News items of interest to power industry professionals.
Basin Electric and Powerspan Corp. complete CCS feasibility study

A feasibility study for a project to add carbon capture controls at Basin Electric Power Cooperative’s 900-MW coal-fired Antelope Valley Station (AVS) in North Dakota has been completed with positive results, Basin Electric and project partner Powerspan Corp. have announced. (See the “R.E. Burger Plant” Top Plant story in POWER, October 2007, for details on the Powerspan CO2 removal technology.) The project to demonstrate the commercial viability of CO2 capture in conventional coal-fired power plants was announced earlier this year by Bismarck-based Basin Electric and Powerspan, a clean-energy technology company.

It will use a postcombustion and regenerative CO2 capture process developed by Powerspan to capture about 1 million tons, or 90%, of CO2, from a select 120-MW slipstream at AVS’s Unit 1. The captured CO2 would then be delivered by pipe to an existing compressor station at the adjacent Synfuels Plant and then injected into a 205-mile pipeline system owned by Basin Electric subsidiary Dakota Gasification Co., which is the only U.S. company that currently captures CO2 and delivers it for oil-recovery purposes to oil producers.

Basin Electric and Powerspan now plan to conduct a front-end engineering and design study. Construction of the system is scheduled to move forward late next year. The project is expected to be operational in 2012. If the project succeeds, it could be the first U.S. commercial-scale application of its kind, and one of the largest in the world, the companies said. However, the $200 million to $300 million demonstration will require federal support to ensure success, said Ron Harper, Basin Electric CEO and general manager.

“If we’re going to revolutionize the way coal is used in the future, it’s imperative that the federal government help meet this challenge and share in the risk. We’re working closely with North Dakota’s congressional delegation and Gov. Hoeven and we look forward to continued work in this arena,” Harper said. Powerspan’s ECO2 process uses an ammonia-based solution to capture flue gas CO2 as a final step, after other emissions—of sulfur dioxide, mercury, and fine particulate matter—are captured.

Once the CO2 is captured, the ammonia-based solution is regenerated to release CO2 and ammonia. The ammonia is recovered and sent back to the scrubbing process, and the CO2 is in a form that is ready for geological storage. Ammonia is not consumed in the scrubbing process, and no separate by-product is created. Unlike other carbon capture approaches, Powerspan’s uses a simpler equipment design and significantly less energy, a company statement said. The technology is suitable for retrofitting to the existing coal-based electric generating fleet as well as for new coal-fired plants.

Alstom to build major plants in Saudi Arabia, Tunisia.

In June, Alstom signed a letter of intent with Saudi Arabian utility Saudi Electricity Co. (SEC) for a $3 billion turnkey contract to build a new three-unit 1,200-MW steam power plant in Saudi Arabia. The plant will be constructed adjacent to the existing Shoaiba power station, 62 miles south of Jeddah. Upon completion, the Shoaiba power plant will comprise 14 units of 400 MW each, bringing its total output to 5,600 MW. The contract will be finalized in the coming months, Alstom said.

The agreement marks the third stage of the Shoaiba project. The previous 11 units were supplied by an Alstom-led consortium on a turnkey basis under two separate contracts won in November 1998 and January 2004 respectively. Under this contract, Alstom will design, supply, install, and commission the entire plant, including boilers, STF40 steam turbines, Gigatop 2-pole turbogenerators, seawater flue gas desulfurization systems for removal of SO2, and the complete balance- of-plant systems for the three units. Alstom’s consortium partner, Saudi Archirodon, will carry out all the associated civil work.

The boilers are designed to burn both crude and heavy fuel oil and will use Alstom’s advanced low-NOx tangential firing technology. Delivery of major equipment is scheduled in 2010. Electric power demand in Saudi Arabia is growing at around 7% each year, requiring massive investment in the country’s power generation capacity, Alstom said. In a separate statement, Alstom said in July it had won a $660 million turnkey contract fromSociété Tunisienne de
l’Electricité et du Gaz (STEG), the utility that provides about 80% of Tunisia’s power. Alstom will build a 400-MW combined- cycle power plant at Ghannouch, in the Gabes region, southern Tunisia.

An additional contract includes a 12- year operation support and maintenance agreement. Under the terms of this contract,Alstom will supply a fully integrated turnkey power plant, composed of one KA26 combined-cycle unit consisting of one GT26 gas turbine, one heat-recovery steam generator, one steam turbine, one TOPGAS turbogenerator, and the ALSPA distributed control system. Ghannouch will be the third power plant constructed by Alstom for STEG in Tunisia, after the combined-cycle power plants of Sousse and Rades, which went on-line in 1994 and 2001 respectively. Tunisia’s demand for power rises by 6% annually as a result of that country’s rapid economic development.

Alstom plans to build the new facility on the site of the old thermal power plant at Ghannouch to allow use of existing facilities such as the seawater intake and discharge structures. The company expects the plant will meet a major part of the electricity demand in the southern part of the country and maintain the equilibrium of electric power production among the regions. Mitsubishi to deliver BFG-GTCC plants in China and Korea. Mitsubishi Heavy Industries Ltd. in June received consecutive orders for blast furnace gas (BFG)–fired gas turbine combined-cycle (GTCC) power generation plants from China and Korea. The equipment for a 150-MW BFG-GTCC power plant for Qian’an Iron and Steel Works, part of the Chinese steelmaker
Shougang Group, is slated for delivery in May 2009.

The equipment for two 142-MW plants of the same kind—248 MW in total—is for POSCO Power Corp., the largest independent power producer in Korea, and is scheduled for delivery in 2009 and 2010. POSCO Power is building the power plants at Gwangyang Works of POSCO, Korea’s largest steel company, headquartered in Pohang.Foster Wheeler Spanish subsidiary wins multiple HRSG projects. Foster Wheeler Ltd. said in June that its Spanish subsidiary Foster Wheeler Energía, S.A., has been awarded three contracts for heat-recovery steam generators (HRSGs)in Portugal, Spain, and the Netherlands. The company has received a full notice to proceed on all contracts. Terms of the awards were not disclosed.

The Portuguese consortium MECISomague awarded Foster Wheeler a contract for the design and supply of two HRSGs to be coupled with General Electric’s LM-2500 combustion turbines in a cogeneration power plant that MECISomague will build at the Portucel Soporcel manufacturing complex in Setúbal, Portugal. The HRSGs are scheduled for delivery during the fourth quarter of 2008. The Spanish company CEPSA awarded Foster Wheeler a contract for the design, supply, and erection of an HRSG and auxiliary equipment, which will be integrated in a cogeneration plant to be built at the La Rábida Refinery in Huelva, Spain. The HRSG will be coupled with a General Electric 6FA gas turbine. Commercial operation is scheduled for the first quarter of
2010.

The Spanish joint venture Abener Inabensa Paises Bajos, S.A. also awarded Foster Wheeler a contract for the de-sign and supply of an HRSG and auxiliary equipment, as well as erection and commissioning advisory services. That HRSG will be integrated in a bio-ethanol plant to be built at the Rotterdam Europoort in the Netherlands. Delivery is scheduled for the second quarter of 2009.

MAN Diesel wins major plant contract in Pakistan.
German diesel engine manufacturer, MAN Diesel SE has signed a contract covering the supply of all the equipment for a second large diesel engine power station in Pakistan. The company stated that its contract with Hub Power Co., an independent power provider, is worth around $23.5 million and involves the construction on a turnkey basis of a plant that will produce over 200 MW of electrical power at Narowal in the Lahore region.

MAN Diesel’s local subsidiary in Pakistan, MAN Diesel (pvt) Ltd., will be responsible for the supply of local goods and services, the company said. The Narowal plant will by powered by 11 of the largest 18-cylinder “vee” configuration versions of the most powerful four-stroke engine in MAN Diesel’s stationary power generation program, type 48/60B. The engines will burn heavy fuel oil and will operate in a 213.6-MW diesel/combined-cycle arrangement. Heat-recovery
steam generators on each of the 11 engine-generator sets produce steam to power a single steam turbine.

The plant is due to go on-line at the end of March 2010. MAN Diesel’s first contract with a Pakistani plant, a 225-MW facility at Sheikhupura, also near Lahore, is scheduled to start a year earlier.

Leave a Reply