Borio, RW
1994
Pilot- and Bench-Scale Combustion Testing of a Wyoming Subbituminous/Oklahoma Bituminous Coal Blend
Zygarlicke, C.J.; Benson, S.A. and Borio, R.W.
Coal Blending and Switching of Low-Sulfur Western Fuels, 281-300, American Society of Mechanical Engineers, New York, NY, 1994. Funded by US Department of Energy and Electric Power Research Institute.
Combustion ash formation and deposition behavior of Wyoming subbituminous/Oklahoma bituminous coal blends were examined using small-scale testing equipment. Inorganic constituents in the parent coals affected ash behavior. Wyoming entrained ash was finer-sized and enriched in calcium aluminosilicates, while the Oklahoma fly ash was larger-sized and enriched in silica. The 70/30 Wyoming/Oklahoma blend produced worse slag deposits while the 90/10 Wyoming/Oklahoma blend produced worse fouling deposits.
1993
Pilot- and Bench-Scale Combustion Testing of a Wyoming Subbituminous/Oklahoma Bituminous Coal Blend
Zygarlicke, C.J.; Benson, S.A. and Borio, R.W.
Proceedings of the Engineering Foundation Conference on Coal Blending and Switching of Western Low Sulfur Coals, Snowbird, UT, October, 1993 (in press). Funded by US Department of Energy, Electric Power Research Institute and ACERC.
Combustion ash formation and deposition behavior of Wyoming subbituminous/Oklahoma bituminous coal blends were examined using small-scale testing equipment. Inorganic constituents in the parent coals affected ash behavior. Wyoming entrained ash was finer-sized and enriched in calcium aluminosilicates, while the Oklahoma fly ash was larger-sized and enriched in silica. The 70/30 Wyoming/Oklahoma blend produced worse slag deposits while the 90/10 Wyoming/Oklahoma blend produced worse fouling deposits.
1992
Examination of Ash Deposition in Full-, Pilot-, and Bench-Scale Testing
Zygarlicke, C.J.; Benson, S.A.; Borio, R.W. and Mehta, A.K.
Electric Power Research Institute Conference on Coal Quality, San Diego, CA, August 1992. Funded by US Department of Energy, Electric Power Research Institute and ABB-Combustion Engineering.
Ash deposition during pulverized coal combustion was studied in full-, pilot-, and bench-scale systems. Ash deposits were produced from two high-volatile bituminous coals at 1) the Mississippi Power Company Watson Unit 4 utility boiler, 2) the ABB-Combustion Engineering Fireside Performance Test Facility (FPTF), and 3) The Energy & Environmental Research Center (EERC) optical access drop-tube furnace. The chemical and physical characteristics of the slagging and fouling deposits produced in the three systems were examined to determine the components that were responsible for deposit growth and strength development. Similar mineral and amorphous phases, elemental chemistries, and liquid-phase viscosities were observed for full-and bench-scale deposits generate under similar combustion conditions. Although the two test coals were very similar in composition, they performed differently, as evidenced in all three combustion regimes. The "Baseline" coal, a bituminous coal, which is also the baseline coal diet at Watson Unit 4, produced less severe slagging and fouling deposits than the alternate coal which was the "Alternate" a bituminous coal. All three combustion regimes produced data such as quantity and composition of low-viscosity silicate liquid phases, deposit adhesion or bonding strength, deposit crushing strength, and heat flux/heat transfer data which supported the conclusion that the Alternate deposits were more difficult to remove and caused greater impedance to heat transfer.
Borio, RW
1994
Pilot- and Bench-Scale Combustion Testing of a Wyoming Subbituminous/Oklahoma Bituminous Coal Blend
Zygarlicke, C.J.; Benson, S.A. and Borio, R.W.
Coal Blending and Switching of Low-Sulfur Western Fuels, 281-300, American Society of Mechanical Engineers, New York, NY, 1994. Funded by US Department of Energy and Electric Power Research Institute.
Combustion ash formation and deposition behavior of Wyoming subbituminous/Oklahoma bituminous coal blends were examined using small-scale testing equipment. Inorganic constituents in the parent coals affected ash behavior. Wyoming entrained ash was finer-sized and enriched in calcium aluminosilicates, while the Oklahoma fly ash was larger-sized and enriched in silica. The 70/30 Wyoming/Oklahoma blend produced worse slag deposits while the 90/10 Wyoming/Oklahoma blend produced worse fouling deposits.
1993
Pilot- and Bench-Scale Combustion Testing of a Wyoming Subbituminous/Oklahoma Bituminous Coal Blend
Zygarlicke, C.J.; Benson, S.A. and Borio, R.W.
Proceedings of the Engineering Foundation Conference on Coal Blending and Switching of Western Low Sulfur Coals, Snowbird, UT, October, 1993 (in press). Funded by US Department of Energy, Electric Power Research Institute and ACERC.
Combustion ash formation and deposition behavior of Wyoming subbituminous/Oklahoma bituminous coal blends were examined using small-scale testing equipment. Inorganic constituents in the parent coals affected ash behavior. Wyoming entrained ash was finer-sized and enriched in calcium aluminosilicates, while the Oklahoma fly ash was larger-sized and enriched in silica. The 70/30 Wyoming/Oklahoma blend produced worse slag deposits while the 90/10 Wyoming/Oklahoma blend produced worse fouling deposits.
1992
Examination of Ash Deposition in Full-, Pilot-, and Bench-Scale Testing
Zygarlicke, C.J.; Benson, S.A.; Borio, R.W. and Mehta, A.K.
Electric Power Research Institute Conference on Coal Quality, San Diego, CA, August 1992. Funded by US Department of Energy, Electric Power Research Institute and ABB-Combustion Engineering.
Ash deposition during pulverized coal combustion was studied in full-, pilot-, and bench-scale systems. Ash deposits were produced from two high-volatile bituminous coals at 1) the Mississippi Power Company Watson Unit 4 utility boiler, 2) the ABB-Combustion Engineering Fireside Performance Test Facility (FPTF), and 3) The Energy & Environmental Research Center (EERC) optical access drop-tube furnace. The chemical and physical characteristics of the slagging and fouling deposits produced in the three systems were examined to determine the components that were responsible for deposit growth and strength development. Similar mineral and amorphous phases, elemental chemistries, and liquid-phase viscosities were observed for full-and bench-scale deposits generate under similar combustion conditions. Although the two test coals were very similar in composition, they performed differently, as evidenced in all three combustion regimes. The "Baseline" coal, a bituminous coal, which is also the baseline coal diet at Watson Unit 4, produced less severe slagging and fouling deposits than the alternate coal which was the "Alternate" a bituminous coal. All three combustion regimes produced data such as quantity and composition of low-viscosity silicate liquid phases, deposit adhesion or bonding strength, deposit crushing strength, and heat flux/heat transfer data which supported the conclusion that the Alternate deposits were more difficult to remove and caused greater impedance to heat transfer.