Focus on Coal
Así como la Asociación Mundial del Carbón (WCA) celebra el papel vital del carbón en el suministro de electricidad, los que la generan están invirtiendo en tecnologías de generación limpias necesarias para impulsar su uso. Informa Sean Ottewell.
Die World Coal Association (WCA) betont die entscheidende Rolle der Kohle für die Elektrizitätsversorgung, und Stromerzeuger investieren in die sauberen Technologien, die erforderlich sind, um ihre Nutzung zu fördern. Sean Ottewell berichtet.
Investment urged for clean coal technologies
As the World Coal Association (WCA) hails coal’s vital role in electricity supply, generators are investing in the clean generation technologies needed to boost its use. Sean Ottewell reports.
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An SST5-6000 steam turbine set ready for use at the Balkhash coal-fi red power plant in Kazakhstan.
he World Coal Association (WCA) has called for greater investment in cleaner coal technologies, both in order to meet growing global
energy demand and to reduce carbon dioxide emissions. T e London-based organisation points out that coal plays a vital role in society by providing over 40% of global electricity, and as an indispensable ingredient in modern infrastructure. Here it cites the International Energy Agency’s forecasts that coal use is set to grow by around 17% in the next 20 years. T e WCA highlights technologies such as high effi ciency, low emissions (HELE) coal plants and carbon capture, use and storage (CCUS) schemes, as being able to make a signifi cant contribution to reducing global carbon dioxide emissions as part of the energy mix. Benjamin Sporton, WCA’s acting chief
executive, stated: “T e WCA recognises the vital role that all low emission technologies can play and has created a global Platform for Accelerating Coal
Effi ciency (PACE) to promote adoption of these technologies. PACE’s vision is for the most effi cient power plant technology possible to be deployed when coal plants are built.” PACE’s objective is to raise the global
average effi ciency of coal-fi red power plants and so minimise carbon dioxide emissions, whilst maintaining legitimate economic development and poverty alleviation eff orts. “Calls for divestment ignore the global
role played by coal and the potential off ered by HELE and CCUS technologies. We cannot meet our energy needs, tackle energy poverty and reduce global emissions without utilising all options available to us, including low emissions coal,” he added. One such option is being utilised by Alstom and Veolia. T ey have signed a turnkey contract for the construction of a Flue Gas Desulphurisation (FGD) plant to treat fl ue gases from fi ve steam boilers at Veolia Energia Lodz’s combined heat and power plant in Poland. Due for commissioning in 2017, the FGD plant will use Alstom’s NID technology. A typical NID set-up comprises a hydrator/mixer, J-duct reactor and typically a fabric fi lter – although it can be used with electrostatic precipitators as well. In the J-duct reactor, acid gases such as sulphur oxides, hydrogen chloride and hydrogen fl uoride react with hydrated lime, produced on-line from quick lime. Once bound to the particulate matter, the gaseous pollutants are removed from the fl ue gas in a downstream particulate collection device. To further enhance mercury collection, powdered activated carbon (PAC) can be injected. T e collected particles are recycled to the mixer where freshly produced hydrated lime and water are added to the process. T is order comes almost one year after Veolia and Alstom signed a contract for
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