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Performer:  Altex Technologies Corporation Location:  Sunnyvale, California
Project Duration:  06/08/2015 – 07/31/2018 Award Number:  SC0013823
Technology Area:  Post-Combustion Capture Total Award Value:  $1,149,974
Key Technology:  Novel Concepts DOE Share:  $1,149,974
Performer Share:  $0

Molecular basket sorbent concept for CO<sub>2</sub> capture
Molecular basket sorbent concept for CO2 capture

Project Description

Altex Technologies Corporation, in partnership with the College of Earth and Mineral Sciences (EMS) Energy Institute at the Pennsylvania State University (PSU), is continuing development of an innovative carbon dioxide (CO2) capture process, the integrated temperature and pressure swing (ITAPS), for integrated gasification combined cycle (IGCC) plants. An IGCC plant combines modern coal gasification technology with both gas turbine and steam turbine power generation. The innovative ITAPS process and novel, low-cost component designs reduce the capital cost of the carbon capture system and reduce water usage by providing an effective means of dry cooling the steam-turbine exhaust. The ITAPS system is designed to be integrated with the steam condenser in an IGCC power plant, in which steam turbine exhaust is used to regenerate and produce CO2 from one ITAPS reactor, while a second ITAPS reactor captures CO2. In Phase I of this Small Business Innovation Research project, a bench-scale ITAPS unit was constructed utilizing Altex’s highly effective, low-cost microchannel heat exchangers coated with molecular-basket sorbents previously developed and optimized by PSU’s EMS Energy Institute. Testing of a monolith element exhibited three times better capacity than a packed bed for the capture and release of CO2; absorption and desorption cycle testing indicated the feasibility of applying the operational characteristics to similar cycles in a power plant; and an economic analysis of the process concluded that the increase in the cost of electricity was minimal. Under Phase II, a prototype process simulating a portion of the power plant will be designed, including fabrication of a prototype reactor. Testing will include the CO2 capture and release cycle on one side, and the transferring of the needed- and released-heat to the power plant simulated stream on the other side. The results will be used to update the techno-economic analysis.

Project Benefits

Enabling the production of ITAPS reactors at low cost and integrating a carbon capture system with existing unit operations reduces the capital and operating costs for CO2 capture from coal-fired power plants.

Presentations, Papers, and Publications

Contact Information

Federal Project Manager Steven Mascaro:
Technology Manager Lynn Brickett:
Principal Investigator Alex Kelly: