Apogee Scientific has been involved with mercury sorbent evaluations both at full-scale and pilot-scale applications for the last eight years. We have helped sorbent manufacturers fine-tune their materials to provide the end-users with a cost-effective sorbent for use in PAC systems at coal-fired utilities.

Apogee has over ten years of experience in mercury monitoring and controls and has made over 30,000 hours of mercury measurements at a wide variety of plants throughout the country.

The Pollutant Control Pilot Test (PoCT) system is owned by EPRI and is operated by Apogee Scientific, Inc. The system, designed and fabricated by Apogee, has been developed to provide a cost-effective tool to evaluate mercury sorbents in actual flue gas from coal-fired combustors. The PoCT system is comprised of several modules that can be configured either in series or in parallel (2 pulse-jet baghouses and a residence chamber) and can be interchanged as required by a program. The PoCT equipment is set up in an enclosed 24-foot shipping container for easy transport to and installation at a utility site. This system utilizes the plant's existing flue gas to provide the client real-world knowledge on the removal characteristics of their sorbent. For further information, please see the following specifications.

This system has demonstrated great repeatability throughout previous evaluation programs. The mercury control results from the PoCT system have been shown to correlate well with full-scale sorbent injection studies at several utility sites burning bituminous, subbituminous, and lignite coals. Improvements to the PoCT system have continued to be made to advance its versatility and effectiveness in evaluating existing and new sorbents on actual flue gas streams.

• In-Flight Removal: With the residence tube, mercury control is simulating sorbent injection into ductwork. We can look at mercury removals with residence times ranging from 1 to 6 seconds utilizing this configuration. The sorbent samples are injected upstream of the residence chamber. Real-time total, elemental, and, by difference, oxidized vapor-phase mercury concentrations are measured upstream and at the outlets of the chamber using an Apogee CMM.

• Baghouse Removal: Mercury control by injecting sorbents into a baghouse can be simulated by injecting sorbent samples upstream of the PoCT baghouse modules and measuring the vapor-phase mercury concentrations upstream and downstream of the baghouse. Evaluations on different bag fabrics can also be performed. We also have the ability to introduce SO₂ and SO₃ upstream of baghouse to evaluate sorbent performance in a high-acid gas scenario.

• Experience: Take advantage of Apogee's unique experience in the mercury field that no other group can match

• Professionalism: Apogee respects our colleagues and competitors and will provide you with an honest assessment of any potential product or system

• Quality: We promise quality, accurate mercury measurements that provide insight and answers to your mercury questions

• Scheduling: We use flexible scheduling to meet your timing and requirements