Optimal temperature of fixed-bed reactor for high temperature removal of hydrogen sulfide

Lee, Young-Soo; Yoo, Kyong-Ok; Gavalas, George R.

doi:10.1007/bf02707186

Cited by 7 publications

(2 citation statements)

References 10 publications

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“…Our previous researches reported optimal temperature for the sulfidation and regeneration (Lee et al, 1991;Park et al, 1992). Therefore, sulfidation and oxidative regeneration was carried out at 650 and 750 °C, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Many investigations have been carried out about high-temperature removal of H2S in hot coal-derived gas using metal oxide or mixed metal oxide sorbents (Cannon and Denbigh, 1957; Tamhankar et al, 1981Tamhankar et al, , 1986Grindley et al, 1981;Yumura and Furimsky, 1986;Yoo, 1986; Lee et al, 1991;Choi et al, 1992;Park et al, 1992). It was reported that ZnO was a very effective sorbent for H2S removal, but it has a big flaw to vaporize elemental zinc above 600 °C (Lew et al, 1989).…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ferric Oxide on the High-Temperature Removal of Hydrogen Sulfide over ZnO-Fe2O3 Mixed Metal Oxide Sorbent

Lee¹,

Kim²,

Yoo³

1995

Ind. Eng. Chem. Res.

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The effect of ferric oxide on the removal of hydrogen sulfide over ZnO-Fez03 mixed metal oxide sorbents and on the oxidative regeneration of sulfided sorbents was investigated. When ferric oxide was added to the zinc oxide, the reduction of ZnO was retarded by interaction of ZnO with ZnFe204. This interaction was confirmed by larger binding energies of Zn 2~312 and Zn 2~112, identified by ESCA, of the ZnO-ZnFe204 sorbent than those of ZnO. Zinc ferrite with a spinel structure yielded not only high H2S removal capacity but also much SO2 generation. A linear increase of SO2 generation was confirmed up t o 50 wt % Fe203. Resulting from the thermal decomposition of H2S over metal sulfides, H2 generation increased with respect to Fez03 according to a quadratic equation. Channeling, caused by sintering during sulfidation, made the flow path of the reactant change and thus pure ZnO sorbent and the sorbent containing 3 wt % Fez0 did not sulfurate completely. Addition of Fez03 prevented surface structural change like sintering of ZnO during sulfidation.

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Section: Methodsmentioning

confidence: 99%