Abstract
Development of an elemental mercury (Hg0) removal process for coal derived fuel gas is an important issue in the development of a clean and highly efficient coal power generation system. Recently, iron-based sorbents such as iron oxide (Fe2O3), supported iron oxide on TiO2, and iron disulfide have been proposed as active mercury sorbents. It was supposed that Hg0 reacted with H2S on the iron-based sorbents and captured mercury. However, the mercury species captured on the sorbents have not been directly characterized yet. The captured mercury species was too small to identify because the concentration of Hg0 was very low (ppb order). In this study, a temperature programmed decomposition technique is applied in order to understand the decomposition character of the mercury species captured on iron-based sorbents. The Hg0 removal experiments were carried out in a laboratory-scale fixed-bed reactor at 80 °C using simulated fuel gas. After the Hg0 removal experiments, desorption of the captured mercury species was carried out in the same fixed-bed reactor using an atomic absorption spectrophotometer. Temperature programmed decomposition desorption (TPDD) experiments revealed that the decomposition characteristic of mercury species captured on the sorbent was similar to that of HgS reagents (cinnabar and meta-cinnabar). Furthermore, it was observed that the characteristics of the decomposition of mercury species depended on the sorbent type of sorbents and reaction conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 3610-3615 |
| Number of pages | 6 |
| Journal | Fuel |
| Volume | 87 |
| Issue number | 17-18 |
| DOIs | |
| Publication status | Published - Dec 2008 |
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Keywords
- Coal derived fuel gas
- Decomposition of mercury species
- Iron-based-sorbent
- Mercury removal
ASJC Scopus subject areas
- Organic Chemistry
- Energy Engineering and Power Technology
- Fuel Technology
Cite this
Temperature programmed decomposition desorption of the mercury species over spent iron-based sorbents for mercury removal from coal derived fuel gas. / Ozaki, Masaki; Uddin, Azhar; Sasaoka, Eiji; Wu, Shengji.
In: Fuel, Vol. 87, No. 17-18, 12.2008, p. 3610-3615.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Temperature programmed decomposition desorption of the mercury species over spent iron-based sorbents for mercury removal from coal derived fuel gas
AU - Ozaki, Masaki
AU - Uddin, Azhar
AU - Sasaoka, Eiji
AU - Wu, Shengji
PY - 2008/12
Y1 - 2008/12
N2 - Development of an elemental mercury (Hg0) removal process for coal derived fuel gas is an important issue in the development of a clean and highly efficient coal power generation system. Recently, iron-based sorbents such as iron oxide (Fe2O3), supported iron oxide on TiO2, and iron disulfide have been proposed as active mercury sorbents. It was supposed that Hg0 reacted with H2S on the iron-based sorbents and captured mercury. However, the mercury species captured on the sorbents have not been directly characterized yet. The captured mercury species was too small to identify because the concentration of Hg0 was very low (ppb order). In this study, a temperature programmed decomposition technique is applied in order to understand the decomposition character of the mercury species captured on iron-based sorbents. The Hg0 removal experiments were carried out in a laboratory-scale fixed-bed reactor at 80 °C using simulated fuel gas. After the Hg0 removal experiments, desorption of the captured mercury species was carried out in the same fixed-bed reactor using an atomic absorption spectrophotometer. Temperature programmed decomposition desorption (TPDD) experiments revealed that the decomposition characteristic of mercury species captured on the sorbent was similar to that of HgS reagents (cinnabar and meta-cinnabar). Furthermore, it was observed that the characteristics of the decomposition of mercury species depended on the sorbent type of sorbents and reaction conditions.
AB - Development of an elemental mercury (Hg0) removal process for coal derived fuel gas is an important issue in the development of a clean and highly efficient coal power generation system. Recently, iron-based sorbents such as iron oxide (Fe2O3), supported iron oxide on TiO2, and iron disulfide have been proposed as active mercury sorbents. It was supposed that Hg0 reacted with H2S on the iron-based sorbents and captured mercury. However, the mercury species captured on the sorbents have not been directly characterized yet. The captured mercury species was too small to identify because the concentration of Hg0 was very low (ppb order). In this study, a temperature programmed decomposition technique is applied in order to understand the decomposition character of the mercury species captured on iron-based sorbents. The Hg0 removal experiments were carried out in a laboratory-scale fixed-bed reactor at 80 °C using simulated fuel gas. After the Hg0 removal experiments, desorption of the captured mercury species was carried out in the same fixed-bed reactor using an atomic absorption spectrophotometer. Temperature programmed decomposition desorption (TPDD) experiments revealed that the decomposition characteristic of mercury species captured on the sorbent was similar to that of HgS reagents (cinnabar and meta-cinnabar). Furthermore, it was observed that the characteristics of the decomposition of mercury species depended on the sorbent type of sorbents and reaction conditions.
KW - Coal derived fuel gas
KW - Decomposition of mercury species
KW - Iron-based-sorbent
KW - Mercury removal
UR - http://www.scopus.com/inward/record.url?scp=50949116596&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=50949116596&partnerID=8YFLogxK
U2 - 10.1016/j.fuel.2008.06.011
DO - 10.1016/j.fuel.2008.06.011
M3 - Article
AN - SCOPUS:50949116596
VL - 87
SP - 3610
EP - 3615
JO - Fuel
JF - Fuel
SN - 0016-2361
IS - 17-18
ER -