SO_₃ & Sulfuric Acid Mist Sorbent Traps

A simple alternative to other, more cumbersome methods

These innovative sorbent traps capture SO3, Sulfuric Acid Mist, and H2SO4 and are especially useful for SCR engineering purposes, although they can be sampled anywhere from economizer outlet to stack.

It’s important to measure SO3 for a variety of reasons, including:

Very corrosive
Competes with Hg for active sites on Activated Carbon (ACI)
Contributes to ammonium bisulfate (ABS) formation on SCR Catalyst, inhibiting denitration
Contributes to air preheater (APH) fouling issues
Leads to blue plume formation

Features

Simple alternative to cumbersome Method 8A:

Sampling impinger trains typically require a team of technicians and significant mobilization time
Sampling locations are difficult to access and unforgiving to the specialty glassware used
Impinger solutions may consist of hazardous materials that must be transferred and containerized on-site.

Quality verified via EPA Method 30B QC performance criteria:

Breakthrough
Pair Agreement
Spike Recovery
Various Sampling/Analytical Checks

Suitable locations include:

Measuring SO3 upstream and downstream of the SCR in order to determine the conversion rate of SO2 to SO3
Used in conjunction with mercury oxidation studies around the SCR
ESP Outlet (recommend isokinetic sampling)
Stack (recommend isokinetic sampling