Future Fuels for Automotive Gas Turbines

Raymond, Leonard

doi:10.4271/660766

Cited by 2 publications

(2 citation statements)

References 36 publications

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“…In the marine environment, serious corrosion of marine turbine blades has been attributed to alkali metals. In the presence of sulfur oxides produced during fuel combustion, alkali metals form sulfates which initiate hot corrosion of turbine blading made from highly alloyed steels and superalloys. − This is particularly severe for gas turbines operating at gas inlet temperatures greater than 650 °C.…”

Section: Introductionmentioning

confidence: 99%

Inorganic Compounds in Biomass Feedstocks. 1. Effect on the Quality of Fast Pyrolysis Oils

1996

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Inorganic compoundssespecially potassium, calcium, sodium, silicon, phosphorus, and chlorinesare the main constituents of the ash in biomass feedstocks. The concentrations of ash range from less than 1% in softwoods to 15% in herbaceous biomass and agricultural residues. During biomass pyrolysis, these inorganics, especially potassium and calcium, catalyze biomass decomposition and char-forming reactions. Chars formed during these reactions invariably end up in the biomass pyrolysis oils (biocrude oils) as suspended submicron particles. The presence of high concentrations of submicron char particles in biocrude oils will make them problematic for combustion in steam boilers, diesel engines, and turbine operations because of the potential release of the ash and alkali metals during combustion. We experimented with sequential cold filtering of biocrude oils using filters of varying pore size and this revealed that most of the ash and alkali metals detected in biocrude oils are trapped in the chars. Leaching studies conducted on the chars suspended in the oils showed no leaching of alkali metals from the chars into the oils. Cold filtration of the oils dissolved in acetone was ineffective in reducing the alkali metals content to acceptable levels, but hot gas filtration of the pyrolysis vapors reduced the alkali metals content below 10 ppm. Our data suggest that hot gas filtration can potentially reduce the ash and alkali metals content of the biocrude oils to acceptable levels so they can be used as turbine, diesel engine, or boiler fuels.

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Section: Introductionmentioning

confidence: 99%

Inorganic Compounds in Biomass Feedstocks. 1. Effect on the Quality of Fast Pyrolysis Oils

1996

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“…However, the non-structural components can be detrimental to thermochemical fuels production. Ash contains alkali that can cause corrosion of the turbine blades used in generating electric power from the hot combustion gas produced from burning pyrolysis oil (Raymond, 1980;Moses and Bernstein, 1994). High levels of protein can lead to higher levels of char formation (Agblevor, 1993b).…”

Section: Comparison Of the Compositions Of Six Switchgrass Varieties mentioning

confidence: 99%

Second biomass conference of the Americas: Energy, environment, agriculture, and industry. Proceedings

1995

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Future Fuels for Automotive Gas Turbines

Cited by 2 publications

References 36 publications

Inorganic Compounds in Biomass Feedstocks. 1. Effect on the Quality of Fast Pyrolysis Oils

Inorganic Compounds in Biomass Feedstocks. 1. Effect on the Quality of Fast Pyrolysis Oils

Second biomass conference of the Americas: Energy, environment, agriculture, and industry. Proceedings

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