Sulfur removal from coal-fired Rijke-type pulsating combustor by burning with calcium carbonate particles

The control of SO₂ emissions from a coal-burning Rijke-type pulsating combustor has been studied by adding limestone or dolomite in the combustion zone. The limestone or dolomite particles, employed in the study are divided into three classes, i.e., 0.5 mm, 1.5 mm and 2.75 mm mean size, while the mean size of the coal particles is 12.7 mm. Results from the experimental tests show that the optimal sulfur removal temperature is about 880°C which is consistent with those from conventional combustor tests. The percent of sulfur retention achieved can be as high as 98% by using dolomite particles of 0.5 mm in size and Ca/S=3.6. The results show that as far as the sulfur retention is concerned, the Rijke-type pulsating combustor performs better: than another conventional combustors.