ABSTRACT
A concern for preserving the quality of the environment resulted in
research and development program and placed special emphasis on the
sulfur oxides emissions from coal-fired stationary combustion sources
l. The use of low-sulfur coal either naturally occurring or physically cleaned
2. Removal of sulfur oxides from the combustion flue gas via stack gas scrubbing (flue gas desulfurization)
gasification and liquefaction
process. Another approach to controlling sox emissions could be the
combined use of physical coal cleaning (also referred to as coal bene-
from combined physical cleaning and flue gas desulfurization include
lower effective transportation costs, (4) reduced operating and mainte-
nance costs, (5) lower coal grinding and ash disposal costs, and (6)
lower emission control costs.
