clean fossil fuel Use the onefilm model to determine the sur

clean fossil fuel

Use the one-film model to determine the surface temperature of a 1-mm diameter carbon particle burning in air (y_02, infinity = 0.233) Both the air and the surroundings are at 300K. Assume diffusion control and e, -1 Is diffusional control a good assumption? Discuss

Solution

the type of char and the concentration of oxygen in the air effect the evolution of temperature of the particles during combustion.

generally for the particles of 1mm diameter the temperature is assuumed to be 50 degree centigrade.

based on the energy balance also we can find the particle temperature

diffusion controlled reactions are the reactions which occur so fast and if the reactants of same chemical nature that is with the same stoichiometry combine the product species will form

here in these type of reactions formation of products is much quicker from activated complex than diffusion of products

diffused controlled reactions lowers the activation energy

this type of reaction is not that better to one film model when compared to other reactions