Sulfur sources and sulfur bonding of some central European attrital brown coals

Adolphi, P.; Störr, Manfred; Mahlberg, Paul G.; Murray, Haydn H.; Ripley, Edward M.

doi:10.1016/0166-5162(90)90034-v

Cited by 9 publications

(3 citation statements)

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“…Sulfur (S) is introduced by coal in the form of sulfides, organic sulfur compounds, sulfates, and traces of elemental sulfur . The sulfur content and the way sulfur is bound vary with the type of coal and depend upon the age and location of the coal source .…”

Section: Introductionmentioning

confidence: 99%

“…Sulfates, generally present in low quantities in coal, , are only released during char combustion . Pyrite (FeS 2 ) is usually the main fraction of sulfides in coal. , It is released according to the following reactions: 2 FeS 2 → 2 FeS + S 2 2 FeS → 2 Fe + S 2 S + 2 O 2 → 2 SO 2 Reaction takes place during the heating phase of the fuel, and reaction takes place during the char combustion. Sulfur dioxide (SO 2 ), for example, formed according to reaction , is the thermodynamically favored sulfur oxide at high temperatures (>1000 °C) and oxygen-rich conditions.…”

Section: Introductionmentioning

confidence: 99%

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Conversion of Sulfur during Pulverized Oxy-coal Combustion

et al. 2011

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On the basis of experiments in the Chalmers 100 kW th oxy-fuel test facility, this study presents an analysis of sulfur chemistry of pulverized lignite combustion, comparing oxy-fuel and air-fired conditions. Four test cases were investigated: an air-fired case, two oxy-fuel cases with dry recycling (30 and 35 vol % O 2 ), and one oxy-fuel case with wet recycling (43 vol % O 2 on a dry basis). The amounts of sulfur in the flue-gas, ashes, and condensed water from the condenser were quantified, and a sulfur mass balance was established. The composition of the ashes and the ash-forming matter in the fuel was analyzed. The ashes were investigated by X-ray diffraction, while the size of fuel and ash particles was determined by laser diffraction. In general, the results show that the lignite has a high sulfur self-retention by ash, especially in oxy-fuel combustion. The experiments also show that the conversion of fuel S to SO 2 from oxy-fuel combustion is around 35% lower compared to air-fired conditions, whereas the flue-gas concentration of SO 2 is higher in oxy-fuel combustion because of the absence of air-borne nitrogen.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Conversion of Sulfur during Pulverized Oxy-coal Combustion

et al. 2011

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“…39,40 Sulfur is found in coal in various forms, including sulfides, sulfates, and organic sulfur compounds and most part of the coal-S is released during combustion from sulfides and organic bound sulfur. 41 At temperatures higher than 1000 °C and oxygen-rich conditions, SO 2 is the thermodynamically favored species. H 2 S can be formed in the gas phase or released from coal-S under substiochiometric conditions.…”

Section: Introductionmentioning

confidence: 99%