The proposed MATS/MACT standards for both utilities and industrial boilers focus on removal of HCl. At many sites, HCl occurs in the presence of SO2. While many sites use sodium sorbents to remove HCl, and many others remove SO2 or other acid gases, publicly available data on the removal of HCl in the presence of SO2 has been scarce, until now.
SOLVAir Solutions recently conducted pilot plant tests to make this data available. The tests demonstrate the selectivity of sodium sorbents to remove HCl in a medium to high sulfur environment. Sodium bicarbonate and trona were used in two PM control devices: ESP and Baghouse. The results incontrovertibly prove that dry injection of sodium bicarbonate or trona can achieve >99% removal rates for HCl, and >90% for SO2
, and is able to help plants meet the HCl limit in the upcoming MATS. Click here
to access our recent presentation documenting the tests (HCl Removal in the Presence of SO2
Using Dry Sodium Sorbent Injection) or go to epa.gov
for the most up-to-date regulatory information.