Simultaneous Control of NOx-Soot by Substitutions of Ag and K on Perovskite (LaMnO3) Catalyst

Ganesh Chandra Dhal; Subhashish Dey; Devendra Mohan; Ram Prasad

doi:10.9767/bcrec.13.1.1152.144-154

DOI: https://doi.org/10.9767/bcrec.13.1.1152.144-154

Simultaneous Control of NOx-Soot by Substitutions of Ag and K on Perovskite (LaMnO3) Catalyst

Ganesh Chandra Dhal¹ , Subhashish Dey¹, Devendra Mohan¹, Ram Prasad²

¹Department of Civil Engineering, IIT (BHU) Varanasi, Uttar Pradesh, India

²Department of Chemical Engineering and Technology, IIT (BHU) Varanasi, Uttar Pradesh, India

Received: 13 Apr 2017; Revised: 8 Sep 2017; Accepted: 8 Sep 2017; Available online: 22 Jan 2018; Published: 2 Apr 2018.

Editor(s): Istadi Istadi

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

BibTex Citation Data :

@article{BCREC1152,
    author = {Ganesh Dhal and Subhashish Dey and Devendra Mohan and Ram Prasad},
    title = {Simultaneous Control of NOx-Soot by Substitutions of Ag and K on Perovskite (LaMnO3) Catalyst},
    journal = {Bulletin of Chemical Reaction Engineering & Catalysis},
  volume = {13},
    number = {1},
    year = {2018},
    keywords = {Perovskite catalysts; Simultaneous removal of NOX and diesel soot; solid state method.},
    abstract = { The different Ag and K substituted perovskite catalysts including base catalyst were LaMnO 3  by the solid state method and the diesel soot was prepared in the laboratory. Their structures and physico-chemical properties were characterized by X-ray diffraction (XRD), BET, SEM, H 2 -TPR, and XPS techniques. The Ag Substituted at A-site perovskite structured catalysts are more active than other type of catalysts for the simultaneous soot-NO X  reaction, When Ag and K are simultaneously introduced into LaMnO 3  catalyst, soot combustion is largely accelerated, with the temperature (T m ) for maximal soot conversion lowered by at least 50 °C, moreover, NO X  reduction by soot is also facilitated. The high activity of La 0.65 Ag 0.35 MnO 3  perovskite catalyst is attributed to presence of metallic silver in the catalyst. The activity order of Ag doped LaMnO 3  is as follows La 0.65 Ag 0.35 MnO 3  > La 0.65 Ag 0.2 MnO 3  > La 0.65 Ag 0.4 MnO 3  > La 0.65 Ag 0.1 MnO 3 . The dual substitution of silver and potassium in place of La in LaMnO 3  gives better activity than only silver doped catalyst. In a series of La 0.65 Ag x K 1-x MnO 3 , the optimum substitution amount of K is for x=0.25. The single and doubled substituted perovskite catalyst proved to be effective in the simultaneous removal of NO X  and soot particulate, the two prevalent pollutants in diesel exhaust gases in the temperature range 350-480 °C.  },
   issn = {1978-2993},   pages = {144--154}  doi = {10.9767/bcrec.13.1.1152.144-154},
    url = {https://ejournal2.undip.ac.id/index.php/bcrec/article/view/1152}
}

Citation Format:

Abstract

The different Ag and K substituted perovskite catalysts including base catalyst were LaMnO₃ by the solid state method and the diesel soot was prepared in the laboratory. Their structures and physico-chemical properties were characterized by X-ray diffraction (XRD), BET, SEM, H₂-TPR, and XPS techniques. The Ag Substituted at A-site perovskite structured catalysts are more active than other type of catalysts for the simultaneous soot-NO_X reaction, When Ag and K are simultaneously introduced into LaMnO₃ catalyst, soot combustion is largely accelerated, with the temperature (T_m) for maximal soot conversion lowered by at least 50 °C, moreover, NO_X reduction by soot is also facilitated. The high activity of La_0.65Ag_0.35MnO₃ perovskite catalyst is attributed to presence of metallic silver in the catalyst. The activity order of Ag doped LaMnO₃ is as follows La_0.65Ag_0.35MnO₃ > La_0.65Ag_0.2MnO₃ > La_0.65Ag_0.4MnO₃ > La_0.65Ag_0.1MnO₃. The dual substitution of silver and potassium in place of La in LaMnO₃ gives better activity than only silver doped catalyst. In a series of La_0.65Ag_xK_1-xMnO₃, the optimum substitution amount of K is for x=0.25. The single and doubled substituted perovskite catalyst proved to be effective in the simultaneous removal of NO_X and soot particulate, the two prevalent pollutants in diesel exhaust gases in the temperature range 350-480 °C.

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Keywords: Perovskite catalysts; Simultaneous removal of NOX and diesel soot; solid state method.

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Section: Original Research Articles

Language : EN

In 2018: BCREC Volume 13 Issue 1 Year 2018 (April 2018)

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