Project No: FE0000489
Performer: Research Triangle Institute
Jenny B. Tennant Gasification Technology Manager National Energy Technology Laboratory 3610 Collins Ferry Road P.O. Box 880 Morgantown, WV 26507-0880 304-285-4830 firstname.lastname@example.org
K. David Lyons Project Manager National Energy Technology Laboratory 3610 Collins Ferry Road P.O. Box 880 Morgantown, WV 26507-0880 304-285-4379 email@example.com
Raghubir Gupta Principal Investigator RTI International P.O. Box 12194 Research Triangle Park, NC 27709 919-541-8023 firstname.lastname@example.org
DOE Share: $173,085,811.00
Performer Share: $6,286,657.00
Total Award Value: $179,372,468.00
Performer website: Research Triangle Institute - http://www.rti.org
Research Triangle Institute (RTI) is designing, building, and testing the Warm Temperature Desulfurization Process (WDP) at pre-commercial scale (50 megawatt electric equivalent [MWe]) to remove more than 99.9 percent of the sulfur from coal-derived synthesis gas (syngas). RTI is integrating this WDP technology with an activated methyl diethanolamine (aMDEA) solvent technology to separate 90% of the carbon dioxide (CO2) from shifted syngas. The Polk Power Station, an integrated gasification combined cycle (IGCC) power plant, will supply approximately 20% of its coal-derived syngas as a slipstream to feed into the pre-commercial scale technologies being scaled-up.
Techno-economic studies have shown that RTI's warm syngas cleanup technology, when integrated with 90 percent CO2 capture, has the potential to significantly reduce the capital and operating cost of an industrial facility. This project builds on the technical progress on the warm syngas cleaning technologies made during field testing with real syngas from Eastman Chemical Company's gasifier under DOE Contract DE-AC26-99FT40675. Successful warm gas cleanup, in combination with carbon capture and storage, will demonstrate high-purity syngas at significantly lower costs than current technologies.
Polk Power Station Unit 1
Program Background and Project Benefits
Gasification is used to convert a solid feedstock, such as coal, petcoke, or biomass, into a gaseous form, referred to as synthesis gas or syngas, which is primarily hydrogen and carbon monoxide. With gasification-based technologies, pollutants can be captured and disposed of or converted to useful products. Gasification can generate clean power by adding steam to the syngas in a water-gas-shift reactor to convert the carbon monoxide to carbon dioxide (CO2) and to produce additional hydrogen. The hydrogen and CO2 are separated—the hydrogen is used to make power and the CO2 is sent to storage, converted to useful products or used for EOR. In addition to efficiently producing electric power, a wide range of transportation fuels and chemicals can be produced from the cleaned syngas, thereby providing the flexibility needed to capitalize on the changing economic market. As a result, gasification provides a flexible technology option for using domestically available resources while meeting future environmental emission standards. Polygeneration plants that produce multiple products are uniquely possible with gasification technologies. The Gasification Systems program is developing technologies in three key areas to reduce the cost and increase the efficiency of producing syngas: (1) Feed Systems, (2) Gasifier Optimization and Plant Supporting Systems, and (3) Syngas Processing Systems. Syngas processing research and development underway emphasizes technologies that can be efficiently integrated into the plant, optimized with the temperature and pressure requirements of other systems, and meet product delivery specifications. A major cost element in gasification plants is converting raw syngas into a pure and specific gas used to create the plant's target product suite. High-hydrogen, low-methane, ultraclean syngas is versatile and can be used for power production with CO2 capture, fuels or chemicals production, and for many polygeneration applications. The technologies being developed are focused on high-efficiency processes that operate at moderate to high temperatures and clean syngas of all contaminants to the extremely low levels needed for chemical production—often significantly lower than the U.S. Environmental Protection Agency (EPA) required levels for power plants. Research Triangle Institute’s (RTI) warm syngas cleanup technology removes the most significant coal contaminants from syngas at high temperature, improving thermal and environmental performance of syngas cleanup technology. Specifically, the project consists of designing, building, and testing the High Temperature Desulfurization Process (HTDP) at pre-commercial scale (50 megawatt electric equivalent [MWe]) to remove more than 99.9 percent of the sulfur from coal-derived synthesis gas (syngas). Techno-economic studies have shown that RTI's warm syngas cleanup technology, when integrated with 90 percent CO2 capture, has the potential to significantly reduce the capital and operating cost of an IGCC plant, resulting in lower cost of electricity.
A pre-FEED, or process design package, has been developed for the high-temperature syngas cleanup units utilizing the experimental information available from bench-scale testing and the Eastman pilot plant test with real coal-derived syngas. The design basis for the Front End Engineering Design (FEED) package was finalized and the FEED design has been completed.
A Final Environmental Assessment (EA) document has been issued for this project in compliance with DOE’s National Environmental Policy Act (NEPA) implementation procedures. In conjunction with this Final EA document, DOE has issued a Finding of No Significant Impact (FONSI) for this project.