Coal dust flammability experiments are essential in order to evaluate propagation limit concentrations and the fundamental burning velocity rate as a function of dust concentration. This paper presents such data for Pittsburgh seam bituminous coal dust using a relatively large scale horizontal flammability apparatus, the gravity tumbler flammability tube (GTFT). The reported lean limit (based on propagating a steady state constant pressure flame) was measured as 420 g/m3, a factor of two or three greater than that reported from the modified Hartmann bomb apparatus. A maximum steady state flame speed was measured as 34 cm/s, at a concentration of 900 g/m3, a value greater than that observed when using held flame facilities.
ASJC Scopus subject areas
- Chemical Engineering(all)
- Fuel Technology
- Energy Engineering and Power Technology
- Physics and Astronomy(all)