A review.As part of the EU project CASTOR, a 1 t/h CO₂ absorption pilot plant has been erected at Esbjergvaerket (Esbjerg power station) in Denmark.The main purpose of the pilot plant is to demonstrate the post combustion capture technol. in conjunction with a coal-fired power station.Addnl., the pilot plant has been used to test the performance of new energy efficient solvents and to validate modeling work.The pilot plant operates on a slipstream of flue gas from the power plant without any further pre-treatment.During the CASTOR project, four 1000 h test campaigns have been conducted at the facility using conventional solvent, 30% weight MEA as well as two novel amine-based solvents, CASTOR 1 and CASTOR 2.Among others, the test campaigns consisted of parameter variation tests and longer periods of continuous operation.This paper summarizes the operation experience and some of the results obtained during the CASTOR project.

International Technical Conference on Clean Coal and Fuel Systems

Biomass for power production in Denmark

Author: Sander, Bo

A review.When the interest in biomass-based power production began to emerge in Denmark 15-20 years ago, it became clear that international experience was limited and only included the use of wood as fuel.To meet the targets for straw-based power production a development and demonstration program was initiated primarily focusing on straw power plant technol.As straw is a difficult fuel to use for power production, a broad range of tech. questions had to be studied: reliable systems for handling of straw bales and feeding of straw to the boiler, combustion properties, boiler design, slagging and fouling, corrosion of superheaters, low temperature corrosion, deactivation and plugging of SCR catalysts, ash chem. and formation of submicron particles, emissions, flue gas cleaning, use of residues, working environment, etc.Increased knowledge on how to use straw and wood in power plants were achieved, and today around 1,400,000 tons of biomass are applied annually in Denmark for power production using four technologies: grate firing of straw and wood chips (12 plants, 4 central, 8 local), co-firing of straw in coal-fired power plants (2 plants), biodust firing: co-firing of wood pellets, gas and oil (1 plant), CFB combustion of straw and coal (1 plant), in grate-fired boilers the challenges of fouling and corrosion in superheaters were met by a superheater design that allows build-up of thick deposits of straw ash.The steam temperature is limited to 540° due to the chloride-containing deposits that are formed.Co-firing of straw in coal fired plants the coal ash efficiently reduces the chloride content in the superheater deposits and the risk of corrosion is significantly reduced.This paper also addresses new initiatives in the use of manure fibers and SRF as energy sources for power plants.

VGB Technische Vereinigung der Grosskraftwerksbetreiber, [Tagungsbericht] VGB-TB

First year operational experience with a 1 t/h CO₂ absorption pilot plant at Esbjerg coal-fired power plant

Author: Vilhelmsen, P.-J. ; Jensen, J. N. ; Knudsen, J. N. ; Biede, O.

As a part of the EU integrated project CASTOR a 1 t/h CO₂ absorption pilot plant has been erected at the 400 MW coal-fired Esbjerg power plant - operated by Dong Energy, Denmark.The main purpose of the pilot plant is to demonstrate the post combustion capture technol. in conjunction with a coal-fired power plant.Addnl., the pilot plant will be used to test the performance of new energy efficient solvents and to verify modeling work.In Jan.-Feb. 2006, a 1000 h test campaign on MEA was conducted at the pilot plant.This paper summarises the initial operation experience and some of the first results obtained during this campaign.

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