Combustion of Carbon in High Temperature, High Velocity Air Streams

The Reaction of Ammonia with Carbon at Elevated Temperatures

“…The interpretation of the results seems clear; the chemical reaction rate is controlling at the lower temperatures (£p>> kA or kx'), but mass transfer becomes controlling at the higher temperatures {kG«kA' or kx'). Similar results have been reported for reactions of carbon with other gases (2,7,10,11,13), as in the work of Tu, Davis, and Hottel on the combustion of carbon spheres in mixtures of oxygen and nitrogen.…”

The Oxidation of Pyrolytic Graphite at Various Temperatures and Air Velocities

“…This velocity effect is in good agreement with theoretical calculations in which diffusion is assumed to bt" the controlling factor. Kuchta 7 defined the rate of a diffusion-controlled process by…”

Kinetics of Coal Gasification: Proposed Mechanism of Gasification; Development of Reaction Rate Equations; Development of Heat Transfer Equations and Method of Calculation; Calculated Relation between Gasifier Yields and Process Variables

“…From the work reported, it may be concluded, with reservation, that diffusion controls the rate of oxidation of carbon at temperatures greater than 1350°F. for velocities up to 50,000 feet per second (82,54,69,60,98,125,126,213). The rate varies as the 0.4 to 0.7 power of the mass velocity with an apparent energy of activation between 2.3 and 5.3 kcal.…”