Work

What are the impacts of combustion parameters on magnesia aerosol produced in a swirl-stabilized magnesium flame?

Year: 2024

Type: article

Abstract: Magnesium is an alternative to fossil fuels for the production of zero-carbon energy through combustion under air. Metal oxide MgO which is produced appears as white powder that can be trapped and recycled using clean primary energies. A trapping of MgO particles in the combustion system should be as complete as possible for an efficiently closed cycle. In the present study, MgO particles produced by a Mg/air swirled flame in a pilot burner were characterized through different and complementary techniques. More than 89 wt% of MgO particles were trapped in the combustion system. The diameter and the number of MgO particles were measured by means of an Electrical Low Pressure Impactor (ELPI) placed downstream of a cyclone subsystem. An in-depth study of the characteristics of MgO particles collected in the combustion chamber, the cyclone subsystem and on the ELPI plates was carried out. Number size distribution showed that MgO particles collected after the cyclone subsystem were mainly PM1, with a maximum of particles observed in the range 320–760 nm. Evolution of the MgO structure was analyzed by Scanning Electron Microscope (SEM) and Transmission Electron Microscope (TEM). MgO particles collected in the combustion chamber were cubic single crystals which formed first aggregates and micrometric sized particles. A global mechanism for the formation of MgO in the combustion system is finally proposed.Copyright © 2024 American Association for Aerosol Research

Source: Aerosol Science and Technology

DOI: 10.1080/02786826.2024.2430372