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  1. WSP in Africa
  2. Insights
  3. Mining for coal still has its place

Mining for coal still has a place in the power mix

During the recent Investing in African Mining Indaba, concerns were noted on the impact that the move towards a ‘greener economy’ would have on coal mining – and, for base-load power production. However, coal mining and power production will remain two key industrial activities in the local economy.

map marker South Africa | Wednesday, 13 February 2019
Reading Time : 2.5 minutes

An optimal energy mix – for any country - relies on a variety of generation technologies. In South Africa there is certainly a drive towards alternative and ‘greener’ sources, like gas or renewables, which all form part of the country’s Integrated Resource Plan (IRP) – and are in line with the country’s carbon reduction target commitments. That being said, South Africa - with its vast coal resources and large fleet of power stations – is still setting the benchmark on the continent in terms of coal-fired power generation. Where there is perhaps more pressure on adopting interventions and new approaches to ensure that coal can be mined and combusted for power generation in the most eco-efficient way possible. 

Shifting the balance in state vs. investor priorities

As much of the developed world has or is in the process of moving away from coal base-load power, this has made it more challenging to secure financing for such projects. However, there is significant investor and developer interest in the country’s alternative and renewable power plans and projects. The focus therefore should be on continuing to open opportunities for investment and development through the Renewable Energy Independent Power Producer programme (REIPPP) and gas-to-power programme, where the state’s available funds for power re-investment may be focused on maintaining and re-investing in cleaner coal base-load power infrastructure, for example.  

Innovating to support more sustainable coal base-load power

While there are several simultaneous conversations around the REIPPP, the gas-to-power programme, coal base-load IPP programme – even the future of the proposed nuclear programme – amongst this mix the importance of the coal base-load power programme should not be underrated. 

The fact is that even with the new builds of Medupi and Kusile, there is still a need to replace the aging fleet of existing coal-fired power plants that were built in South Africa in the 1980s. With this in mind and based on our experience, meeting the onerous environmental demands on these plants promises to add the most value to South Africa’s coal generation aspirations.

For example, Medupi and Kusile feature super-critical boilers and turbines that improve their efficiencies and use of coal and scares water resources. Meanwhile, flue-gas desulphurisation technology, which will be retro-fitted on all six of Medupi’s generation units, will significantly reduce their sulphur-dioxide emissions.

Additionally, ongoing research into cleaner technologies – including, coal-gasification, carbon sequestration and storage and fluidised-bed technology – all point to cleaner coal solutions for South Africa’s future; which is in keeping with the country’s carbon emission reduction target commitments. 

As demand for power rises the South African government, like its counterparts in developed and emerging economies, is faced with the trilemma of providing affordable, decarbonised and secure electricity. Coal will therefore undoubtedly remain part of the country’s base-load generation plans for the foreseeable future. But, we can adapt the way we mine, produce and process it – towards reducing carbon emissions and to transition to more futureproofed and sustainable energy schemes. 


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Author

Wayne Lindecke
Technical Director, Power
South Africa

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