Optimizing the Costs of Solid Sorbent-Based CO2 Capture Process through Heat Integration
Project No.: DE-FE0012914

ADA-ES is conducting bench scale testing and computer modeling of select concepts to address the technology gap of a cross heat exchanger for solids. Processes that depend chiefly on temperature-swing adsorption are the most advantageous for post-combustion carbon capture applications. Solid-based post-combustion carbon capture processes that do not rely on heat integration can be cost-competitive with aqueous amines, but there are ways to reduce both parasitic energy demands and costs. For instance, a cross heat exchanger can be used to recover sensible heat from the sorbent exiting the regenerator and add it to the sorbent entering the regenerator. Such cross heat exchangers, however, do not exist on a scale large enough to accommodate the solids that this application deals with. Developing a process model to evaluate heat exchanger options for a solid-based process is a key component of this research. Availability of the model provides the opportunity to evaluate other options for heat integration and energy savings during project execution. For example: using heat from the CO2 compressors to supplement the regeneration energy requirement, reducing the moisture content of the flue gas to lower heat loss from the latent heat of water vaporization, and reducing system pressure drop.

Potential moving bed solids heat exchanger design to be evaluated
Potential moving bed solids heat exchanger design to be evaluated

Related Papers and Publications:


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