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The combustion of pulverised coal in the furnace of a coal fired power station boiler results in the production of a number of solid by-products, more accurately classified as CCP's (coal combustion products). This terminology reflects a more positive view and is in keeping with the concept of industrial ecology, being an approach that seeks to use one industries by-product output as another industries raw material inputs.

The beneficial use of CCP's from coal consumption is an important for the sustainable use of coal, within an increasingly resource finite and carbon emission constrained society. While the principal output from coal combustion is energy, significant quantities of by-products in the form of CCP's are also produced. In life cycle terms, the opportunities to exploit the low energy embodied in CCP's such as fly ash, furnace bottom ash, boiler slags and cenospheres are extensive.

CCP's, being highly processed materials (from the actions of milling and thermal processing) can, if used effectively, displace the use of other energy-intensive raw materials (product replacement). This results in the conservation of finite mineral resources and the reduction or displacement of emissions, through the recovery and reuse of CCPs. An example is shown below; note that percentages are not exact.

    

Cement that includes CCPs such as fly ash can create a reduction of finite resourches such as limestone and clay by up to 30% (Coal Combustion Products Handbook 2nd Edition).

Reduction (in greenhouse gas terms) is therefore tangible and within an increasingly carbon constrained society is a worthy motivation for developing innovative methods for recovery and use. Based on current national government policy and growing public concern for carbon dioxide and methane reduction, it appears inevitable that a carbon pricing mechanism will re-emerge, and that it will include a suite of offset options that recognise reductions in the use of fossil fuels. This has and will bring further incentive to recover and utilise CCP's now and in the future.

Australian producers and marketers of power station ash formed the Ash Development Association of Australia (ADAA) with the objective of investigating and developing market opportunities for the use of these materials in various industry applications such as construction, agriculture and manufacturing. The Association has and continues to deliver on this objective by striving to increase awareness to generators, processors, regulators and end users of the benefits to both the environment and their organisations that arise from the increased utilisation of these industry by/co-products for relevant industries, the community, and ultimately the environment.

Strategically, this has involved the execution of three primary objectives:

  • The initiation, analysis and dissemination of fundamental (pre-commercial) research and development initiatives in the recovery, processing and use of CCP's.
  • Advocating for the potential beneficial end uses and applications of CCP's to governments, regulators, and relevant industry organisations, both domestically and internationally.
  • Providing a regular forum for the exchange, consultation and analysis of relevant industry developments and information.

News Updates

Austroads Bridge Conference 2017

16-03-2017

Austroads Bridge Conference 2017 (ABC2017), a national conference that will be hosted by VicRoads in April 2017. This will be the 10th conference held under the auspices of Austroads, the 25th anniversary of the first ABC and the second time hosted by VicRoads.

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Australian Standards Updates: February 2017

27-02-2017

 

Standards Australia has notified the Association of the the following amendments were published on the 27th February 2017. 

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New Generation Coal Plant Proposal

27-02-2017

The new-generation, high-efficiency coal plants produce half the carbon dioxide emissions of existing ones, making them comparable with gas and the Minerals Council says it is “simply common sense” that new coal technologies be considered as part of Australia’s efforts to meet its emissions reduction targets.

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CCGP Journal - Submit your papers now!

26-02-2017

The Coal Combustion & Gasification Products Journal is a collaboration between the American Coal Ash Association and the University of Kentucky Center for Applied Energy Research, with the Ash Development Association of Australia's CEO, Craig Heidrich on the Editorial Board.

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