Coal Based Oxy-Combustion for Carbon Caputure and Storage Lecture
May 28 @ 3:30 PM - 4:30 PM - Stewart Center, Rm. 318
Coal based oxy-combustion for carbon capture and storage: status,
prospects, research needs and roadmap to commercialization
Professor Terry Wall
Project Leader, APP Oxy-fuel Working Group and Chemical Engineering,
University of Newcastle, Callaghan, NSW 2308, Australia
Conventional pf coal-fired boilers use air for combustion in which the
nitrogen from the air dilutes the CO2 concentration in the flue gas.
During oxy-combustion, a combination of oxygen (typically of greater
than 95% purity) and recycled flue gas is used for combustion of the
fuel. A flue gas with a concentration of CO2 ready for sequestration
is generated, with the recycled flue gas used to control flame
temperature and make up some of the missing N2 to ensure there is
enough gas to carry the heat through the boiler.
As one of the three major carbon capture and storage (CCS)
technologies, oxy-fuel technology is currently undergoing rapid
development with a number of demonstration projects commencing in the
development towards commercialization.
The presentation provides a comprehensive overview of current and
projected pilot plants and demonstration projects being progressed in
the US, EU, Asia and Australia. Current research on coal
combustibility, furnace heat transfer, and emissions is also detailed,
with an emphasis on the difference between air-firing and oxy-fuel.
Aspects of a roadmap for the future deployment of oxy-fuel CCS
technology for commercialization are provided, together with details
of emerging regulations in for CCS which influence the required CO2
gas quality from oxy-fuel.
- Wendy Madore