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The Kinetics of Combustion of Chars Derived from Sewage Sludge by J.S. Dennis; R.J. Lambert; A.J. Milne; S.A. Scott; A.N. Hayhurst is a Engineering article available to read on EtoBox.

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Experiments have been conducted to determine the combustion characteristics of sewage sludge chars in electrically heated beds of silica sand fluidised by air. The effects of the initial size of the char particles, the temperature of the bed and [O 2 ] in the fluidising gas were investigated. Also, the temperatures of burning particles were measured with embedded thermocouples. The kinetics of combustion were measured at temperatures low enough for the CO formed by initial reaction between the carbon and oxygen to burn at some distance away from the particle. Accordingly, the particle is only heated by the enthalpy of the reaction CC0.5O 2 /CO. The activation energy for the intrinsic kinetics of combustion of the char was estimated to be 130-144 kJ/mol. The former value makes allowance for the fact that the particles are at a temperature in excess of that of the bed (determined by a heat balance on a reacting particle), whilst the latter value assumes that the particles are at the same temperature of the bed. It is probable that the lower value is closer to the actual value, thought to be 135G15 kJ/mol, reflecting the catalytic nature of the ash skeleton on which the carbon is supp

Who reads The Kinetics of Combustion of Chars Derived from Sewage Sludge?

Author

J.S. Dennis; R.J. Lambert; A.J. Milne; S.A. Scott; A.N. Hayhurst

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0016-2361)

Published

2005

Language

EN

Field

Engineering (Physical Sciences)