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
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
}
TY - GEN
T1 - Mercury vapor capture from coal derived fuel gas in the presence of hydrogen chloride over iron based sorbents
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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M3 - Conference contribution
SN - 1890977233
SN - 9781890977238
BT - 23rd Annual International Pittsburgh Coal Conference, PCC - Coal-Energy, Environment and Sustainable Development
ER -