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Title: Process for removal of hazardous air pollutants from coal

Patent ·
OSTI ID:873423
 [1];  [2];  [3];  [4]
  1. Indiana, PA
  2. Silver Spring, MD
  3. Burtonsville, MD
  4. Mountain View, CA
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An improved process for removing mercury and other trace elements from coal containing pyrite by forming a slurry of finely divided coal in a liquid solvent capable of forming ions or radicals having a tendency to react with constituents of pyrite or to attack the bond between pyrite and coal and/or to react with mercury to form mercury vapors, and heating the slurry in a closed container to a temperature of at least about 50.degree. C. to produce vapors of the solvent and withdrawing vapors including solvent and mercury-containing vapors from the closed container, then separating mercury from the vapors withdrawn.

Research Organization:
CQ INC
DOE Contract Number:
AC22-95PC95153
Assignee:
Howard University (Washington, DC); CQ Inc. (Homer City, PA)
Patent Number(s):
US 6156281
OSTI ID:
873423
Country of Publication:
United States
Language:
English

References (3)

The Redistribution of Trace Elements During the Beneficiation of Coal book January 1995
Role of coal cleaning in control of air toxics journal August 1994
The Mechanisms of Trace Element Removal During Coal Cleaning journal July 1998

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Related Subjects

process
removal
hazardous
air
pollutants
coal
improved
removing
mercury
trace
elements
containing
pyrite
forming
slurry
finely
divided
liquid
solvent
capable
radicals
tendency
react
constituents
attack
bond
form
vapors
heating
closed
container
temperature
50
degree
produce
withdrawing
including
mercury-containing
separating
withdrawn
solvent capable
closed container
trace element
improved process
finely divided
liquid solvent
mercury vapor
removing mercury
air pollutants
coal containing
divided coal
containing vapor
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