The market for selective catalytic reduction (SCR) systems
and replacement catalyst will reach a record $7.6 billion this
year (Fig. 2). This is according to the latest forecast
published by the McIlvaine Co.
Fig. 2. The market for
catalytic reduction (SCR) systems
and replacement catalyst will reach a
record $7.6 billion this year.
Sales of systems are projected at $6.1 billion. This
includes the ammonia-injection system, the catalyst, housing
and all the ductwork and other components contracted with SCR
system suppliers. McIlvaine says sales of catalyst are rising
steadily. They will exceed $1.5 billion in 2011 mainly due to
the replacement needs. The largest application is coal-fired boilers where catalyst life is less
than five years. Gas turbines are another large application.
Recently there has been a big market in the US for SCR systems
for peaking turbines. This has created a need for
high-temperature catalyst. Several catalyst suppliers have
developed a product to meet this need. However, many purchasers
are avoiding the risk by using conventional catalyst and
bleeding in air to reduce temperatures.
Cement industry. The cement industry is the
next big target for NOx control. There are some SCR systems
installed on cement kilns in Europe and a number slated for
future installation in the US. Waste incinerators and nitric
acid plants are other applications. Biomass-fired boilers present problems because of
the poisoning potential of constituents in the fuel.
Asia is the largest geographical market thanks to a big
program in China to install SCR systems on new boilers and retrofit SCR on older
boilers in the more populated areas. Japan, South Korea and
Taiwan are also significant markets.
The market in the US is quite active due to recent
regulations. It promises further growth based on new ambient
air quality rules. These will force individual states to
require NOx control not only on large coal-fired boilers but on industrial boilers as
In Europe the biggest near-term potential is NOx control on
lignite-fired boilers which were not equipped with
SCR originally due to the lower NOx emissions and high cost.
New EU regulations require the larger lignite-fired boilers to reduce NOx by 2016.