Post-Combustion

Development and Demonstration of Waste Heat Integration with Solvent Process for More Efficient CO2 Removal
Project No.: DE-FE0007525

Southern Company Services is developing viable heat integration methods for the capture and sequestration of CO2 produced from pulverized coal (PC) combustion.  A waste heat recovery (High Efficiency System, HES) technology is being integrated into an existing 25MW pilot amine-based CO2 capture process to evaluate improvements in the energy performance of the integrated PC plant and CO2 capture process. The HES system is a heat exchanger that extracts waste heat from flue gas exiting the power plant's air-pre-heater and makes that heat available for use elsewhere in the power plant and CO2 recovery plant.

In addition, an advanced level of heat integration between the power plant and the CO2 capture facility will be demonstrated. The goals of the heat integration are:  1) provide process stream heating through the waste heat streams in order to reduce the amount of extraction steam required for sensible heat load in the solvent regeneration system, and 2) heat boiler feed-water using waste heat to reduce the extraction steam demands on the low pressure (LP) turbine, thus increasing the LP steam available for power generation or CO2 regeneration.

The project objectives include:

  • Quantifying energy efficiency improvements to the CO2 capture process when integrated with the HES and the host power plant
  • Identify and resolve operational and control problems associated with HES/capture system integration
  • Quantify tangential benefits of the HES technology to solvent-based CO2 capture technologies
  • Identify and resolve operational issues associated with employing the HES on a high-sulfur flue gas
Heat Integration of Power Plant and CCS, including HES
Heat Integration of Power Plant and CCS, including HES (click to enlarge)

Related Papers and Publications:

Contacts:

  • For further information on this project, contact the NETL Project Manager, Bruce Lani
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