Fe-Beta Zeolite Catalyst
Fe-Beta is the iron-exchanged form of the Beta zeolite (BEA framework), a cost-effective SCR catalyst for stationary NOx abatement. Its large-pore 12-MR 3D framework and iron redox sites deliver adequate NOx conversion at 350-600 °C with superior sulfur tolerance — the combination that makes Fe-Beta a value choice for industrial boilers, process heaters, and gas turbines where exhaust temperatures are stable and DPF regeneration does not occur.
What is Fe-Beta?
Fe-Beta is produced by iron exchange of H-Beta or NH₄-Beta. Iron occupies exchange sites in the BEA framework, providing redox-active centres for SCR chemistry. Unlike the CHA-based catalysts (Cu-SSZ-13, Fe-SSZ-13) required for mobile diesel duty, Fe-Beta’s larger pores and moderate cost suit stationary applications without extreme thermal cycling.
Applications
| Application | Why Fe-Beta |
|---|---|
| Stationary SCR (boilers, heaters, gas turbines) | Adequate NOx conversion at stable temperatures, lower cost |
| High-temperature NOx (350-600 °C) | Iron sites active across the stationary window |
| Sulfur-containing exhaust | Superior SO₂ tolerance vs Cu-exchanged forms |
| Cost-sensitive NOx abatement | Lower material cost than SSZ-13-based catalysts |
Fe-Beta vs Fe-SSZ-13 for SCR
| Property | Fe-Beta | Fe-SSZ-13 |
|---|---|---|
| Framework | BEA (12-MR 3D) | CHA (8-MR cages) |
| Pore access | Larger — less diffusion limitation | Smaller — cage confinement |
| High-temperature activity (350-600 °C) | Good | Excellent |
| Hydrothermal stability | Good | High |
| Relative cost | Lower | Higher |
| Typical duty | Stationary, moderate severity | Marine, high-sulfur, demanding stationary |
Available Grades
| Grade | SiO₂/Al₂O₃ | Fe Loading | Application |
|---|---|---|---|
| Fe-Beta-25 | 25 | 1-3 wt% | Stationary SCR, 250-500 °C |
| Fe-Beta-38 | 38 | 1-2 wt% | High-temperature stationary SCR |
Precursor H-Beta and NH₄-Beta grades are available for customers performing their own iron exchange — see the Beta zeolite product hub. For the stationary SCR selection guide, see best zeolite for SCR. When requesting a sample, specify your exhaust temperature range, fuel sulfur content, and target emission standard.
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