Experimental evaluation of a dual-function solution for reducing flue gas pollutants using low-temperature counter-diffusive combustion of methane with Au0.06-Pd0.06/Al2O3 Catalyst

Document Type : Research Article

Authors

1 Department of Mechanical Engineering, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran

2 Department of Mechanical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran

3 Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), Tehran, Iran

Abstract

The possibility of releasing unburned hydrocarbons and other compounds resulting from incomplete combustion from the exhaust is considered a common industrial issue. Pathing the exhaust gas through catalysts is a common way to lower the emissions. Alternatively, catalytic flameless combustion, used in a wide range of dilute air-fuel mixtures due to its optimal performance, is of interest for local radiative heating applications because of its low emission and high combustion efficiency (over 90%). However, using platinum catalysts in these systems increases production costs, and its surface temperature, ranging from 400-600 °C, faces a temperature limit in some applications. In this study, the feasibility of using a Pd-Au catalyst, with lower temperature and production costs, in a flameless catalytic counter-diffusive system was experimentally evaluated for the first time to reduce pollutants. A methane conversion rate of 98.3% in the 200-250 °C temperature range and a long life without CO and NOx pollutants were observed. This not only leads to reducing environmental pollutants, but by producing low-temperature radiant heat, it also provides the possibility of producing heat from exhaust gases, making it a dual-function solution in the field.

Graphical Abstract

Experimental evaluation of a dual-function solution for reducing flue gas pollutants using low-temperature counter-diffusive combustion of methane with Au0.06-Pd0.06/Al2O3 Catalyst

Highlights

  • Catalysts can be employed to reduce CH4 emission from the exhausts.
  • Feasibility of using Catalytic Flameless Combustion with Au0.06-Pd0.06/Al2O3 catalyst in a Dual-Function (Heating-Emission Control) application is investigated experimentally.
  • Optimum performance along with low production cost are the main criteria of this research.

Keywords

Main Subjects

Copyright © 2024 The Author(s). Published by IROST.

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Journal of Particle Science and Technology
Volume 10, Issue 1
May 2024
Pages 41-49

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History

  • Receive Date: 02 July 2024
  • Revise Date: 26 August 2024
  • Accept Date: 01 September 2024

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