Chemistry of sulfur in char and the implications for coal sulfur management in hydrogasification/hydrodesulfurization

Thesis/Dissertation · Mon Jan 01 04:00:00 EST 1979

OSTI ID:6412001

Mciver, A E

The equilibrium distribution of sulfur between organic sulfur in char and gaseous hydrogen sulfuide was studied at 1200-1600F, partial pressure ratios (P/sub H/2/sub s//P/sub H/2) of 1:1-100:1, and 1 atm for chars derived from coals varying from lignite to anthracite. The extent of char sulfidation is not uniquely dependent on char surface area, but decreases with increasing char rank and the rank of the coal from which the char is derived. Char desulfurization kinetics were a function of the physiochemical history of the char, i.e., it is a path-dependent process. The partial pressure ratio is a pressure-dependent parameter that governs the extent of char sulfidation, a reversible process. The analogy between oxygen and sulfur chemistries in char, and the implications for coal desulfurization are discussed.

• Research Organization: Carnegie-Mellon Univ., Pittsburgh, PA (USA)
• OSTI ID: 6412001
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
010600 -- Coal
Lignite
& Peat-- Properties & Composition
ANTHRACITE
BLACK COAL
BROWN COAL
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COAL GASIFICATION
DATA
DESULFURIZATION
ELEMENTS
ENERGY SOURCES
EQUILIBRIUM
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GASIFICATION
HIGH TEMPERATURE
HYDROGEN COMPOUNDS
HYDROGEN SULFIDES
INFORMATION
KINETICS
LIGNITE
MATERIALS
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN
PARTIAL PRESSURE
PRESSURE DEPENDENCE
PYROLYSIS PRODUCTS
QUANTITY RATIO
REACTION KINETICS
SULFIDATION
SULFIDES
SULFUR
SULFUR COMPOUNDS
SURFACE AREA
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES