Clean coal

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Condensation towers on a coal fired power station
Condensation towers on a coal fired power station
Belchatow power station in Poland
Belchatow power station in Poland

"Clean coal" is a term coined by industry and government to describe as yet unproven methods of burning coal for producing energy with reduced carbon emissions. The term is actually misleading as burning coal for energy will never result in zero emissions. The term "clean coal", which has been described by some as an oxymoron, is also used interchangeably with "carbon capture and sequestration (CCS)".

Contents

Serious concerns raised about CCS

The are numerous concerns about the use of the term "clean coal", including:

  • CCS is not yet proven and there is a high risk that it will not actually be possible or viable
  • Carbon dioxide escaping from underground storage could be lethal
  • The United States government recently pulled its participation and funding from the clean coal/CCS pilot project called FutureGen (see below for details)
  • Burying (sequestering) huge amounts of liquefied CO2 is unlikely to be possible, and keeping it there will be problematic
  • There will be high energy costs (and more emissions) to pump CO2 from sources such as power stations to locations where it may be stored.
  • It will be very expensive to develop and deploy - probably more expensive than proven renewable zero emission solutions such as wind, solar and geothermal energy within 5 to 10 years.
  • Much more coal will have to be burnt to power CCS (up to 30% more)
  • Cannot capture all emissions from a power station so that even if widely used greenhouse emissions would not fall or stabilise but actually continue to increase
  • It is highly unlikely CCS technology (if it works) will be able to be retrofitted to existing coal fired power stations - which should be decommissioned.
  • CCS, if it can be made viable, is likely to be unable to handle the volume of carbon emissions from coal. While CCS proponents often point out that carbon sequestration projects are already in operation, the largest in existence (Sleipner, in Norway) currently buries just 1 million tonnes per annum (Mtpa) of carbon dioxide. Victoria has 65 million tonnes of CO2 from stationery electricity alone and this figure is growing exponentially
  • CCS, if it can be made to work, won't be available for deployment earlier than 2020 (possibly even 2030) so it would be to late to reduce emissions over the next two decades - which is arguably now the critical period. The Massachusetts Institute of Technology interdisciplinary expert study on The Future of Coal envisages that coal with CCS may begin to make a contribution to emissions reductions around 2025. A similar result was obtained in an earlier assessment by the Australia Institute.

Origin and use of the term "clean coal"

The exact origin of the term "clean coal" is not clear. However, the phrase "clean coal" has developed a life of its own due to a barrage of commercial propagandising. For example, in 2008 year a coalition of US coal mining companies and electricity utilities called Americans for Balanced Energy Choices (and recently renamed the American Coalition for Clean Coal Electricity) is paying the advertising agency R&R Partners $35m (£22m) to promote "clean coal" through advertising and other promotional activity.[1]

Politicians in many countries, including the United States, Australia and Great Britain, use the term frequently and liberally, which helps to support the myth that it is real and it exists. Legal attempts in Australia to stop the use of this term (by energy companies and politicians) because it is misleading and in breach of the Trade Practices Act have so far been unsuccessful.

Policy implications

  • Government funding and effort expended on "clean coal" will detract from that for proven renewable energy technologies that are available now
  • The coal industry should be funding CCS, not the taxpayer
  • We need roadmap to exit from coal fired power, not go looking for reasons and excuses to keep burning it.
  • Government funding for CCS is actually just another subsidy to the already highly subsidised, private and highly profitable fossil fuel energy sector.

Some groups claiming to be "for the environment" such as the World Wildlife Fund (WWF) and the Climate Institute have recently endorsed "clean coal" and "CCS" as viable options for addressing climate change and receiving government funding.[2]

It is a concern that such groups are participating in industry and government spin which will hijack and confuse real action to address climate change, the end result of which could be catastrophic.

It is inappropriate for governments to fund and promote CCS as a viable solution for climate change that is on par with genuine zero emission renewable energy options such as wind and solar.

Note that CCS technology is viable and in use for separating and burying CO2 from natural gas at the Gorgon and other gas fields on the North-West Shelf. This is much more efficient than attempting to capture and store CO2 from burning coal, and the CO2 is pumped back into the same well the natural gas is extracted from.

Government funding should be immediately withdrawn from CCS research and development and redirected towards zero emission energy solutions, re-training programs for workers to move from polluting industries into sustainable, renewable energy projects and into carbon sink projects such as bio char (terra preta de indio).

Clean coal failures

While many politicians and are praising and funding "clean coal" initiatives in countries like Australia, there are no proven examples of this proposed technology actually working anywhere in the world.

Demonstration plant in Illinois cancelled

One example that was being cited - a prototype 275 megawatt power plant in Matoon, Illinios in the United States, was cancelled by the U.S. Department of Energy in February 2008. Reasons cited for the cancellation included "spiraling costs due to rising prices for concrete and steel, among other factors, and the DOE said it was pulling the plug to save money and to restructure the agency's clean coal effort to be less centralized and more effective."[3]

Clean coal project ditched in Western Australia

The Australia Federal Government’s silver bullet for dealing with climate change — the underground storage of greenhouse pollution — has been dealt a blow with the collapse in WA of a $2 billion trial of the technology. The clean coal experiment run by the resources giants Rio Tinto and BP was ditched after it was found that deep-sea storage beds off Perth would not hold the tonnes of carbon dioxide the companies wanted to bury.[4]

So it seems that "clean coal" is actually very expensive, as well as being very difficult and very risky.

See also

External links

"Australia has launched a world first experiment in storing carbon dioxide underground. However Australia's power generators warn it may not deliver the clean power that is needed in the time available."
"The evidence is mounting internationally that so called 'clean coal' will never be achieved as an economical alternative to Renewable Energy"

References

  1. Time to bury the 'clean coal' myth, guardian.co.uk, Fred Pearce, October 30 2008
  2. Green groups in carbon plan rift, Chris Hammer, The Age, April 15, 2008
  3. U.S. Cancels Clean Coal PlantScientific American, February 4, 2008
  4. WA’s $2b clean coal project ditched, southwest.thewest.com.au, May 19, 2008
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