu et al, 2014;Jiang et al, 2015a;Geng et al, 2017). In order to improve the performance of cerium-based catalysts, some researchers tried to treat them with non-metals or add non-metals to them.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Low-temperature NH3-SCR Activity over Ce-Ti Oxide Catalysts by Hydrochloric Acid Treatment

Jiang

Shi

et al. 2019

Aerosol Air Qual. Res.

Self Cite

View full text Add to dashboard Cite

The effect of hydrochloric acid treatment on Ce-Ti oxides was investigated for selective catalytic reduction of NO with NH 3. The results showed that hydrochloric acid treatment had a positive effect on the low-temperature activity of Ce-Ti oxides. The improved activity of Ce-Ti oxides could be attributed to the increase in the concentration of Ce as well as the amount of Ce 3+ and chemisorbed oxygen on the catalyst surface. In addition, the enhanced Lewis acidity could improve NH 3 absorption, and was also a key factor to enhance the low-temperature activity of Ce-Ti oxides.

show abstract

“…Our group prepared a CeO 2 –MoO 3 /TiO 2 catalyst using a single step sol–gel method, which exhibited high SCR activity and resistance to 10% H 2 O and 1000 ppm SO 2 . 11 However, from the point of view of industrial applications, further studies are still required to clarify their adaptability to other components in flue gas from stationary sources, such as alkali (earth) metals, heavy metals, HCl, etc.…”

Section: Introductionmentioning

confidence: 99%

Deactivation by HCl of CeO₂–MoO₃/TiO₂ catalyst for selective catalytic reduction of NO with NH₃

Jiang

Liu

et al. 2018

RSC Adv.

Self Cite

View full text Add to dashboard Cite

The effect of HCl on a CeO 2 -MoO 3 /TiO 2 catalyst for the selective catalytic reduction of NO with NH 3 was investigated with BET, XRD, NH 3 -TPD, H 2 -TPR, XPS and catalytic activity measurements. The results showed that HCl had an inhibiting effect on the activity of the CeO 2 -MoO 3 /TiO 2 catalyst. The deactivation by HCl of the CeO 2 -MoO 3 /TiO 2 catalyst could be attributed to pore blockage, weakened interaction among ceria, molybdenum and titania, reduction in surface acidity and degradation of redox ability. The Ce 3+ /Ce 4+ redox cycle was damaged because unreactive Ce 3+ in the form of CeCl 3 lost the ability to be converted to active Ce 4+ in the SCR reaction. In addition, a decrease in the amount of chemisorbed oxygen and the concentrations of surface Ce and Mo was also responsible for the deactivation by HCl of the CeO 2 -MoO 3 /TiO 2 catalyst.

show abstract

MoO3 modified CeO2/TiO2 catalyst prepared by a single step sol–gel method for selective catalytic reduction of NO with NH3

Cited by 58 publications

References 35 publications

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

Enhanced Low-temperature NH3-SCR Activity over Ce-Ti Oxide Catalysts by Hydrochloric Acid Treatment

Deactivation by HCl of CeO₂–MoO₃/TiO₂ catalyst for selective catalytic reduction of NO with NH₃

Contact Info

Product

Resources

About

MoO3 modified CeO2/TiO2 catalyst prepared by a single step sol–gel method for selective catalytic reduction of NO with NH3

Cited by 58 publications

References 35 publications

Recent Progress of CeO2−TiO2 Based Catalysts for Selective Catalytic Reduction of NOx by NH3

Recent Progress of CeO2−TiO2 Based Catalysts for Selective Catalytic Reduction of NOx by NH3

Enhanced Low-temperature NH3-SCR Activity over Ce-Ti Oxide Catalysts by Hydrochloric Acid Treatment

Deactivation by HCl of CeO2–MoO3/TiO2 catalyst for selective catalytic reduction of NO with NH3

Contact Info

Product

Resources

About

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

Recent Progress of CeO₂−TiO₂ Based Catalysts for Selective Catalytic Reduction of NO_x by NH₃

Deactivation by HCl of CeO₂–MoO₃/TiO₂ catalyst for selective catalytic reduction of NO with NH₃