Pharmaceutical Manufacturer Turns NOx Regulations Into an Opportunity – With a
6-Figure Annual Chemical Savings as a Bonus This project was for a major manufacturer of a tabletted OTC analgesic. The manufacturing process
was being redesigned, and a critical aspect of the work was the re-engineering of a reactor in the
initial stage of manufacturing. The client’s original process, which used nitric acid to dissolve a metal, exhausted virtually 100%
nitrogen oxide (NO), a toxic, wholly non-water-soluble gas that reacts with oxygen to form a distinctive
brown plume at concentrations as low as 50-125 ppm, depending on stack diameter. The original environmental control device had been installed prior to 1978 and was “grand-fathered” under the
stricter requirements introduced by the Clean Air Act. The redesigned process would require the
meeting of new, more stringent regulations. The requirement was to identify a proven system that used Best Available Control Technologies
(BACT) for NOx. Tri-NOx Multi-Chem technology was selected as the foundation for a solution. Tri-NOx can be
adapted to achieve virtually any concentration level at the stack, and any incoming NO/NO2 ratio.
In contrast to SCR (selective catalytic reduction) devices, Tri-NOx is not vulnerable to catalyst
plugging, and will accommodate ambient temperature gas streams. The standard Tri-NOx Multi-Chem employs a proprietary oxidizing compound, plus dilute sulfuric
acid in the first stage. The client preferred not to add these to their chemical inventory, so an
alternative was developed. The custom design engineered for this application uses air oxidation
of NO gas in the first stage to achieve a target NO/NO2 ratio for treatment in the second stage
of the Tri-NOx system. A combination of recent studies and published research indicated that if gas flows were not massive,
the Tri-NOx Multi-Chem could use air oxidation as an effective first stage. A design was developed
that would convert sufficient NO to NO2. Process simulations indicated that chemical savings alone
would exceed $100,000 per year. The client approved the preliminary concept and detail-engineering was completed. Tri-Mer
manufactured the equipment and the system was installed and commissioned. Start-up was
uneventful and met all client and regulatory requirements. Combining proven BACT system concepts with innovations tailored to the client’s process produced
an answer that was both effective and cost-efficient. The investment required to do the process
evaluation, and subsequent engineering, produced direct cost savings of $1,000,000 over ten years. For NOx brochure, click here. CASE STUDY #1: Tri-NOx® Multi-Chem Wet Scrubber.
Case study of our NOx scrubber in a plastics resin plant. CASE STUDY #2: Tri-NOx® Multi-Chem Wet Scrubber.
Case study of our NOx scrubber in an automotive manufacturing plant. CASE STUDY #3: Tri-NOx® Multi-Chem Wet Scrubber.
Case study of our NOx scrubber in a hydroprocessing plant. View/print our newsletter in Acrobat pdf format. TRI-NOX / CASE STUDY 1 / CASE STUDY 2 / CASE STUDY 3
CASE STUDY 4 / TRI-NOX SPECIFICATIONS Have a potential application? Contact Tri-Mer HOME l BUY ON-LINE l INTERNET SPECIAL
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