Temperature measurements on burning coal particles in a radiating enclosure

✍ Scribed by M.A. Nettleton

• Publisher: Elsevier Science
• Year: 1965
• Tongue: English
• Weight: 425 KB
• Volume: 9
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(65)90096-9

✦ Synopsis

The colour and brightness temperatures o[ various sizes of devolatilized coal particles have been measured during their combustion in a heated ]urnace tube, containing various mixtures o] oxygen, nitrogen and carbon dioxide. Particle temperatures were measured by comparing their colour or intensity with those o~ a set of tungsten ribbon lamps adjusted to different brightness temperatures, since both lamps and coal particles were ]ound to have similar emissivities in the visible region. These temperatures have been comt~ared with values predicted by equating heat transfer to the particle due to the reaction w*th heat losses ]rom the particle to its surroundings, and closest agreement between theory and practice is obtained, assuming carbon dioxide formation at the surface in air and carbon monoxide formation in oxygen.