Simultaneous reduction of emissions of SO 2, NOX, and N 2O from fluidized bed combustors

Tadaaki Shimizu, Masashi Miura, Takeshi Togashi, Masaru Tonsho, Makoto Inagaki, Masahiko Matsukata

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

The effects of staged air feed and limestone feed into a bubbling fluidized bed combustor on emissions of SO 2, NOx and N 2O were investigated. The staged air feed reduced both NOx and N 2O emissions, but it inhibited SO 2 removal. NOx emission increased with increasing sulfur removal. To solve the interference problem among reduction of NOx, N 2O, and SO 2, a two-staged fluidized bed combustor was proposed, in which combustion of coal was conducted in the lower bed and SO 2 capture in the upper bed. To simulate two-staged FBC, flue gas from a circulating fluidized bed combustor was fed in to a fluidized bed reactor of limestone. NOx emission did not increase with SO 2 capture and more effective decrease in N 2O emission was achieved for the two-staged fluidized bed combustion in comparison to the conventional in-situ SO 2 capture. The results of SO 2 capture and N 2O reduction for two-staged fluidized bed were analyzed using the Kunii-Levenspiel model. A fixed bed reactor was employed to obtain kinetic data. The results of the calculations agreed fairly well with the experimental results.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Fluidized Bed Combustion
EditorsKay J. Heinschel
PublisherASME
Pages1083-1090
Number of pages8
Volume2
Publication statusPublished - 1995
Externally publishedYes
EventProceedings of the 13th International Conference on Fluidized Bed Combustion. Part 2 (of 2) - Orlando, FL, USA
Duration: 1995 May 71995 May 10

Other

OtherProceedings of the 13th International Conference on Fluidized Bed Combustion. Part 2 (of 2)
CityOrlando, FL, USA
Period95/5/795/5/10

Fingerprint

Fluidized bed combustors
Limestone
Fluidized beds
Fluidized bed combustion
Desulfurization
Air
Flue gases
Coal
Kinetics

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Shimizu, T., Miura, M., Togashi, T., Tonsho, M., Inagaki, M., & Matsukata, M. (1995). Simultaneous reduction of emissions of SO 2, NOX, and N 2O from fluidized bed combustors In K. J. Heinschel (Ed.), Proceedings of the International Conference on Fluidized Bed Combustion (Vol. 2, pp. 1083-1090). ASME.

Simultaneous reduction of emissions of SO 2, NOX, and N 2O from fluidized bed combustors . / Shimizu, Tadaaki; Miura, Masashi; Togashi, Takeshi; Tonsho, Masaru; Inagaki, Makoto; Matsukata, Masahiko.

Proceedings of the International Conference on Fluidized Bed Combustion. ed. / Kay J. Heinschel. Vol. 2 ASME, 1995. p. 1083-1090.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Shimizu, T, Miura, M, Togashi, T, Tonsho, M, Inagaki, M & Matsukata, M 1995, Simultaneous reduction of emissions of SO 2, NOX, and N 2O from fluidized bed combustors in KJ Heinschel (ed.), Proceedings of the International Conference on Fluidized Bed Combustion. vol. 2, ASME, pp. 1083-1090, Proceedings of the 13th International Conference on Fluidized Bed Combustion. Part 2 (of 2), Orlando, FL, USA, 95/5/7.
Shimizu T, Miura M, Togashi T, Tonsho M, Inagaki M, Matsukata M. Simultaneous reduction of emissions of SO 2, NOX, and N 2O from fluidized bed combustors In Heinschel KJ, editor, Proceedings of the International Conference on Fluidized Bed Combustion. Vol. 2. ASME. 1995. p. 1083-1090
Shimizu, Tadaaki ; Miura, Masashi ; Togashi, Takeshi ; Tonsho, Masaru ; Inagaki, Makoto ; Matsukata, Masahiko. / Simultaneous reduction of emissions of SO 2, NOX, and N 2O from fluidized bed combustors Proceedings of the International Conference on Fluidized Bed Combustion. editor / Kay J. Heinschel. Vol. 2 ASME, 1995. pp. 1083-1090
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