Effects of H2S and SO2 in the simulated coal combustion flue gas for elementary mercury vapor removal over activated carbons

Md Azhar Uddin; Yuki Yamaji; Toru Yamada; Shengji Wu; Eiji Sasaoka

Effects of H₂S and SO₂ in the simulated coal combustion flue gas for elementary mercury vapor removal over activated carbons

Md Azhar Uddin, Yuki Yamaji, Toru Yamada, Shengji Wu, Eiji Sasaoka

Institute for Global Human Resource Development

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In this work we studied the effects of gas composition, particularly of H₂S and SO₂, on the Hg° removal performance of various un-impregnated activated carbons (ACs) using simulated coal combustion flue gas. Gas-phase Hg° removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100 °C. The simulated flue gases had a composition of Hg° (4.9 ppb), H₂S (0 or 1 or 20 ppm), SO₂ (0 or 487 ppm), CO₂ (10%), H ₂O (4.7%), O2 (5%) and N2 (balance gas). ACs prepared from pitch and petroleum fly ash and coal fly ash exhibited a similar Hg removal capacity as the coconut shell AC. The presence of 20 ppm H₂S and 487 ppm of SO₂ in the simulated flue gases increased the Hg° removal capacity of the ACs significantly. However the effect of 1 ppm H₂S in the presence of SO₂ depended on the type of AC. Hg° removal capacity of coconut shell AC increased even in the presence 1 ppm H₂S but there was no effect of 1 ppm H₂S on the Hg° removal performance of fly ash ACs.

Original language	English
Title of host publication	22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
Pages	1654-1661
Number of pages	8
Publication status	Published - Dec 1 2005
Event	22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005 - Pittsburgh, PA, United States Duration: Sept 12 2005 → Sept 15 2005

Publication series

Name	22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
Volume	2

Other

Other	22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005
Country/Territory	United States
City	Pittsburgh, PA
Period	9/12/05 → 9/15/05

Keywords

Activated Carbon
Coal combustion flue gas
HS
Removal of elemental mercury

ASJC Scopus subject areas

Geotechnical Engineering and Engineering Geology

Cite this

Effects of H₂S and SO₂ in the simulated coal combustion flue gas for elementary mercury vapor removal over activated carbons. / Uddin, Md Azhar; Yamaji, Yuki; Yamada, Toru et al.
22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005. 2005. p. 1654-1661 (22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005; Vol. 2).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Uddin, MA, Yamaji, Y, Yamada, T, Wu, S & Sasaoka, E 2005, Effects of H₂S and SO₂ in the simulated coal combustion flue gas for elementary mercury vapor removal over activated carbons. in 22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005. 22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005, vol. 2, pp. 1654-1661, 22nd Annual International Pittsburgh Coal Conference 2005, PCC 2005, Pittsburgh, PA, United States, 9/12/05.

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abstract = "In this work we studied the effects of gas composition, particularly of H2S and SO2, on the Hg° removal performance of various un-impregnated activated carbons (ACs) using simulated coal combustion flue gas. Gas-phase Hg° removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100 °C. The simulated flue gases had a composition of Hg° (4.9 ppb), H2S (0 or 1 or 20 ppm), SO2 (0 or 487 ppm), CO2 (10%), H 2O (4.7%), O2 (5%) and N2 (balance gas). ACs prepared from pitch and petroleum fly ash and coal fly ash exhibited a similar Hg removal capacity as the coconut shell AC. The presence of 20 ppm H2S and 487 ppm of SO2 in the simulated flue gases increased the Hg° removal capacity of the ACs significantly. However the effect of 1 ppm H2S in the presence of SO2 depended on the type of AC. Hg° removal capacity of coconut shell AC increased even in the presence 1 ppm H2S but there was no effect of 1 ppm H2S on the Hg° removal performance of fly ash ACs.",

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N2 - In this work we studied the effects of gas composition, particularly of H2S and SO2, on the Hg° removal performance of various un-impregnated activated carbons (ACs) using simulated coal combustion flue gas. Gas-phase Hg° removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100 °C. The simulated flue gases had a composition of Hg° (4.9 ppb), H2S (0 or 1 or 20 ppm), SO2 (0 or 487 ppm), CO2 (10%), H 2O (4.7%), O2 (5%) and N2 (balance gas). ACs prepared from pitch and petroleum fly ash and coal fly ash exhibited a similar Hg removal capacity as the coconut shell AC. The presence of 20 ppm H2S and 487 ppm of SO2 in the simulated flue gases increased the Hg° removal capacity of the ACs significantly. However the effect of 1 ppm H2S in the presence of SO2 depended on the type of AC. Hg° removal capacity of coconut shell AC increased even in the presence 1 ppm H2S but there was no effect of 1 ppm H2S on the Hg° removal performance of fly ash ACs.

AB - In this work we studied the effects of gas composition, particularly of H2S and SO2, on the Hg° removal performance of various un-impregnated activated carbons (ACs) using simulated coal combustion flue gas. Gas-phase Hg° removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100 °C. The simulated flue gases had a composition of Hg° (4.9 ppb), H2S (0 or 1 or 20 ppm), SO2 (0 or 487 ppm), CO2 (10%), H 2O (4.7%), O2 (5%) and N2 (balance gas). ACs prepared from pitch and petroleum fly ash and coal fly ash exhibited a similar Hg removal capacity as the coconut shell AC. The presence of 20 ppm H2S and 487 ppm of SO2 in the simulated flue gases increased the Hg° removal capacity of the ACs significantly. However the effect of 1 ppm H2S in the presence of SO2 depended on the type of AC. Hg° removal capacity of coconut shell AC increased even in the presence 1 ppm H2S but there was no effect of 1 ppm H2S on the Hg° removal performance of fly ash ACs.

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