Metal Substrates

Why Metal Substrates Are Ideal for VOC and NOx Control Applications

In many plants, dealing with VOCs and NOx is part of daily operations. A lot of people focus on the catalyst itself, but the metal substrate underneath plays a huge role in making the system actually work. It keeps gases flowing evenly, which makes the catalyst much more effective.

Compared to ceramic alternatives, a metal substrate takes heat and mechanical stress a lot better. In boilers, chemical reactors, or incinerators, where temperatures swing and vibrations are common, metal substrates stay intact. That stability ensures gas passes through smoothly, letting the catalyst do its job without uneven spots or hotspots.

For VOC treatment, the metal substrate helps the gas reach the right temperature faster, so the catalyst activates sooner. Its channels guide the flow evenly, reducing leftover hydrocarbons. With NOx, the metal can handle high temperatures and repeated regeneration cycles without warping—something ceramic sometimes struggles with.

Another thing we notice on-site: metal substrates are easier to maintain. Even if the catalyst layer wears out, the metal core can often be cleaned and recoated. That keeps downtime low and saves on replacement costs.

Design-wise, engineers can tweak cell size, wall thickness, or shape to suit different reactors or flow rates. This helps balance pressure drop with surface area, giving the best performance for each system.

Bottom line: the metal substrate isn’t just a support—it’s a key part of why industrial waste gas systems run efficiently and reliably. Its toughness, thermal stability, and easy maintenance make it a favorite in emission control setups.