Moving to Advanced Supercritical Plant & Capture-Ready Measures

1. Moving to Advanced Supercritical Plant & Capture-Ready Measures Dr P. Mahi; P. Napier-Moore Mott MacDonald

2. Advanced Supercritical Plants

3. Advanced Supercritical Plants (500 MW)

4. Advanced Supercritical Plants (500 MW)

5. Supercritical Plants Last 10 Years Total

6. Advanced Supercritical

7. Advanced Supercritical Plants – Costs O&M Costs - Similar - In India; likely to be higher

8. Implementation Issues • Technology Issues • waterwall craking • negative flow characteristic • slagging • Availability of skilled operating staff • Coal quality and boiler performance • Environmental benefits • Socio-economic benefits

9. Incentives • Carbon related revenue can make a substantial difference to the economics of supercritical plants and most notably to the economics of advanced supercritical units • Key issue is carbon price risk after 2012.

10. Post Combustion Capture-ReadyEssential Measures – focussed on Plant Site Essential measures, focussed on the plant site, include: • Land area and layout able to accommodate: – the capture equipment, new pipelines, expanded utilities and additional generation units • Provisions for new pipework in the Water-Steam-Condensate cycle – allowing for heat integration • Design of the steam cycle to be compatible with the likely steam extraction requirements of the capture unit • inclusion of off-take tee at IP/LP crossover pipe, with target crossover pressure of e.g. 3-4 bar(a) for amines • Allow space for addition/upgrade of FGD, to meet flue gas purity requirements, as applicable, of CO2 capture • Route to CO2 storage that is economically competitive on a global stage (€/tCO2 basis)

11. Post Combustion Capture-ReadyOptional Measures – Up to CO2 Storage • Optional measures – first tier • Identification of potential sequestration sites and preliminary geological investigations to screen these. • Pipeline route determined, where CO2 exported by pipeline rather than ship. • Installation of FGD that can readily be upgraded to meet flue gas purity required • Optional measures – second tier • Sequestration site test wells, integrity studies, access rights and permitting • Pipeline route land ownership, way leaves and permitting of CO2 transportation • Increase on-site utility capacity – including compressed air, cooling water treatment and electrical distribution. • Pre-investment in up-rated base plant e.g. FGD, ID fans

12. Capture-Ready PlantKey Issues • Capital cost impact within power plant relatively low • Need for consideration of CCS in national-level generation planning & site selection • Need for review of planning and regulatory barriers for CO2 transport and storage chain? • Potentially on critical path to retrofit • Possible need for outside support with capture-ready design to mitigate risk of delays to design process, while still ensuring that barriers to CCS are removed • Mott MacDonald’s current studies of advanced supercritical plant and capture-ready plant will provide analysis tailored to India – for the UMPPs

13. www.mottmac.com