Interaction among emission gases evolved at stationary and transient stage in wakamatsu 71 MWe PFBC demonstration plant

Rikiya Abe, Hiroshi Sasatsu, Tatsuro Harada, Nobuhiro Misawa, Ichirou Saitou

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Abstract

SYNOPSIS : - Emissions of NO, N 2O, CO 2 and CO in the flue gas from 71 MW PFBC demonstration plant were measured during stationary combustion tests conducted from January to December in 1997. An index of emission gas partial pressure, {p NO/p SO2 · (p CO/P NO) 2] named as ASH TR - SN, was introduced and plotted against the reverse of the average cyclone temperature (T c ). A linear correlation of Van't Hoff law was found with high correlation factor of 90.17 % as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2= exp (47.3 × 10 3/T c-50.4) Also those emissions were measured every five minutes for eight days during a combustion test conducted from November 19 to 26 in 1997. The same index of ASH TR - SN at the transient condition were plotted and found an identical correlation against the reverse of T c, with high correlation factor of 98.5 % as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2 = exp(47.7 × 10 3/T c - 49.5) This correlation indicated that emission gases were mutually influenced by the concentrations of other gases and correlated to the reaction temperature. Since CO is a reductant of CaSO 4 to liberate SO 2 (CaSO 4 + CO ⇔ CaCO 3 + SO 2) and also CO is a product from the NO/NCO reaction (NO + NCO ⇔ N 2O + CO), a temporary reaction formula is introduced as follows to express interaction among emission gases : CaSO 4 + N 2O + 2CO ⇔ CaCO 3 + 2NO + SO 2 + Volatile - C Since ASH TR - SN index ( = N 2O / SO 2 × (CO/NO) 2) is an equilibrium constant for the above reaction formula, concentrations of emission gases may follow Le Chatorie principle and will be estimated at high accuracy under stationary as well as transient conditions. A key role of CO is also discussed where (SO 2/CO) and (N 2O · CO/ ( NO) 2) are individually correlated to T c.

Original languageEnglish
Pages (from-to)838-839
Number of pages2
JournalNihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy
Volume79
Issue number8
Publication statusPublished - Dec 1 2000

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Gas emissions
Demonstrations
Equilibrium constants
Flue gases
Partial pressure
Temperature
Gases

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Interaction among emission gases evolved at stationary and transient stage in wakamatsu 71 MWe PFBC demonstration plant. / Abe, Rikiya; Sasatsu, Hiroshi; Harada, Tatsuro; Misawa, Nobuhiro; Saitou, Ichirou.

In: Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy, Vol. 79, No. 8, 01.12.2000, p. 838-839.

Research output: Contribution to journalArticle

Abe, Rikiya ; Sasatsu, Hiroshi ; Harada, Tatsuro ; Misawa, Nobuhiro ; Saitou, Ichirou. / Interaction among emission gases evolved at stationary and transient stage in wakamatsu 71 MWe PFBC demonstration plant. In: Nihon Enerugi Gakkaishi/Journal of the Japan Institute of Energy. 2000 ; Vol. 79, No. 8. pp. 838-839.
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abstract = "SYNOPSIS : - Emissions of NO, N 2O, CO 2 and CO in the flue gas from 71 MW PFBC demonstration plant were measured during stationary combustion tests conducted from January to December in 1997. An index of emission gas partial pressure, {p NO/p SO2 · (p CO/P NO) 2] named as ASH TR - SN, was introduced and plotted against the reverse of the average cyclone temperature (T c ). A linear correlation of Van't Hoff law was found with high correlation factor of 90.17 {\%} as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2= exp (47.3 × 10 3/T c-50.4) Also those emissions were measured every five minutes for eight days during a combustion test conducted from November 19 to 26 in 1997. The same index of ASH TR - SN at the transient condition were plotted and found an identical correlation against the reverse of T c, with high correlation factor of 98.5 {\%} as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2 = exp(47.7 × 10 3/T c - 49.5) This correlation indicated that emission gases were mutually influenced by the concentrations of other gases and correlated to the reaction temperature. Since CO is a reductant of CaSO 4 to liberate SO 2 (CaSO 4 + CO ⇔ CaCO 3 + SO 2) and also CO is a product from the NO/NCO reaction (NO + NCO ⇔ N 2O + CO), a temporary reaction formula is introduced as follows to express interaction among emission gases : CaSO 4 + N 2O + 2CO ⇔ CaCO 3 + 2NO + SO 2 + Volatile - C Since ASH TR - SN index ( = N 2O / SO 2 × (CO/NO) 2) is an equilibrium constant for the above reaction formula, concentrations of emission gases may follow Le Chatorie principle and will be estimated at high accuracy under stationary as well as transient conditions. A key role of CO is also discussed where (SO 2/CO) and (N 2O · CO/ ( NO) 2) are individually correlated to T c.",
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T1 - Interaction among emission gases evolved at stationary and transient stage in wakamatsu 71 MWe PFBC demonstration plant

AU - Abe, Rikiya

AU - Sasatsu, Hiroshi

AU - Harada, Tatsuro

AU - Misawa, Nobuhiro

AU - Saitou, Ichirou

PY - 2000/12/1

Y1 - 2000/12/1

N2 - SYNOPSIS : - Emissions of NO, N 2O, CO 2 and CO in the flue gas from 71 MW PFBC demonstration plant were measured during stationary combustion tests conducted from January to December in 1997. An index of emission gas partial pressure, {p NO/p SO2 · (p CO/P NO) 2] named as ASH TR - SN, was introduced and plotted against the reverse of the average cyclone temperature (T c ). A linear correlation of Van't Hoff law was found with high correlation factor of 90.17 % as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2= exp (47.3 × 10 3/T c-50.4) Also those emissions were measured every five minutes for eight days during a combustion test conducted from November 19 to 26 in 1997. The same index of ASH TR - SN at the transient condition were plotted and found an identical correlation against the reverse of T c, with high correlation factor of 98.5 % as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2 = exp(47.7 × 10 3/T c - 49.5) This correlation indicated that emission gases were mutually influenced by the concentrations of other gases and correlated to the reaction temperature. Since CO is a reductant of CaSO 4 to liberate SO 2 (CaSO 4 + CO ⇔ CaCO 3 + SO 2) and also CO is a product from the NO/NCO reaction (NO + NCO ⇔ N 2O + CO), a temporary reaction formula is introduced as follows to express interaction among emission gases : CaSO 4 + N 2O + 2CO ⇔ CaCO 3 + 2NO + SO 2 + Volatile - C Since ASH TR - SN index ( = N 2O / SO 2 × (CO/NO) 2) is an equilibrium constant for the above reaction formula, concentrations of emission gases may follow Le Chatorie principle and will be estimated at high accuracy under stationary as well as transient conditions. A key role of CO is also discussed where (SO 2/CO) and (N 2O · CO/ ( NO) 2) are individually correlated to T c.

AB - SYNOPSIS : - Emissions of NO, N 2O, CO 2 and CO in the flue gas from 71 MW PFBC demonstration plant were measured during stationary combustion tests conducted from January to December in 1997. An index of emission gas partial pressure, {p NO/p SO2 · (p CO/P NO) 2] named as ASH TR - SN, was introduced and plotted against the reverse of the average cyclone temperature (T c ). A linear correlation of Van't Hoff law was found with high correlation factor of 90.17 % as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2= exp (47.3 × 10 3/T c-50.4) Also those emissions were measured every five minutes for eight days during a combustion test conducted from November 19 to 26 in 1997. The same index of ASH TR - SN at the transient condition were plotted and found an identical correlation against the reverse of T c, with high correlation factor of 98.5 % as follows : ASH TR - SN index = N 2O/SO 2 × (CO/NO) 2 = exp(47.7 × 10 3/T c - 49.5) This correlation indicated that emission gases were mutually influenced by the concentrations of other gases and correlated to the reaction temperature. Since CO is a reductant of CaSO 4 to liberate SO 2 (CaSO 4 + CO ⇔ CaCO 3 + SO 2) and also CO is a product from the NO/NCO reaction (NO + NCO ⇔ N 2O + CO), a temporary reaction formula is introduced as follows to express interaction among emission gases : CaSO 4 + N 2O + 2CO ⇔ CaCO 3 + 2NO + SO 2 + Volatile - C Since ASH TR - SN index ( = N 2O / SO 2 × (CO/NO) 2) is an equilibrium constant for the above reaction formula, concentrations of emission gases may follow Le Chatorie principle and will be estimated at high accuracy under stationary as well as transient conditions. A key role of CO is also discussed where (SO 2/CO) and (N 2O · CO/ ( NO) 2) are individually correlated to T c.

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