Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents

Shengji Wu; Masaki Ozaki; Azhar Uddin; Eiji Sasaoka

Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents

Shengji Wu, Masaki Ozaki, Azhar Uddin, Eiji Sasaoka

Institute for Global Human Resource Development

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

4 Citations (Scopus)

Abstract

Laboratory studies were conducted to develop an elemental mercury (Hg ⁰) removal process based on the reaction of H₂S and Hg⁰ using iron oxide sorbents for coal derived fuel gas. It is well known that hydrogen chloride (HCl) is present in the fuel gases of some types of coal, but the effect of HCl on the Hg⁰ removal performance of iron based sorbents in coal derived fuel gases is not yet understood. In this study, the effects of HCl on the removal of Hg⁰ from coal derived fuel gases over iron based sorbents such as iron oxides, iron oxide-Ca(OH)₂, and iron sulfides were investigated. The iron oxides were prepared by precipitation and conventional impregnation methods. The iron oxide-Ca(OH) ₂ sample was prepared by mixing iron oxide with Ca(OH)₂ mechanically. Iron disulfide (FeS₂) used in this study was a reagent grade chemical. The Hg⁰ removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100°C using simulated fuel gases having the composition of Hg⁰ (4.8 ppb), H ₂S (400 ppm), HCl (0-10ppm), CO (30%), H₂ (20%), H ₂O (8%), and N₂ (balance gas). In the case of iron oxides, the presence of HCl suppressed the Hg⁰ removal rate. However, the Hg⁰ removal rate of iron oxide-Ca(OH)₂ was not affected by the presence of HCl, because Ca(OH)₂ reacted with HCl. The Hg ⁰ removal performance of FeS₂ was not suppressed by the presence of HCl in the coal derived fuel gas.

Original language	English
Title of host publication	23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development
Publication status	Published - 2006
Event	23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development - Pittsburgh, PA, United States Duration: Sep 25 2006 → Sep 28 2006

Other

Other	23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development
Country	United States
City	Pittsburgh, PA
Period	9/25/06 → 9/28/06

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Keywords

Coal derived fuel gas
COS
HS
Iron oxide
Removal of mercury vapor

ASJC Scopus subject areas

Energy Engineering and Power Technology
Condensed Matter Physics

Cite this

Wu, S., Ozaki, M., Uddin, A., & Sasaoka, E. (2006). Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents. In 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development

Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents. / Wu, Shengji; Ozaki, Masaki; Uddin, Azhar; Sasaoka, Eiji.

23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development. 2006.

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

Wu, S, Ozaki, M, Uddin, A & Sasaoka, E 2006, Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents. in 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development. 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development, Pittsburgh, PA, United States, 9/25/06.

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abstract = "Laboratory studies were conducted to develop an elemental mercury (Hg 0) removal process based on the reaction of H2S and Hg0 using iron oxide sorbents for coal derived fuel gas. It is well known that hydrogen chloride (HCl) is present in the fuel gases of some types of coal, but the effect of HCl on the Hg0 removal performance of iron based sorbents in coal derived fuel gases is not yet understood. In this study, the effects of HCl on the removal of Hg0 from coal derived fuel gases over iron based sorbents such as iron oxides, iron oxide-Ca(OH)2, and iron sulfides were investigated. The iron oxides were prepared by precipitation and conventional impregnation methods. The iron oxide-Ca(OH) 2 sample was prepared by mixing iron oxide with Ca(OH)2 mechanically. Iron disulfide (FeS2) used in this study was a reagent grade chemical. The Hg0 removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100°C using simulated fuel gases having the composition of Hg0 (4.8 ppb), H 2S (400 ppm), HCl (0-10ppm), CO (30%), H2 (20%), H 2O (8%), and N2 (balance gas). In the case of iron oxides, the presence of HCl suppressed the Hg0 removal rate. However, the Hg0 removal rate of iron oxide-Ca(OH)2 was not affected by the presence of HCl, because Ca(OH)2 reacted with HCl. The Hg 0 removal performance of FeS2 was not suppressed by the presence of HCl in the coal derived fuel gas.",

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AU - Wu, Shengji

AU - Ozaki, Masaki

AU - Uddin, Azhar

AU - Sasaoka, Eiji

PY - 2006

Y1 - 2006

N2 - Laboratory studies were conducted to develop an elemental mercury (Hg 0) removal process based on the reaction of H2S and Hg0 using iron oxide sorbents for coal derived fuel gas. It is well known that hydrogen chloride (HCl) is present in the fuel gases of some types of coal, but the effect of HCl on the Hg0 removal performance of iron based sorbents in coal derived fuel gases is not yet understood. In this study, the effects of HCl on the removal of Hg0 from coal derived fuel gases over iron based sorbents such as iron oxides, iron oxide-Ca(OH)2, and iron sulfides were investigated. The iron oxides were prepared by precipitation and conventional impregnation methods. The iron oxide-Ca(OH) 2 sample was prepared by mixing iron oxide with Ca(OH)2 mechanically. Iron disulfide (FeS2) used in this study was a reagent grade chemical. The Hg0 removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100°C using simulated fuel gases having the composition of Hg0 (4.8 ppb), H 2S (400 ppm), HCl (0-10ppm), CO (30%), H2 (20%), H 2O (8%), and N2 (balance gas). In the case of iron oxides, the presence of HCl suppressed the Hg0 removal rate. However, the Hg0 removal rate of iron oxide-Ca(OH)2 was not affected by the presence of HCl, because Ca(OH)2 reacted with HCl. The Hg 0 removal performance of FeS2 was not suppressed by the presence of HCl in the coal derived fuel gas.

AB - Laboratory studies were conducted to develop an elemental mercury (Hg 0) removal process based on the reaction of H2S and Hg0 using iron oxide sorbents for coal derived fuel gas. It is well known that hydrogen chloride (HCl) is present in the fuel gases of some types of coal, but the effect of HCl on the Hg0 removal performance of iron based sorbents in coal derived fuel gases is not yet understood. In this study, the effects of HCl on the removal of Hg0 from coal derived fuel gases over iron based sorbents such as iron oxides, iron oxide-Ca(OH)2, and iron sulfides were investigated. The iron oxides were prepared by precipitation and conventional impregnation methods. The iron oxide-Ca(OH) 2 sample was prepared by mixing iron oxide with Ca(OH)2 mechanically. Iron disulfide (FeS2) used in this study was a reagent grade chemical. The Hg0 removal experiments were carried out in a laboratory-scale fixed-bed reactor in a temperature range of 60-100°C using simulated fuel gases having the composition of Hg0 (4.8 ppb), H 2S (400 ppm), HCl (0-10ppm), CO (30%), H2 (20%), H 2O (8%), and N2 (balance gas). In the case of iron oxides, the presence of HCl suppressed the Hg0 removal rate. However, the Hg0 removal rate of iron oxide-Ca(OH)2 was not affected by the presence of HCl, because Ca(OH)2 reacted with HCl. The Hg 0 removal performance of FeS2 was not suppressed by the presence of HCl in the coal derived fuel gas.

KW - Coal derived fuel gas

KW - COS

KW - HS

KW - Iron oxide

KW - Removal of mercury vapor

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BT - 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development

T2 - 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development

Y2 - 25 September 2006 through 28 September 2006

ER -

Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents

Abstract

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Keywords

ASJC Scopus subject areas

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