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SO3 & Sulfuric Acid Mist Sorbent Traps

A simple alternative to other, more cumbersome methods

Available for Download

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

Product Details

SO3 & Sulfuric Acid Mist Sorbent Traps 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)

SO3 & Sulfuric Acid Mist Sorbent Traps Technical Specifications

Please see attached flyer

Typical Applications for SO3 & Sulfuric Acid Mist Sorbent Traps

  • Coal-Fired Power Plants
  • Sulfuric Acid Plants
  • Pulp and Paper Plants
  • Others

Available Measurements for SO3 & Sulfuric Acid Mist Sorbent Traps

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