Reactions during the calcination of a limestone under different atmospheres at fluidized bed combustion conditions: A fixed bed reactor study
- Univ. of Goeteborg and Chalmers Univ. of Technology, Goeteborg (Sweden). Dept. of Inorganic Chemistry
Calcined limestones have been shown to provide surfaces in a boiler that have importance for heterogeneous reactions such as the direct decomposition of NH{sub 3} to N{sub 2}, and NO reduction by CO and H{sub 2}. When calcination takes place under an NH{sub 3} atmosphere, formation of HCN and HCNO has also been observed. This work concerns a comparison of the calcination process of a natural limestone under NO or NH{sub 3} atmospheres and the influence of the presence of CO, O{sub 2} and SO{sub 2} on the calcination behavior. Results indicate not fully oxidized phases or impurities to be responsible for the NO reduction during calcination. The results for the HCN and HNCO formation are not that conclusive, although steady state experiments over calcined limestone surfaces in a NH{sub 3} and CO, or CO{sub 2} atmosphere reveal a lot of information such as the importance of CO{sub 2} in the HNCO formation.
- OSTI ID:
- 355841
- Report Number(s):
- CONF-9705116-; ISBN 0-7918-1557-9; TRN: IM9931%%362
- Resource Relation:
- Conference: 14. international conference on fluidized bed combustion, Vancouver (Canada), 11-16 May 1997; Other Information: PBD: 1997; Related Information: Is Part Of Proceedings of the 14. international conference on fluidized bed combustion: Volume 1; Preto, F.D.S. [ed.] [Canada Centre for Mineral and Energy Technology, Ottawa, Ontario (Canada). Energy Technology Centre]; PB: 666 p.
- Country of Publication:
- United States
- Language:
- English
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