GoBiGas

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• GoBiGas
• - gasification of forest waste in western Sweden
• by
• Henry Kenamets, Göteborg Energi AB

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Göteborg Energi 2007
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Emissions 19732005
Energy (GWh)
Emissions
S (ton) Nox (ton) Co2 (ton) Total heat
production (GWh) Heat from Göteborg Energis
plants (GWh)
0
1984
1980
1988
1997
1992
2001
2003
2004
2005
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Biogas from a Göteborg perspective
Fulfilling our vision Göteborg Energi shall
actively contribute to the development of a
sustainable Göteborg
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Biogas vision of Göteborg Energi AB

• The target is to successively
• replace natural gas with biogas

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Green gas principle
Huge synergy effects arise when distributing
biogas in the natural gas grid
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Advantages of biogas in the natural gas grid

• Market potential is growing.
• More customers have the opportunity to replace
  other fuels with biogas. This reduces pollution.
• The surplus of biogas produced during the summer
  can be pumped into the natural gas grid instead
  of being burnt off.
• The reliability of the biogas supply improves by
  connecting the biogas grid

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Project Biogas Arendal

• Fermentation of sludge from wastewater treatment
  plant
• Removal of CO2 increases calorific value from 6
  kWh/Nm3 to 11 kWh/Nm3
• The plant is in operation since January 2007
• Production of biogas 50 - 60 GWh/year

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GoBiGas Gothenburg Biomass Gasification Project
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Purpose and objective of GoBiGas

• The purpose of the project is to demonstrate the
  possibilities of the gasification technology on a
  commercial scale, and to build a gasification
  unit that produces renewable and CO2-neutral
  natural gas. The objective of this is to take a
  significant step towards Göteborg Energi ABs
  long-term target to replace the natural gas in
  our own plants and meet our customers demand for
  renewable gas.

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The GoBiGas Project

• Thermo-gasification of biomass and production of
  bio-methane
• Commercial scale approximately 100 MW gas
• Production of high-calorific gas by methanation
  for distribution on the gas grid
• Also possible to use as a CHP-fuel in the gas
  turbines of Rya
• Planned to be in operation by 2012

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Production of bio-methane for different purposes
and customers
Gas- grid
Processes
Rya CHP
Heating
Vehicle fuel
Cleaning
Fuel handling
Gas- ification
Methan- ation
Cleaning
Com- pression
Drying
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Pressurised gasification with oxygen
CO2
Fuel dryertreatm. feed
Oxygen
Gasifier
ASU
GasHT filter
Tarcracker
Steam
Gascooler
CO2
Steam
Steam
Shift
Steam
H2S removal
CO2 removal
Methanation
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Allothermal gasification
Fueldryer
Fueltreatm. feed
Flue gas
Combustor
Gasifier
Steam
Cooling
H2S,
(CO2)
Steam
Purgestream
Shift
Gas scrubber (oil)
H2S (CO2)removal
H2O
CO2
Methanation
CO2removal
SNG
Cooling
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GoBiGas
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(No Transcript)
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Current activities in GoBiGas

• The board of Göteborg Energi AB in February 2007
  decided to support the GoBiGas project at least
  until decision of preliminary investment summer
  2008.
• Discussions with three suppliers of equipment
  about different technical solutions.
• Permits
• Supply of biomass
• Financing of investment

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GoBiGas One plant Many possibilities
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Development of
Gas vehicles
Gas filling stations
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Gas filling station for cars
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Existing and planned gas filling stations
Uppsala
Karlstad
Västerås
Åmål
Örebro (1)1
Lidköping
Arlanda
Strömstad
Stockholm (7) 4
Skara
Södertälje
Tanum
Eskilstuna
Vänersborg
Katrineholm
Trollhättan
Uddevalla
Nyköping
Lilla Edet
Norrköping (3)
Skövde
Stenungsund
Mariestad
Kungälv
Alingsås
Lerum
Linköping (5)
Falköping
Partille
Huskvarna
Motala
Göteborg (8) 3
Mölndal
Ulricehamn
Nässjö
Mölnlycke
Västervik
Kinna
Borås
Kungsbacka
Mjölby
Varberg
Gislaved
Jönköping
Värnamo
Falkenberg
Gnosjö
Halmstad
Kalmar
Båstad
Laholm
Olofström
Höganäs
Ängelholm
Hässleholm
Helsingborg (3)
Åstorp
Landskrona
Kristianstad (2)
Lund
Malmö (4)
Eslöv

Ystad
existing gas filling stations 2005
stations constructed 2006-2007
Stations in northern Sweden Boden, Skellefteå
and Östersund
2006-08-24
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Thank you for listening!