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Promotion of transition metal oxides on the NH3-SCR performance of ZrO2-CeO2 catalyst
Li, Weiman1,2,3; Liu, Haidi1,3; Chen, Yunfa1,3

Chromium oxide and manganese oxide promoted ZrO2-CeO2 catalysts were prepared by a homogeneous precipitation method for the selective catalytic reduction of NOx with NH3. A series of characterization including X-ray diffraction (XRD), high-resolution transmission electron microscope (HR-TEM), Brunauer-Emmett-Teller (BET) surface area analysis, H-2 temperature-programmed reduction (H-2-TPR), and X-ray photoelectron spectroscopy (XPS) were used to evaluate the influence of the physicochemical properties on NH3-SCR activity. Cr-Zr-Ce and Mn-Zr-Ce catalysts are much more active than ZrO2-CeO2 binary oxide for the low temperature NH3-SCR, mainly because of the high specific surface area, more surface oxygen species, improved reducibility derived from synergistic effect among different elements. Mn-Zr-Ce catalyst exhibited high tolerance to SO2 and H2O. Cr-Zr-Ce mixed oxide exhibited> 80% NOx conversion at a wide temperature window of 100 degrees C-300 degrees C. In situ DRIFT studies showed that the addition of Cr is beneficial to the formation of Bronsted acid sites and prevents the formation of stable nitrate species because of the presence of Cr6+. The present mixed oxide can be a candidate for the low temperature abatement of NOx. (C) Higher Education Press and Springer-Verlag Berlin Heidelberg 2017

KeywordNh3-selective Catalytic Reduction Nox Low Temperature Cr-zr-ce
WOS HeadingsScience & Technology ; Technology ; Life Sciences & Biomedicine
Indexed BySCI
WOS KeywordLow-temperature ; Superior Catalyst ; Scr Catalysts ; Active-sites ; Nitric-oxide ; Reduction ; Nh3 ; Nox ; Ammonia ; Oxidation
WOS Research AreaEngineering ; Environmental Sciences & Ecology
WOS SubjectEngineering, Environmental ; Environmental Sciences
Funding OrganizationNational Key Research and Development Plan(2016YFC0204103)
WOS IDWOS:000400071800006
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Urban Atmospher Environm, Xiamen 361021, Peoples R China
Recommended Citation
GB/T 7714
Li, Weiman,Liu, Haidi,Chen, Yunfa. Promotion of transition metal oxides on the NH3-SCR performance of ZrO2-CeO2 catalyst[J]. FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,2017,11(2).
APA Li, Weiman,Liu, Haidi,&Chen, Yunfa.(2017).Promotion of transition metal oxides on the NH3-SCR performance of ZrO2-CeO2 catalyst.FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING,11(2).
MLA Li, Weiman,et al."Promotion of transition metal oxides on the NH3-SCR performance of ZrO2-CeO2 catalyst".FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING 11.2(2017).
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