Experimental characterization of the combustion of single lithium particles with CO2. (1st August 2015)

• Record Type: Journal Article
• Authors: Fischer, P.; Schiemann, M.; Scherer, V.; Maas, P.; Schmid, G.; Taroata, D.
• Is Part Of: Fuel. Volume 153(2015)
• Page Start: 90
• Page End: 101
• Publication Date: 2015-08-01
• Subjects: Lithium combustion -- Particle imaging -- Metal combustion -- Energy storage -- Reaction kinetics; Fuel -- Periodicals; Coal -- Periodicals; Coal; Fuel; Periodicals; 662.6
• DOI: 10.1016/j.fuel.2015.02.098
• Languages: English
• ISSNs: 0016-2361

Abstract

Graphical abstract: Highlights: Lithium particles were burned in a laminar flow reactor. The combustion was analyzed conducting imaging pyrometry and particle sampling. The results indicate gas-phase combustion as well as surface reaction. A simplified combustion model was derived from the experimental data. Reaction kinetics was calculated for the surface reaction. Abstract: Combustion and temperature measurement of single lithium particles ( dp < 250 μm) with CO2 was carried out in a laminar flow reactor. An imaging two-color pyrometer system was used to measure particle and flame size as well as combustion temperatures. The results indicate two different combustion phenomena, which have been identified in literature before: Gas-phase reaction at temperatures above 2500 K and surface reaction of lithium with CO2 at temperatures between 1500 and 1800 K. In addition, a sampling probe was utilized to extract burning particles from the reactor. The extracted probes were analyzed concerning their constituents using X-ray diffraction analysis and their shape and surface with scanning electron microscopy. The results showed lithium carbonate as main reaction product and a relatively smooth surface of the particles after burn-out. Combining the experimental findings, a single particle combustion model was suggested and apparent reaction kinetics was determined.