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- Linderholm, Carl Johan, 1976, et al.
(författare)
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Chemical-Looping Coal Combustion – Results from the ACCLAIM project
- 2014
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Ingår i: 3rd International Conference on Chemical Looping.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This work concerns the first 22 months of the 30-month ACCLAIM project. The project has involved both experimental activities in CLC pilots of 1.5 kW, 10 kW and 100 kW, as well as laboratory investigations and studies in a cold-flow model. Furthermore, investigations have been made using modelling with different approaches and with different aims.The main result of the pilot operation is that several low-cost materials should be able to improve gas conversion significantly as compared to previously tested ilmenite. Promising low cost materials include iron and manganese ores. Two manganese ores were evaluated by operation in a 10 kW CLC reactor system. These materials are called Sinfin, and Mangagran. Both materials performed well with respect to gas conversion, and oxygen demand was clearly lower as compared to ilmenite. The production rate of fines suggested an expected lifetime of around 300 h for one of the manganese materials, Sinfin, which is a distinct improvement as compared to the Buriturama ore previously tested in the 10 kW unit.Further, the fate of fuel contaminants like sulphur and nitrogen has been investigated. Models to describe fluidization and to predict conversion have been developed and are validated against operational data. Mathematical modelling and cold-flow modelling show possible ways of increasing process performance by modification of process or reactor design.A 100 kW CLC unit was operated with a mixture of ilmenite and a Brazilian manganese ore called Buritirama, which had been tested in a previous project and had been found to be much more reactive than ilmenite, although concerns had been raised regarding the attrition resistance. The mixture of ilmenite and Buritirama gave significant improvements in gas conversion in comparison to ilmenite.
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| 2. |
- Penthor, Stefan, et al.
(författare)
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The EU-FP7 Project SUCCESS - Scale-up of Oxygen Carrier for Chemical Looping Combustion using Environmentally Sustainable Materials
- 2017
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Ingår i: Energy Procedia. - : Elsevier BV. - 1876-6102. ; 114, s. 395-406
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Konferensbidrag (refereegranskat)abstract
- The paper gives a high level overview of the work performed in the EU-FP7 funded project SUCCESS (Scale-up of oxygen carrier for chemical looping combustion using environmentally sustainable materials). The project is the most recent one in a series of successful EU-funded research projects on the chemical looping combustion (CLC) technology. Its main objective is to perform the necessary research in order to demonstrate the CLC technology in the range of 10 MW fuel power input. The main focus is on scale-up of production of two different oxygen carrier materials using large scale equipment and industrially available raw materials. This will guarantee availability of oxygen carrier material at tonne scale. The scale-up of the two materials, a Cu and a Mn based, was successful and first tests with the Cu material have already been performed in four different pilot units up to 150 kW where the material showed excellent performance regarding fuel conversion. In addition to technology scale-up, extensive end-user evaluation is performed. This evaluation includes investigations on health, security and environmental impacts (HSE), a life cycle analysis and a techno-economic analysis to compare the CLC technology for steam generation against the current state-of-the-art technologies.
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