Development of Pollution Control Technology During Coal Combustion - Simultaneous Multi-Pollutants Removal in Flue Gas by Ozone - page 2

of atmospheric pollutants, especially soot, SO 2 , NO x [3] , CO/CO 2 , volatile organic
compounds (VOCs) [4] , Hg and other trace toxic heavy metals [5,6] , dioxins, and
strong carcinogens. These pollutants irrefutably damage to the atmospheric and
ecological environments and jeopardize human health.
On the basis of the statistics of National Environmental Protection
Administration, 80% of soot emission, 90% of SO 2 emission, 67% of NO x
emissions, 90% of CO 2 emission and 40% of mercury emission of the total were
extremely derived from the direct combustion of coal in China [7] . The
state-of-date and the strictest emission limitations (GB13223-2011) in coal-fired
power plant was promulgated and taken into force in 2012 in China. Thus, it is
more likely that coal energy producers would adapt to the new requirements by
developing and implementing emission control technologies.
1.2 Existing Air Pollution Control Technologies
It is well known that emissions including SO 2 , NO x , mercury, VOCs, and dioxins
from coal combustion are extraordinary harmful to our atmosphere. In china, coal
has been traditionally the major primary energy sources, and its role is expected to
continue growing for the forecasted period, emission derived from coal
combustion has inevitably become prominent. Thus, developing the existing air
pollution control technologies and exploring the reasonable, high-effective
alternative would be a hot issue and attached great importance.
So far, a variety of possible options already existing to reduce these emissions
individually were proposed and carried out, whereas a simultaneous
multi-pollutants removal technology during coal combustion in China is absent up
to now and put forward in this topic.
1.2.1 Desulfurization Technology
Approaches to control SO 2 emission of coal-fired boiler mainly include
pre-combustion, combustion, and post-combustion desulfurization. A brief
introduction to major desulphurization technologies is presented below.