This paper describes the experiences leading to successful sampling of hot, contaminated, coal-derived gas streams for alkali constituents using advanced spectrometers. This activity was integrated with a multi-phase, combustion test program which addressed the use of minimally treated, coal-derived fuel gas in gas turbines. Alkali contaminants in coal-derived fuels are a source of concern, as they may induce corrosion of and deposition on turbine components. Real-time measurement of alkali concentrations in gasifier output fuel gas streams is important in evaluating these effects on turbine performance. An automated, dual-channel, flame atomic emission spectrometer was used to obtain on-line measurements of total sodium and potassium mass loadings (vapors and particles) in two process streams at the General Electric fixed-bed coal gasifier and turbine combustor simulator facility in Schenectady, New York. Alkali measurements were taken on (1) slipstreams of high temperature, high pressure, minimally clean, low-Btu fuel gas containing entrained particles from the gasifier and (2) a slipstream of the exhaust gas from the combustor/turbine simulator. Alkali detection limits for the analyzer were found to be on the order of one part per billion. Providing a representative sample to the alkali analyzer at the limited flows required by the instrument was a major challenge of this activity. Several approaches and sampling hardware configurations were utilized with varying degrees of success during this testing campaign. The resulting information formed the basis for a second generation sampling system which has recently been successfully utilized to measure alkali concentrations in slipstreams from the described fixed-bed coal gasifier and turbine combustor simulator.
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ASME 1985 International Gas Turbine Conference and Exhibit
March 18–21, 1985
Houston, Texas, USA
Conference Sponsors:
- International Gas Turbine Institute
ISBN:
978-0-7918-7939-9
PROCEEDINGS PAPER
Sampling and Analysis of Alkali in High-Temperature, High-Pressure Gasification Streams
Cynthia K. McCurry,
Cynthia K. McCurry
U.S. Department of Energy, Morgantown Energy Technology Center, Morgantown, WV
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Robert R. Romanosky, Jr.
Robert R. Romanosky, Jr.
U.S. Department of Energy, Morgantown Energy Technology Center, Morgantown, WV
Search for other works by this author on:
Cynthia K. McCurry
U.S. Department of Energy, Morgantown Energy Technology Center, Morgantown, WV
Robert R. Romanosky, Jr.
U.S. Department of Energy, Morgantown Energy Technology Center, Morgantown, WV
Paper No:
85-GT-202, V002T05A012; 8 pages
Published Online:
March 31, 2015
Citation
McCurry, CK, & Romanosky, RR, Jr. "Sampling and Analysis of Alkali in High-Temperature, High-Pressure Gasification Streams." Proceedings of the ASME 1985 International Gas Turbine Conference and Exhibit. Volume 2: Coal, Biomass and Alternative Fuels; Combustion and Fuels; Oil and Gas Applications; Cycle Innovations. Houston, Texas, USA. March 18–21, 1985. V002T05A012. ASME. https://doi.org/10.1115/85-GT-202
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