Hydrodesulfurization of chlorinized coal

Patent · Tue Jul 05 04:00:00 EDT 1983

OSTI ID:5740299

Kalvinskas, J J; Rohatgi, N K

A method of desulfurization is described in which high sulfur coals are desulfurized by low temperature chlorinolysis of coal in liquid media, preferably water, followed by hydrodesulfurization at a temperature above 500/sup 0/C. The coals are desulfurized to an extent of up to 90% by weight and simultaneously dechlorinated to a chlorine content below 0.1% by weight. The product coals have lower volatiles loss, lower oxygen and nitrogen content and higher fixed carbon than raw coals treated with hydrogen under the same conditions. Heating the chlorinated coal to a temperature above 500/sup 0/C. in inert gas such as nitrogen results in significantly less desulfurization.

• Assignee: The United States of America as represented by the Administrator of the National Aeronautics and Space Administration
• Patent Number(s): US 4391609
• OSTI ID: 5740299
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010402* -- Coal
Lignite
& Peat-- Purification & Upgrading
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHLORINATION
COAL
DECHLORINATION
DEHALOGENATION
DESULFURIZATION
DISPERSIONS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HALOGENATION
HYDROGENATION
MATERIALS
MIXTURES
SLURRIES
SUSPENSIONS