Beijing Guoneng Yinghui Clean Energy Engineering Co., Ltd. (Beijing Guoneng) has awarded KBR a contract to provide licensing, engineering services and proprietary equipment for the implementation of KBR’s and Southern Company’s Transport Integrated Gasification technology (TRIG) at a power plant operated by Dongguan Tianming Electric Power Co., Ltd. (Dongguan TMEP) in Guandong Province, Peoples Republic of China.
The contract award marks China as the site for the first worldwide commercial implementation of the TRIG technology with the goal of producing low-emission, coal-based electricity. TRIG coal gasification technology was co-developed developed by Southern Company, KBR Inc., and others including the US Department of Energy (DOE), at the DOE’s research facility in Wilsonville, Ala., that is managed and operated by Southern Company.
|IGCC plants use two power cycles, extracting more electricity from a tonne of coal.|
|Syngas produced by coal gasification is used to generate electricity in a gas turbine. The exhaust gas from the turbine is the used to heat water, producing steam to generate additional electricity from a steam turbine.|
|Source: NETL. Click to enlarge.|
At the Dongguan TMEP facility, TRIG technology will be added to an existing gas turbine combined cycle plant so that it can use synthetic gas from coal as its fuel for generating electricity, rather than fuel oil.
The 120-megawatt Dongguan TMEP plant, expected to begin operation in 2011, would demonstrate an example of advanced US IGCC (integrated gasification combined cycle) technology that is being developed in partnership between the DOE and industry. This IGCC technology is compatible with carbon capture, and its deployment in China is a step toward positioning IGCC for future integration with carbon capture technology.
Southern Company subsidiary Mississippi Power currently is seeking regulatory approval to build a 582-megawatt plant using TRIG technology in Kemper County, Miss. That plant would include 65% carbon capture and sequestration.
TRIG. TRIG is an advanced gasification process technology that enables the economic utilization of inexpensive, low grade feedstock such as lignite coal, sub-bituminous coal, and high ash coal. These coal reserves might otherwise remain uneconomical sources due to high moisture and ash contents.
|TRIG gasifier. Click to enlarge.|
The TRIG gasifier, derived from KBR’s fluid catalytic cracking (FCC) process, is an advanced pressurized circulating fluidized bed gasifier that operates at moderate temperatures (1,500 – 1,950 °F). TRIG is designed to operate at high solids circulation rates and gas velocities, resulting in higher throughput, carbon conversion and efficiency.
Low-rank coals—which typically have high ash and/or moisture content—account for roughly half of the worldwide coal assets. Since the gasifier uses a dry feed and does not melt the ash in the feedstock, it is particularly well-suited for these lower-cost feedstocks. Unlike other gasifiers, TRIG process technology was developed for both IGCC (Integrated Gasification Combined Cycle) power generation and chemicals/ fuels production.
For power generation, the system will be configured using a cost-efficient air-blown design that eliminates oxygen plant; however, it operates equally well in the oxygen-blown mode for chemicals and fuels production and polygeneration applications.
KBR has also developed proprietary process schemes to convert syngas to ammonia, methanol, substitute natural gas (SNG), and Fischer-Tropsch derived transportation fuels.
The 120MW Dongguan IGCC Power Plant is the first phase of the total 920MW Sun State IGCC Power Project developed by Beijing Guoneng. The second phase will be an 800MW IGCC Power Plant, estimated to be completed by 2012.