Removal of organic sulphur from coal gas

Bhatia, S.

doi:10.1002/cjce.5450490509

Cited by 6 publications

(2 citation statements)

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“…• grains/100 SCF) in the form of carbon disulfide, thiophene, mercaptans and c•atbonyl sulfide (Bhatia ( 1971)) • The composi,~ion of low-BTU gas is variable depending on the particular gasifier. A typical product gas stream frorii ari airblown fluid-bed gas producer ought to have composition . '…”

Section: Discussionmentioning

confidence: 99%

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Hot-gas desulfurization. II. Use of gasifier ash in a fluidized-bed process. Final report

Schrodt¹

1981

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Three gasifier coal ashes were used as reactant/sorbents in batch fluidized-beds to remove hydrogen sulfide from hot, made-up fuel gases. It is predominantly the iron oxide in the ash that reacts with and removes the hydrogen. sulfide; the sulfur reappears in ferrous sulfide. Sulfided ashes were regenerated by hot, fluidizing streams of oxygen in air; the sulfur is recovered as sulfur dioxide, exclusively. Ash sorption efficiency and sulfur capacity increase and stablize after several cycies of use. These two parameters vary directiy with the iron oxide coritent of the ash artd process temperature, but are independent of particle size in the range 0.01-0.02 em .. A western Kentucky No. 9 ash containing 22 weight percent iron as iron oxide sorbed 4.3 weight percent sulfur at 1200°F with an ash sorption efficiency of 0.83 at ten percent breakthrough. A glob~l, fluidized-bed, reaction rate model wa$ fitted to the data and it was conciuded that chemical kinetics is the controlling mechanism with a predicted activation energy of 19,600 BTU/lb mol. Iron oxide reduction and the water-gas-shift reaction were two side reactions that occurred•du~ing desulfurization. The regeneration reaction occurred very rapidly in the ii fluid-bed regime, and it is suspected that mass transfer is the controlling phenomenon.

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Section: Discussionmentioning

confidence: 99%

“…All are based on the reaction of H 2 S with ~ron oxides to form-iron sulfides. Regeneration of the spent solid is• achieved by reacting the sulfides with air to produce so 2 ina concentrated form, or with water vapor to produce elemental sulfur (Bhatia (1971)).…”

Section: 2~1~mentioning

confidence: 99%