Al2O3-coated cordierite honeycomb supported CuO catalyst for selective catalytic reduction of NO by NH3: Surface properties and reaction mechanism

Liu, Qingya; Liu, Zhenyu; Su, Junhua

doi:10.1016/j.cattod.2010.04.036

Cited by 20 publications

(8 citation statements)

References 25 publications

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“…The specific surface areas of the monolithic catalyst after loading Cu-SAPO-34 increase greatly to 30 m 2 /g. This increase in specific surface area is essential for the catalytic reaction and it provides more sites for chemical adsorption and catalytic reactions so that it is good for the reactions [14].…”

Section: Xrd and Sem Resultsmentioning

confidence: 99%

See 1 more Smart Citation

In situ Synthesis of Cu-SAPO-34/Cordierite for the Catalytic Removal of NOx from Diesel Vehicles by C3H8

Liu

Tang

Chang

et al. 2011

Chinese Journal of Catalysis

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Section: Xrd and Sem Resultsmentioning

confidence: 99%

“…面积仅为 1 m 2 /g, 而负载 Cu-SAPO-34 后, 整体催化剂的比表面积显著增至 30 m 2 /g. 催化剂比表面积的增加为化学吸附和催化反应提供了更多的位点, 从而有利于反应的进行 [14] .…”

Section: 蜂窝状堇青石拥有不规整的多孔结构其比表unclassified

In situ Synthesis of Cu-SAPO-34/Cordierite for the Catalytic Removal of NOx from Diesel Vehicles by C3H8

Liu

Tang

Chang

et al. 2011

Chinese Journal of Catalysis

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“…Firstly, the coating method is to make the powder catalyst (including carrier and active component) into a uniform solution with solvent, thereby coating on the base structure (honeycomb ceramics, fibrous materials and wire mesh, etc.) [31][32][33] The catalysts show excellent deNO x performance due to the uniform distribution of active components on the surface of the base structure. However, the honeycomb coated catalysts exhibit poor abrasion performance, which are easy to cause the loss of surface active components and reduce its lifespan.…”

Section: Forming Process Of Honeycomb Catalystsmentioning

confidence: 99%

Formation and Performance of Monolithic Catalysts for Selective Catalytic Reduction of Nitrogen Oxides: A Critical Review

et al. 2021

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Selective Catalytic Reduction of nitrogen oxides with NH 3 (NH 3 -SCR) is the dominant denitration technology for the treatment of nitrogen oxides produced by thermal power plants. Denitration catalysts are the core of the NH 3 -SCR system, which can be fabricated into shaped forms to obtain necessary mechanical strength for industrial applications. Specifically, the monolithic catalysts are widely used due to its unique structural properties and high conversion rate. Therefore, this review critically summarized the development of the monolithic catalysts forming, and characterized the influence of the different carriers, the various additives and different reaction conditions of forming process for NH 3 -SCR. The purpose of this review is to highlight: (1) the Support effect of the different carriers; (2) the influence of mechanical properties of the various forming additives for the monolithic catalysts; and (3) the physicochemical properties of the monolithic catalysts under the different process conditions and illustrate their relations to catalytic performances. Finally, we hope that this work can give timely technical guidance and valuable insights for the applications of the NH 3 -SCR in the field of NO x control.

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“…Qiu et al [20] reported a series of cordierite supported V 2 O 5 -MoO 3 /TiO 2 catalysts that were synthesized through an impregnation method for NH 3 -SCR. Liu et al [21] prepared a Al 2 O 3 -coated cordierite supported CuO catalyst for NH 3 -SCR and reported that the SCR reaction followed the E-R mechanism over the synthesized catalyst. In most works, the cordierite ceramics used are commercial products [19][20][21][22], which are expensive due to the high fabrication costs and the complex preparation process [23].…”

Section: Introductionmentioning

confidence: 99%

“…Liu et al [21] prepared a Al 2 O 3 -coated cordierite supported CuO catalyst for NH 3 -SCR and reported that the SCR reaction followed the E-R mechanism over the synthesized catalyst. In most works, the cordierite ceramics used are commercial products [19][20][21][22], which are expensive due to the high fabrication costs and the complex preparation process [23]. In our previous work, porous cordierite ceramics have been successfully synthesized from fly ash and natural minerals.…”

Section: Introductionmentioning

confidence: 99%

In Situ DRIFTS Investigation on CeOx Catalyst Supported by Fly-Ash-Made Porous Cordierite Ceramics for Low-Temperature NH3-SCR of NOX

Wang

Chen

et al. 2019

Catalysts

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A series of CeOx catalysts supported by commercial porous cordierite ceramics (CPCC) and synthesized porous cordierite ceramics (SPCC) from fly ash were prepared for selective catalytic reduction of NOx with ammonia (NH3-SCR). A greater than 90% NOx conversion rate was achieved by the SPCC supported catalyst at 250–300 °C when the concentration of loading precursor was 0.6 mol/L (denoted as 0.6Ce/SPCC), which is more advantageous than the CPCC supported ones. The EDS mapping results reveal the existence of evenly distributed impurities on the surface of SPCC, which hence might be able to provide more attachment sites for CeOx particles. Further measurements with temperature programmed reduction by hydrogen (H2-TPR) demonstrate more reducible species on the surface of 0.6Ce/SPCC, thus giving rise to better NH3-SCR performance at a low-temperature range. The X-ray photoelectron spectroscopy (XPS) analyses reveal that the Ce atom ratio is higher in 0.6Ce/SPCC, indicating that a higher concentration of catalytic active sites could be found on the surface of 0.6Ce/SPCC. The in situ diffused reflectance infrared fourier transform spectroscopy (DRIFTS) results indicate that the SCR reactions over 0.6Ce/SPCC follow both Eley-Rideal (E-R) and Langmuir-Hinshelwood (L-H) mechanisms. Hence, the SPCC might be a promising candidate to provide support for NH3-SCR catalysts, which also provide a valuable approach to recycling the fly ash.

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Al2O3-coated cordierite honeycomb supported CuO catalyst for selective catalytic reduction of NO by NH3: Surface properties and reaction mechanism

Cited by 20 publications

References 25 publications

In situ Synthesis of Cu-SAPO-34/Cordierite for the Catalytic Removal of NOx from Diesel Vehicles by C3H8

In situ Synthesis of Cu-SAPO-34/Cordierite for the Catalytic Removal of NOx from Diesel Vehicles by C3H8

Formation and Performance of Monolithic Catalysts for Selective Catalytic Reduction of Nitrogen Oxides: A Critical Review

In Situ DRIFTS Investigation on CeOx Catalyst Supported by Fly-Ash-Made Porous Cordierite Ceramics for Low-Temperature NH3-SCR of NOX

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