With all the talk about compliance with CSAPR and MACT and regulations on HAPs, multi-pollutant control is a much-discussed topic. And with the promulgation of new or revised regulations, compliance deadlines loom, and lengthy analyses may not be possible. At SOLVAir Solutions, we offer real world applications when you're searching for answers to questions on air pollution control and the new regulations.

SOLVAir Select Sodium Bicarbonate

For example, consider a Dry Sorbent Injection system using SOLVAir sodium sorbents. DSI of trona or sodium bicarbonate has emerged as an important SO2 and HCl mitigation technology due to its low capital cost, small installation footprint, ease of operation and flexibility to change fuels.

A DSI system which utilizes Select 300 sodium bicarbonate might be exactly what your mill needs. Considered BACT in the EU for treating HAPs, sodium bicarbonate works here too!

Select 300 sodium bicarbonate neutralizes acid gases very rapidly, especially SO2, and is able to achieve very high pollutant removal rates when used in a properly designed DSI system.

As the sodium bicarbonate enters the hot flue gas stream, it is rapidly converted to sodium carbonate particles with greatly increased surface area and porosity. Select 300 is particularly versatile because it is effective over a wide range of operating temperatures.

SOLVAir Select Trona

Used as a dry sorbent injected into DSI systems, Select 200 trona forms a safe, non-corrosive waste product that will not damage equipment.

Utilizing simple chemistry, trona effectively removes a variety of acid gases. In temperatures above 275°F, it is readily transformed into soda ash (sodium carbonate). Soda ash then reacts with the acids to form neutral sodium salts.

Both Select 200 trona and Select 300 sodium bicarbonate remove SO2, SO3, and HCl at higher rates than lime. Field testing shows removal rates of SO2 over 90%. Trona or sodium bicarbonate routinely achieve HCl removal of 95-99%. In addition, either of these products can help remove 20-70% Hg when used alone in high sulfur environments, and over 90% when used in combination with activated carbon.

Product Availability and Support

SOLVAir Solutions has been working with the pulp & paper industry for more than 20 years, and if concerns are on your mind about the continued availability of sodium sorbents, we want to assure you that product is available for dedicated customers. Located in Green River, Wyoming, our trona mine is situated on the largest trona deposit in the world, and that deposit is estimated to hold as much as 47 billion tons of trona.

To discuss HCl, SO2, SO3, Hg or HF problems, DSI and product availability, or just for more information on how SOLVAir Solutions can help with new regulations, give us a call at 800-765-8292 or email michael.wood@solvay.com.

SOLVAir® Solutions
www.solvair.us