It is anticipated the power plant will be supplied with coal from the neighbouring mine owned by Hatfield Colliery Ltd. The coal would be pulverised and then gasified to form a mixture of hydrogen-rich gas and carbon monoxide. This mixture will then be saturated with steam that creates more hydrogen and converts the carbon monoxide to CO2. The gas stream will then be cleaned to remove contaminants such as sulphur and the CO2 and hydrogen-rich gas will be separated.
Due to both commercial and technical reasons the CO2 is removed form the natural gas, just like Sleipner. An amine process is used for the capture. Starting from 2004, 1.2 million tonnes CO2 per year is being captured and stored at In Salah.
The CO2 is stored in the same layer as the natural gas, but at a safe distance. The same cap rock that keeps the natural gas in place will keep the CO2 safely stored.
The Rangely Oil Field, located in northwestern Colorado, is one of the oldest and largest oil fields in the Rocky Mountain region. Since the 1940s, when large-scale development began, this field has produced nearly 800 million barrels of oil. ChevronTexaco, the current owner/operator of the Rangely Weber Sand Unit, has been injecting carbon dioxide into this reservoir since 1986 to increase the total volume of recoverable crude oil.
Anadarko’s enhanced oil recovery (EOR) operations in the Salt Creek field of Wyoming utilize CO2 to stimulate oil production from a 100-year-old field. The CO2 injected into the ground enhances domestic oil production and prevents a greenhouse gas from being emitted into the atmosphere. As a benefit of our EOR operations, the Salt Creek field is one of the largest CO2 oil recovery and geological-sequestration projects of its kind in North America. The project currently sequesters enough CO2 each day to offset the equivalent emissions of more than half a million cars.
Every year since 1996, they have captured one million tonnes of carbon dioxide from natural gas production at Sleipner West and stored it in an aquifer more than 800 metres below the seabed. On Sleipner, carbon dioxide is captured using a conventional amine process and stored in geological layers.
Instead of emitting the carbon dioxide (CO2) resulting from the well stream that comes from the Snøhvit field to the air, the CO2 is reinjected into the ground and stored in a formation which lies somewhat beneath the gas-bearing formations on the Snøhvit field.
In 1998, Petro Source Carbon Company, a predecessor to Blue Source, entered a partnership with MCNIC and an affiliate of BP to construct an 82 mile, 10-inch CO2 pipeline in West Texas known as the Val Verde Pipeline. The pipeline enables the capture of CO2 from five natural gas processing plants, avoiding CO2 venting to the atmosphere.
The Weyburn CO2 enhanced oil recovery (CO2-EOR) project began operation in 2000. The CO2, a by-product from the Dakota Gasification Company’s Synfuels Plant at Beulah, North Dakota, is delivered via a 323-km pipeline to Cenovus’ Weyburn field. By injecting approximately 6,500 tonnes per day (125 MMscf/d) of CO2 (resulting in the storage of 2.4 million tonnes of CO2 per year), Cenovus has boosted oil production to about 28,000 barrels of oil per day - a 180 percent increase. Since the start-up of the CO2 flood, more than 17 million tonnes of CO2 have been safely stored at Weyburn. It is projected that a total of approximately 30 million tonnes of CO2 will be stored over the life of the EOR project. Once the project is complete, the infrastructure may be used exclusively for CO2 storage, providing an additional 25 million tonnes of capacity.
Using the same CO2 supply source as EnCana, Apache began injecting CO2 in the neighbouring Midale field in 2005. Incremental oil production is on the order of 6,500 barrels per day as the result of injecting 1,300 tonnes of CO2 per day (25 MMscf/d), or close to 0.5 million tonnes per year. About 2 million tonnes of CO2 have been stored at Midale as of January 1, 2010, and more than 10 million tonnes are expected be stored over the 30-year life of this EOR project.