Effect of Rapid-Heating Rate on Coal Nitrogen and Sulfur Release. Quarterly Technical Progress Report No. 1, August 19-December 19, 1981

摘要

A laser pyrolysis technique is applied to the investigation of the effects of heating rate on release of coal-bound sulfur and nitrogen. Entrained coal particles flowing in an inert atmosphere are subjected to a high power laser beam. The rapid heating causes pyrolysis and subsequent release of volatile matter. Diagnostics have been developed to measure the particle temperature as a function of time in the laser beam. This measurement will give the heating rate of the coal particles. The interference of volatile matter with the spectroscopic measurements, through emission/absorption was eliminated. The experimental set up and the diagnostic techniques are described as well as the analysis by which the experimental data can be reduced to a useful engineering form. Following a general introduction, section 2 of the report describes the phenomenology of laser heating. The experimental set up including the diagnostics and instrumentation is described in detail in section 3. A discussion of the observations during many preliminary runs is given in section 4. These runs were primarily intended to help to fine-tune the experiment and the diagnostics. (ERA citation 07:042058)