Search for dissertations about: "KCl"

Showing result 1 - 5 of 63 swedish dissertations containing the word KCl.

  1. 1. Strategies to reduce gaseous KCl and chlorine in deposits during combustion of biomass in fluidised bed boilers

    University dissertation from Chalmers University of Technology

    Author : Håkan Kassman; Chalmers tekniska högskola.; Chalmers University of Technology.; [2012]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Övrig kemiteknik; Other chemical engineering; Termisk energiteknik; Thermal energy engineering; Miljöteknik; Environmental engineering; Sulphation; KCl; Combustion of biomass; Peat; Ammonium sulphate; IACM; Chlorine in deposits;

    Abstract : Combustion of a biomass with an enhanced content of alkali and chlorine (Cl) can result in operational problems including deposit formation and superheater corrosion. The strategies applied to reduce such problems include co-combustion and the use of additives. READ MORE

  2. 2. High Temperature Corrosion of FeCrAl Alloys: The influence of water vapour and alkali salt

    University dissertation from Chalmers University of Technology

    Author : Niklas Israelsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FeCrAl; oxidation; water vapour; alumina; high temperature corrosion; KCl; pre-oxidation; kinetics;

    Abstract : The corrosive environment in biomass- and waste-fired boilers has been known for several years. The traditionally used FeCr and FeNiCr steels show limited performance in the aggressive environment that contains more H2O and alkali salts than traditional fuel. READ MORE

  3. 3. High Temperature Oxidation and Chlorination of FeCrAl alloys

    University dissertation from Chalmers University of Technology

    Author : Niklas Israelsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; FeCrAl; high-temperature corrosion; KCl; H2O; pre-oxidation; kinetics;

    Abstract : Abstract The constant strive for improved efficiency and lower-cost industrial processes often results in progressively higher temperatures and more aggressive environments. High- temperature corrosion is a well-known problem in biomass- and waste-fired boilers and is one of the obstacles to overcome in achieving a more sustainable society. READ MORE

  4. 4. Alkali Induced High Temperature Corrosion of Stainless Steel - Experiences from Laboratory and Field

    University dissertation from Chalmers University of Technology

    Author : Jesper Pettersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Fasta tillståndets kemi; Solid state chemistry; Materialkemi; Materials chemistry; KCl; Chromate; Chlorine; Corrosion; 304L; Deposit; Biomass; Waste;

    Abstract : The high temperature corrosion of steam superheaters is a major obstacle that has to be overcome in order to increase the electricity generating efficiency of power boilers burning biomass or waste. This thesis addresses this issue by a combination of well-controlled model experiments in the laboratory and short and long term field exposures using cooled probes in full-scale biomass and waste fired boilers. READ MORE

  5. 5. Alkali Induced Corrosion of 304L, The Influence of Potassium Salts and Water Vapour

    University dissertation from Chalmers University of Technology

    Author : Jesper Pettersson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2005]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Kemi; Chemistry; Oxidation; Alkali; KCl; Deposit; Breakaway Corrosion; 304L;

    Abstract : This work investigates the influence of alkali salts on the oxidation of 304-type (Fe18Cr10Ni) austenitic stainless steel in laboratory and field exposures. Stainless steel coupons were exposed isothermally in laboratory furnaces at 400-600 °C in 5% O2 and 5% O2 + 40% H2O. Thermobalance exposures were also performed. READ MORE