OCR Text |
Show TEST PROGRAM The coal used in this test series was a high volatile B bituminous coal from Utah Power and Light Company's Deseret Mine in Central Utah. Particle size distribution and ultimate and proximate analyses for this coal are shown in Table 1. Samples of gasification products were taken from the reactor at up to six radial locations and at seven separate axial locations (13, 20, 28, 34, 51, 81, and 112 cm). Two additional reproduced tests were also completed (20 cm and 51 cm axial locations). The average coal feed rate was 24.5 kg/hr (a= + 0.09 kg/hr). The average oxygen and steam flow rates were 22.3 kg/hr (a = + 0.32 kg/hr) and 6.64 kg/hr (a = + 0.11 kg/hr) respectively. In addition, argon was added as an inert carrier for the coal and as a trace gas in the amount of 3.31 kg/hr (a = ± 0.01 Kg/hr) and 0.81 kg/hr (a = ± 0.004 kg/hr) of nitrogen was added as a purge for the view-port windows. On selected tests, 0.075 kg/hr (a = + 0.002 kg/hr) of helium was added to the secondary stream of steam as second gas tracer. These feed rates gave average oxygen to coal and steam to coal ratios of 0.912 (a = + 0.011) and 0.271 (a = + 0.004) respectively. For these nine gasification experiments, all of the oxygen was introduced with the coal and argon into the primary stream. The steam and helium (when used) were introduced in the secondary stream. The small amount of window nitrogen was introduced at various places down the reactor depending on the location of the view-port test section. TEST RESULTS Measured gas composition data for the nine experimental mapping tests are contained in Table 2. The mole percent (dry basis) of the permanent gasification products (CO, C02, H2, CH4, N2, and 02) and the two inert trace gases, Ar and He, are shown. The sulfur pollutants (H2S, S02, COS, and CS2) and nitrogen pollutants (HCN, NH3 and NO) which were measured both in the gas and liquid phases are shown on a dry, ppm gaseous basis. The permanent gas mole percents and the sulfur and nitrogen 6-8 |