Sökning: "Thermochemical energy conversion"

Visar resultat 21 - 25 av 54 avhandlingar innehållade orden Thermochemical energy conversion.

1. 21. Thermochemical model studies of some high temperature solar energy conversion processes

   Författare :Mats Lundberg; Umeå universitet; []
   Nyckelord :solar energy conversion; cyclic processes; water splitting; hydrogen production; carbothermal reduction; Co-Fe-0 system; phase relations; solid state emf measurements;

   Sammanfattning : This thesis is a summary and discussion of five papers, mainly dealing with processes where solar thermal energy is utilized in the production of chemicals with high energy contents. The products considered in the present work are H2, Al, and Mg. LÄS MER

3. 22. Integration of thermochemical processes with existing waste management industries to enhance biomethane production

   Författare :Chaudhary Awais Salman; Jinyue Yan; Eva Thorin; Yang Weihong; Mälardalens högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; polygeneration; process integration; integrated biorefineries; biomethane; Energy- and Environmental Engineering; energi- och miljöteknik;

   Sammanfattning : In most waste management industries, waste is separated into different fractions, each of which is treated with suitable processes. Established technologies such as waste combustion for combined heat and power (CHP) production and biomethane production through anaerobic digestion (AD) of biodegradable waste work fine as standalone processes. LÄS MER

4. 23. Comparative study of residue pellets from cane sugar and palm-oil industries with commercial wood pellets, applied in downdraft gasification

   Författare :Catharina Erlich; Torsten Fransson; Björn Zethraeus; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; energy engineering; Mechanical and thermal engineering; Mekanisk och termisk energiteknik;

   Sammanfattning : While biomass utilization for energy conversion in the industrialized nations is being largely developed, highly efficient and environmentally friendly, many tropical countries still use biomass at low efficiencies and high emission levels. The main reasons for these gaps are both political and technological: the energy markets are different, the Gross National Product (GDP) differs widely, and the feedstock differs in form and conversion behaviour. LÄS MER

5. 24. Phosphorus recovery from sewage sludge fluidized bed gasification processes

   Författare :Thomas Karl Hannl; Marcus Öhman; Matthias Kuba; Nils Skoglund; Flemming Jappe Frandsen; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; gasification; sewage sludge; agricultural residues; bed material; fluidized bed; feldspar; ash transformation; potassium; phosphorus; ICP-AES MS; SEM; EDS; XRD; thermodynamic equilibrium modeling; Energy Engineering; Energiteknik;

   Sammanfattning : One of the most sustainable pathways of sewage sludge treatment in recent years has been thermal conversion. The benefits of thermal treatment of sewage sludge are the recovery of energy or valuable chemical products, the destruction of harmful organic compounds, the separation of heavy metals from the P-rich coarse ash fraction, and the decreased and sanitized ash volume. LÄS MER

7. 25. Particle dynamics during biomass devolatilization : Momentum exchange and particle dispersion

   Författare :Angel David Garcia Llamas; Kentaro Umeki; Rikard Gebart; Per Gren; Peter Glarborg; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biomass; devolatilization; rocketing; PIV; PTV; Energiteknik; Energy Engineering;

   Sammanfattning : Devolatilization is a heat-driven thermochemical process in which a liquid or a solid fuel releases mass in the form of volatile compounds after drying, as a result of the combination of endothermic and exothermic reactions. It differs from pyrolysis in that it does not require an inert atmosphere and that the reactant must be either solid or liquid. LÄS MER