TPW

R/CA

SE/A

BSF/

EN/1

0.20

14/G

BR/2

450

CAPTION_WHITE_lore_ipsum_(Optional)

ALSTOM 2014. All rights reserved. Information contained in this document is indicative only. No representation or warranty is given or should be relied on that it is complete or correct or will apply to any particular project. This will depend on the technical and commercial circumstances. It is provided without liability and is subject to change without notice. Reproduction, use or disclosure to third parties, without express written authority, is strictly prohibited. Alstom contributes to the protection of the environment. This leaflet is printed on environmentally-friendly paper.

CCS SOLUTIONS Partnershipsand references

CASE STUDY: CCS SOLUTIONS

Alstom Boiler Simulation FacilityWindsor, USA

Oxy-combustionCO2 capture

90% of all CO2 capturedLOWERINGENVIRONMENTAL FOOTPRINT

Alstom has pioneered research and development into oxy-combustion CO2 capture technology where fossil fuels are combusted in a mixture of oxygen and re-circulated flue gas to produce a flue gas rich in CO2 and free of the nitrogen found in conventional air-fired fossil-fuel power plants.

Since 2008, Alstoms research and development facility in Windsor, Connecticut, USA has been conducting comprehensive technology development and verification in conjunction with the U.S Department of Energy, two state coal development offices and ten electric utility customers. The process has featured Alstoms purpose-designed, tangentially fired 15 MW pilot plant which included the full oxy-combustion process from oxygen supply to boiler/firing system, as well as air quality control systems and gas processing to produce high quality supercritical CO2 product. The plant has been employed to study the effect of oxy-combustion on different types of coal as well as evaluating the optimal design of the boiler under different operating conditions while collecting data on combustion, heat transfer, gas recycle rate, deposition and corrosion.

Very good combustion performance could be achieved with all the test coals evaluated and the plant was operated efficiently under staged combustion conditions with less than 2% oxygen in the flue gas and still achieved low CO and low unburned carbon. In addition, the concentration of pollutants such as NOx, SO2, SO3 and Hg were controlled to target levels through a combination of primary and secondary measures and through an Alstom gas processing pilot unit.

The pilot programme, which ended in April 2014, has produced a wealth of detailed information on the potential design and performance of full-sized plants. The results demonstrate that there are no technical barriers restricting the continued development and commercialisation of oxy-combustion technology for CO2 capture.

Location: .............................. Windsor, Connecticut, USAProcess / fuel: ..................... Bituminous, Sub-Bituminous, and Lignite coalCapture technology: ............ Oxy-combustionCompletion of testing: ......... April 2014