Sulfur retention in bituminous coal ash

Book · Sat Jan 01 04:00:00 EST 1966

OSTI ID:6436563

Rees, O W

Tests were performed on samples of Illinois No. 5 coal and Illinois No. 6 coal to determine some of the factors affecting S retention in coal ash. Total S, CaO, and Fe/sub 2/O/sub 3/ were found to affect the amount of S retained in the coal ash. Samples of the 2 coals were ashed at 800/sup 0/C and were analyzed for S and CaO content by gravimetric methods. A relationship was found to exist between S retention and the total S and CaO content of the coal; that is, S retention in the ash was greater in samples with higher amounts of S and CaO. However, because the CaO retains the S in the ash in the form of CaSO/sub 4/, this reaction would not be applicable to industrial uses where combustion temperatures exceed the decomposition temperature of CaSO/sub 4/. Iron oxide, formed from pyrite in the coal, was found to have the ability to catalyze the transformation of SO/sub 2/ to SO/sub 3/. The SO/sub 3/ more readily reacts with CaO to form CaSO/sub 4/, which is retained in the coal ash.

• OSTI ID: 6436563
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKALINE EARTH METAL COMPOUNDS
ASHES
BITUMINOUS COAL
BLACK COAL
CALCIUM COMPOUNDS
CALCIUM OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
COAL DEPOSITS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
GREAT LAKES REGION
ILLINOIS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
ORES
OXIDES
OXYGEN COMPOUNDS
PYRITE
PYRITES
RESIDUES
RESOURCES
SULFIDES
SULFUR COMPOUNDS
SULFUR CONTENT
SULFUR DIOXIDE
SULFUR ORES
SULFUR OXIDES
SULFUR TRIOXIDE
TRANSITION ELEMENT COMPOUNDS
USA