Chemical and Biological Engineering ETDs

Publication Date




A complete carbon black pilot plant was employed in this study. Carbon laden gas was produced in a fur­nace and introduced into the outer pipe of a heat ex­changer. Air, at the same time, was introduced into

the inner pipe of the heat exchanger cocurrently with the carbon laden gas. Thus, heat, with temperature dif­ference as driving force, would transfer from the car­bon laden gas to the air stream. The temperatures along the two streams were measured by iron-constantan ther­mal couples and recorded by a multi-reading temperature

recorder. Air supply and fuel (C3H8) supply were intro­duced into the furnace with such rates that about 3oi of combustion would be achieved. The flue gas from the heat exchanger was piped to a collecting system where most of the carbon particles were removed and the gas was released to atmosphere.

With the temperature data and the fuel and air flow rate, plus the thermal property data for the gases involved (obtained from some publications), the dimensionless groups such as Reynolds number, Nusselt number and Prandtl number were calculated and correlated to an equation of the Dittus-Boelter form. Due to heat lost to the ambient and carbon particles deposited on the pipe wall, the heat transfer rate for this system was approximately equal to 1/14 of that of a pure gas system without any significant deposit and heat loss.

Because of the characteristics of this particular experiment, the result may only be recommended to apply on systems that close to this one. In other words, the generality of the obtained equation is re­stricted by the characteristics of the system employed.

Document Type




Degree Name

Chemical Engineering

Level of Degree


Department Name

Chemical and Biological Engineering

First Committee Member (Chair)

Thomas T. Castonguay

Second Committee Member

Kenneth Edward Cox

Third Committee Member

James H. Turner

Third Advisor

R. E. Dascher