High-Performance Mn-Al-O Catalyst on Reticulated Foam Materials for Environmentally Friendly Catalytic Combustion

Authors

  • S. A. Yashnik Boreskov Institute of Catalysis SB RAS, pr. Akad. Lavrenteva, 5, Novosibirsk, Russia
  • V. V. Ushakov Boreskov Institute of Catalysis SB RAS, pr. Akad. Lavrenteva, 5, Novosibirsk, Russia
  • N. L. Leonov Institute of powder metallurgy NASB, Platonov Srt. 41, Minsk, Belarus
  • Z. R. Ismagilov Institute of Coal Chemistry and Materials Science SB RAS, pr. Sovetskiy 18, Kemerovo, Russia

DOI:

https://doi.org/10.18321/ectj205

Abstract

MnOx supported on alumina and La2O3-modified alumina have been prepared and characterized as methane combustion catalysts. X-ray diffraction (XRD) analysis has revealed the significant low-temperature interaction between MnOx and alumina, resulting in a solid solution Mn-La-γ*-Al2O3 and a hexaaluminate formation upon thermal treatment at 900-1000 ºC and 1300 ºC, respectively. Mn-Al-O and Mn-La-Al-O catalysts washcoated on highly porous reticulated foam materials (RFM) have been prepared by two methods, such as: 1) a wet impregnation of a washcoating alumina layer on RFM by Mn and La nitrate solutions, 2) a dip coating of RFM into Mn-La-Al-containing suspension. The chemical compositions of RFM were cordierite, Ni, and NiCr-alloy. The catalytic activity of washcoated RFM in the methane combustion has been compared with one of granulated catalysts. The influence of alumina form (γ-Al2O3, (γ+χ)-Al2O3, α-Al2O3), manganese loading (5 and 10 wt.%), modifying agent (La2O3) on catalytic activity have been studied. Catalytic performances of Mn-Al-O and Mn-La-Al-O catalysts washcoated on RFM and pretreated in methane-containing atmosphere at 1100 ºC have been investigated. The Mn-Al-O catalyst modified by La2O3 and supported on RFM have been tested in a prototype catalytic water heating boiler and demonstrated a considerable reduction in the emissions of NOx and CO compared to the conventional household boilers. The washcoating of the Mn-La-Al-O catalyst over surface of RFM provides a substantial reduction of toxic  emissions during the catalytic fuel combustion. While an optimal foam structure and composition of the RFM provide improved heat and mass transfer properties of the catalyst in fuel combustion.

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Published

2015-04-10

How to Cite

Yashnik, S. A., Ushakov, V. V., Leonov, N. L., & Ismagilov, Z. R. (2015). High-Performance Mn-Al-O Catalyst on Reticulated Foam Materials for Environmentally Friendly Catalytic Combustion. Eurasian Chemico-Technological Journal, 17(2), 145–158. https://doi.org/10.18321/ectj205

Issue

Vol. 17 No. 2 (2015)

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