LONDON Alcoa Inc. is
piloting new emissions reduction technology at its baked anode
and calcined coke facility in Lake Charles, La.
The technology can reduce sulfur
dioxide, particulate matter and hydrogen fluoride emissions at
the plant by up to 90 percent, Pittsburgh-based Alcoa said,
adding that the Alcoa In-Duct Scrubber will also offer
significantly lower installation costs than more established
emissions cleansing technologies and lower operating costs,
using half as much water and 30-percent less energy.
"Alcoas experts have
extended the boundary of traditional scrubbing equipment,
enabling a more cost-effective, robust and sustainable
alternative for reducing industrial emissions," chief
technology officer and executive vice president Ray Kilmer
said. "Following successful completion of this pilot, we plan
to commercialize our technology to help other companies reduce
emissions at a fraction of the cost of using conventional
scrubbers, making it a bankable technology."
While conventional wet scrubbers pump a limestone- or
sodium-based solution to the top of a 100-foot tower and spray
it onto flue gas, the In-Duct Scrubber moves flue gas from the
smelter or boiler into a horizontal chamber and sprays a
sodium-based solution in the same direction as the gas flow.
Commissioning and testing is expected to be complete by August
A version of this article
was first published in AMM sister publication Metal