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

Articles in Press

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), P.O. Box: 15815-3538, Tehran, Iran.

Abstract

The possibility of releasing unburned hydrocarbons and other compounds resulting from incomplete combustion from the exhaust is considered one of the common issues in industries. Pathing the exhaust gas through catalysts is a common way to lower the emissions. On the other hand, catalytic flameless combustion, which are used due to their optimal performance in wide range of dilute air-fuel mixtures, are of interest with a low emmition and high combustion efficiency of over 90% for local radiative heating applications. The use of platinum catalyst in these systems leads to an increase in the production costs and the surface temperature in the range of 400-600°C facing a temperature limit in some applications. In this study, the feasibility of using a Pd-Au catalyst in a flameless catalytic counter-diffusive system was experimentally evaluated for the first time to reduce pollutants with lower temperature and less production costs. Methane conversion rate of 98.3% in the temperature range of 200-250°C and long life without CO and NOx pollutants were observed. This not only leads to the reduction of environmental pollutants, but also by producing low-temperature radiant heat, it provides the possibility of producing heat from the exhaust gases which makes it a dual-function solution in the field.

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Journal of Particle Science and Technology

Articles in Press, Accepted Manuscript
Available Online from 01 September 2024

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History

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

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