Features. Plant Design: Accelerating the deployment of cleaner coal plants

Power,  Feb 2008  by Parkes, Jack,  Holt, Neville,  Phillips, Jeffrey,  Institute, Electric Power Research

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As a sponsor of a CoalFleet EDP, Duke Energy has been able to use the face=+Bold; UDBSface=-Bold; and the permitting guidelines to gain insight into several areas of plant design and permitting. They include the possible application of selective catalytic reduction (SCR) for additional NOface=+Subscript; xface=-Subscript; control, and engineering assessments of future options that include various levels of COface=+Subscript; 2 face=-Subscript; capture. These documents have helped Duke develop a design that will achieve very low emission levels and support the air permit application process. Duke also has gained an understanding of the technical requirements for the sulfur market that were incorporated into the design of the plant's sulfur recovery system.

The utility also worked with CoalFleet IGCC experts to understand the issues involved in potentially retrofitting COface=+Subscript; 2face=-Subscript; capture into the plant design at a later date. For example, Duke identified several options for various levels of COface=+Subscript; 2 face=-Subscript; capture that could be implemented at lower cost, compared to other IGCC and PC designs.

Finally, information from permitting guidelines and CoalFleet meetings was used by Duke in its discussions with the permitting agency on technical issues affecting IGCC design and emissions. Among the subjects discussed were the feasibility of applying SCR technology to IGCC, start-up and shutdown emissions levels, and the applicability of EPA guidelines and regulations to coal-fired IGCC plant operations, as opposed to those of natural gas-fired combined-cycle plants.

In return for those tangible and intangible benefits, Duke provided valuable support to the CoalFleet program. Duke representatives maintained an open dialogue with EPRI's IGCC experts and other members of the IGCC Design Guidelines working group and provided significant input to the face=+Bold; UDBS. face=-Bold; Finally, as a designated EDP, Duke will help develop a CoalFleet pre-design specification that will contain a nonproprietary description of the Edwardsport design that other CoalFleet members can use as a reference when deciding which 'standard IGCC' they would like to adopt for their own project.

--face=+Bold; Jack Parkesface=-Bold; (jparkes@epri.com) is the senior manager of EPRI's Advanced Coal Generation program. face=+Bold; Neville Holtface=-Bold; (nholt@epri.com) is a technical fellow with the program, and face=+Bold; Jeffrey Phillipsface=-Bold; (jphillip@epri.com) is one of its managers.

Copyright TradeFair Group Publications Ltd Feb 2008
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