Eai presentation green power conference hyderabad jan 2010

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  • ==Range of biomass feedstock -> Agri residues -> dedicated energy crops -> forest residues -> urban wood wastes -> wood mill waste
  • Plasma gasification - - breaking down matterat the atomic level by exposing it to very high temperature plasma arcs
  • Raw biomass has relatively low-energy density, too much moisture, is too hygroscopic, can rot during storage and difficult to grind into small particles. Numerous pre-treatment methods have been suggested, key being torrefactionTorrefaction results in:Increased energy densityDecreased volumeof biomassDecreased amount of volatilesIncreased amount of fixed carbon

Transcript

  • 1. Biomass Power Generation : Recent Trends in Technology
    and Future Possibilities
    NarasimhanSanthanam
    Energy Alternatives India, www.eai.in
  • 2. About EAI
    • Leading Indian renewable energy business intelligence, market strategy consulting firm
    • 3. Work on all primary renewable energy sectors – solar, wind, bio-fuels / biomass, waste-to-energy and small hydro
    • 4. Work on market research, entry and diversification strategy, economic and financial modeling and pre-feasibility analysis
    • 5. Team comprises professionals from IITs and IIMs, with renewable energy, industry research and economics backgrounds
    • 6. Based out of Chennai, India
    • 7. More at www.eai.in
  • What Am I Here For?
    • Imperatives for Power Generation Industry
    • 8. Prospective Solutions
    • 9. Role of Biomass in these Solutions
    • 10. Processes and Technologies in Biomass-based Power Generation
    • 11. Current Trends
    • 12. Future Prospects
  • Tech -> Solutions -> Imperatives
  • 13. Imperatives
    Environmentally sustainable electricity production
    Electricity for rural and remote areas
    Socially beneficial electricity production
    More reliable electricity production from renewable sources
  • 14. Prospective Solutions
    Distributed electricity generation
    Electricity generation with less GHG emissions
    Combining synergistic revenue streams for economically sustainable power production
    Combining different renewable energy sources for power generation to ensure stability and reliability
  • 15. Role of Biomass in the Solutions
    Wide range of biomass feedstock
    Waste biomass and energy crops available in a distributed manner
    Biomass as a feedstock instead of fossil fuels at power plants
    Possibility of useful products such as biofertilizers and biofuels along with electricity
    Flexibility to integrate biomass with other renewable sources such as solar and wind.
  • 16. Biomass-based Power Gen Processes and Technologies
    Gasification and pyrolysis
    Use of biomass as partial feedstock in power plants for co-firing
    Anaerobic digestion
  • 17. Tech, Processes & Solutions
    Combining different renewable energy sources for power generation to ensure stability and reliability
    Gasification and pyrolysis
    Combining synergistic revenue streams for economically sustainable power production
    Anaerobic digestion
    Distributed electricity generation
    Use of biomass as partial feedstock in power plants for co-firing
    Electricity generation with less GHG emissions
  • 18. Gasification and Pyrolysis
    Scalable
    Biomass agnostic
    Distributed electricity generation
    Production of valuable co-products such as biochar
    An established technology with potential for innovations
  • 19. Gasification/Pyrolysis – Current Trends
    Current
    Types of gasifiers - Updraft; downdraft; Fluidized bed; Entrained flow. Also: One stage and two stage gasifiers
    High temperature treatment for easy removal of ash contaning heavy metals.
    Electric power generated in engines and gas turbines, which are cheaper and more efficient than the steam cycle used in incineration
  • 20. Gasification/Pyrolysis –Future Trends
    Future
    • Plasma gasification
    • 21. Use of fuel cells for electricity generation
    • 22. Significant advancements possible for:
    • 23. Flexibility in biomass range
    • 24. Slagging problem for biomass with low melting point
    • 25. Reducing tar contamination in gas flow
  • Use of Biomass for Co-firing in Power Plants
    Less net GHG emissions compared to 100% coal power plants
    Over 200 power plants worldwide using it
    Could be a critical route used by power plants in the short and medium term as an important GHG reduction strategy
  • 26. Biomass Cofiring – Current Trends
    Current
    Max 20% biomass used
    Process and material improvements for increased efficiency and decrease costs
    Many technical bottlenecks in biomass co-firing are ash related; dedicated toolboxes are being developed to tackle these
  • 27. Biomass Cofiring – Future Trends
    Future
    • Increase of cofiring %s to 50% w/w
    • 28. Lower-quality (“salty”) biomass, higher fuel flexibility (per unit or by combining different units)
    • 29. Integration with clean coal tech
    • 30. Boilers with ultra-supercritical steam tech
    • 31. Oxy-fuel combustion
    • 32. IGCC
    • 33. Torrefaction - thermal treatment of raw biomass materials in temperature range 200-300 C under inert atmosphere with aim of partial decomposition. A charcoal-like fuel is the result.
  • Anaerobic Digestion
    Can use waste biomass that present disposal problems
    Can be a distributed avenue for power generation
    Suitable for industrial and domestic waste biomass
  • 34. AD – Current and Future Trends
    Current
    Modifications in reactor designs and processes for higher efficiency of digestion
    Newer and more efficient gas engines
    Future
    Using the AD effluent to grow biofuel feedstock such as algae
  • 35. Other Trends and Innovations
    Use of renewable energy such as solar thermal to produce syngas
    New technologies and processes for biomass harvesting, processing and handling.
    Dedicated energy crops for power production
    Innovations in biomass logistics and transportation.
  • 36. Biomass Power – Now and Future
  • 37. Inference
    Biomass has the potential to be a more significant contributor to the world’s “green” electricity
    For this to happen, significant advances in technology and processes are required
    The pace at which advances are taking place are less than satisfactory; higher governmental and industry support for R&D and incentives required
  • 38. Thank you
    NarasimhanSanthanam
    Energy Alternatives India, www.eai.in
    narsi@clixoo.com
    Mob: 98413-48117