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Process Equipment for Every Application

Explore our full range of process equipment engineered for precision, performance, and durability. From industrial mixers and stainless steel tanks to custom mixing systems and mills, we deliver scalable solutions for every stage of your production process.

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Complete Environmental Solutions

From air pollution control to advanced water treatment, Branch Environmental by MXD Process delivers engineered systems that help you meet environmental regulations and operational goals.

EXPLORE WATER & AIR TREATMENT SOLUTIONS

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Full-Service Support for Process Systems

MXD Process offers end-to-end services—from custom fabrication and engineering to automation, lab testing, and equipment refurbishing—to bring your process to life and keep it running smoothly.

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Expert Insights & Support Tools

Access MXD Process resources including blogs, technical guides, manuals, and maintenance tips—everything you need to optimize, troubleshoot, and expand your process knowledge.

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Discover who we are, the industries we serve, and the trusted brands behind our process equipment and environmental solutions. Learn how our team brings precision, innovation, and reliability to every project.

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Selective Catalytic Reduction

Advanced NOₓ Removal for High-Temperature Applications

Designed for high-temperature operations, SCR systems use ammonia or urea injection and a specialized catalyst to convert harmful NO and NO₂ into harmless nitrogen and water vapor—without the formation of byproducts like N₂O or excess NOₓ.

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Why Choose SCR Technology?

SCR offers significant advantages over traditional scrubbing methods, especially when dealing with high-temperature or low-solubility gas streams. Scrubbing NOₓ is difficult and costly due to poor solubility in water and unwanted byproduct formation. SCR provides a clean, dry, and highly efficient alternative—making it ideal for everything from boilers and gas turbines to nitric acid processes.

Applications:

  • Flue gas treatment from incinerators, kilns, boilers, and turbines
  • Chemical processing involving nitric acid or ammonia
  • Processes requiring high-efficiency NOₓ reduction without wet scrubbing

How Does SCR Work?

In a typical SCR system, a reduced nitrogen compound—ammonia (gas or liquid) or urea—is injected into the process gas stream. This gas mixture then flows over a catalyst that accelerates the reaction, converting NO and NO₂ into nitrogen and water:

Ammonia Reaction

NH₃ + NOₓ + O₂ → N₂ + H₂O + CO₂

Urea Reaction

(NH₂)₂CO → NH₃ + HNCO

HNCO + NOₓ + O₂ → N₂ + H₂O + CO₂

Optimized Performance Across a Wide Temperature Range

The catalyst enables these reactions at temperatures between 500°F and 1000°F (260–530°C) depending on the formulation. Special configurations like ceramic honeycomb substrates are used to minimize pressure drop and facilitate replacement.
SCR catalyst

Key Features of MXD SCR Systems
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At Branch Environmental, we custom design and engineer systems with your goals in mind.

Guaranteed Performance Tailored To Your Application

Various Material Options For Any Operating Condition

Complete Packages Including: Controls, Fans, Pumps & More

Scalable Designs To Fit Your Manufacturing Needs

Let’s Build the Right System for You

Not sure if SCR is the best fit? Our engineers will evaluate your process to determine whether catalytic reduction or wet scrubbing is the most efficient and cost-effective solution.

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