Azuhata, S
1986
Effects of Flame Type and Pressure on Entrained Coal Gasification
Azuhata, S.; Hedman, P.O.; Smoot, L.D. and Sowa, W.A.
Fuel, 65, 1511-1515, 1986. 5 pgs. Funded by Morgantown Energy Technology Center.
An experimental study of pulverized coal gasification was performed to evaluate the effects of flame type and gasifier pressure. O2/coal ratio (0.53-1.09 kg/kg), coal feed rate (22.9-34.5 kg/h), and pressure (100, 500 and 1050 K Pa) were varied for premixed and diffusion flames in the gasifier. Premixing of coal and oxygen markedly increased carbon conversion, compared with that for diffusion flames at constant pressure. Above an O2/coal ratio of 0.8, carbon conversion increased with increasing pressure for diffusion flames, but no such increase was observed for premixed flames. At higher pressures in premixed flames, all reactions were completed near the burner with little change in gas concentrations elsewhere in the gasifier.
Carbon Conversion in an Atmospheric-Pressure Entrained Coal Gasifier
Azuhata, S.; Hedman, P.O. and Smoot, L.D.
Fuel, 65, 212-217, 1986. 6 pgs. Funded by Morgantown Energy Technology Center.
Entrained gasification tests with a Utah high-volatile bituminous coal were performed at atmospheric pressure to assess the influence of particle size, coal feed rate, steam-coal ratio and oxygen-coal ratio. Independent argon-carbon balance and ash balance methods were used to evaluate carbon conversion, with good agreement observed between the methods. A higher O2-coal ratio and finer particles increased the carbon conversion. Carbon conversion and hydrogen formation showed little dependence on the amount of steam injected in the secondary stream, indicating minimal steam-coal reaction. When the coal feed rate was varied from 23 to 27 kg/h, a small increase in carbon conversion was observed with no significant change in the gas composition.
Azuhata, S
1986
Effects of Flame Type and Pressure on Entrained Coal Gasification
Azuhata, S.; Hedman, P.O.; Smoot, L.D. and Sowa, W.A.
Fuel, 65, 1511-1515, 1986. 5 pgs. Funded by Morgantown Energy Technology Center.
An experimental study of pulverized coal gasification was performed to evaluate the effects of flame type and gasifier pressure. O2/coal ratio (0.53-1.09 kg/kg), coal feed rate (22.9-34.5 kg/h), and pressure (100, 500 and 1050 K Pa) were varied for premixed and diffusion flames in the gasifier. Premixing of coal and oxygen markedly increased carbon conversion, compared with that for diffusion flames at constant pressure. Above an O2/coal ratio of 0.8, carbon conversion increased with increasing pressure for diffusion flames, but no such increase was observed for premixed flames. At higher pressures in premixed flames, all reactions were completed near the burner with little change in gas concentrations elsewhere in the gasifier.
Carbon Conversion in an Atmospheric-Pressure Entrained Coal Gasifier
Azuhata, S.; Hedman, P.O. and Smoot, L.D.
Fuel, 65, 212-217, 1986. 6 pgs. Funded by Morgantown Energy Technology Center.
Entrained gasification tests with a Utah high-volatile bituminous coal were performed at atmospheric pressure to assess the influence of particle size, coal feed rate, steam-coal ratio and oxygen-coal ratio. Independent argon-carbon balance and ash balance methods were used to evaluate carbon conversion, with good agreement observed between the methods. A higher O2-coal ratio and finer particles increased the carbon conversion. Carbon conversion and hydrogen formation showed little dependence on the amount of steam injected in the secondary stream, indicating minimal steam-coal reaction. When the coal feed rate was varied from 23 to 27 kg/h, a small increase in carbon conversion was observed with no significant change in the gas composition.