Hydrothermally grown nano-manganese oxide on clinoptilolite for low-temperature propane-selective catalytic reduction of NOx

  • Ali Mirzaei Dakdareh
  • Cavus FalamakiEmail author
  • Naser Ghasemian
Research Paper


A novel nano-size MnxOy/clinoptilolite catalyst of high activity for propane-SCR reaction of NOx at low temperatures has been synthesized by a hydrothermal method in a temperature range of 80–180 °C. The optimum synthesis temperature resulting in maximum NOx conversion was 150 °C. An optimum manganese oxide loading of 0.2 wt.% results in the best catalytic behavior (71% NOx conversion). All catalysts exhibited an optimal propane-SCR reaction temperature of 200 °C. The optimum catalyst produces no detectable CO (GHSV 27,000 h) at 200 °C. Manganese in the optimum catalyst exists as Mn2+ (37.8%), Mn3+ (14.2%), and Mn4+ (48%).

Graphical abstract

Flake-like manganese oxide nanostructures (indicated by an arrow in the TEM picture) next to the clinoptilolite zeolite sheet-like crystals result in a promising low-temperature propane-selective catalytic reduction of NOx.


NOx abatement Selective catalytic reduction Manganese oxide Clinoptilolite Hydrothermal growth Nanostructured catalysts 



Eng. Bahram Mousavi is highly acknowledged for providing the gas analyzer.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Nature B.V. 2018

Authors and Affiliations

  • Ali Mirzaei Dakdareh
    • 1
  • Cavus Falamaki
    • 1
    • 2
    Email author
  • Naser Ghasemian
    • 3
  1. 1.Chemical Engineering DepartmentAmirkabir University of TechnologyTehranIran
  2. 2.Petrochemical Center of ExcellenceAmirkabir University of TechnologyTehranIran
  3. 3.Polymer Science and Engineering DepartmentUniversity of BonabBonabIran

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