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High-Surface-Area Catalyst Support for Advanced Reactions
Sepiolite's combination of high specific surface area (240 m²/g), thermal stability to 500°C, and tuneable surface chemistry makes it an outstanding catalyst support and carrier material. Researchers and industrial chemists use sepiolite to anchor metal nanoparticles, enzymes, and organocatalysts — achieving high dispersion, long catalyst life, and easy recovery in reactions ranging from petrochemical hydrogenation to pharmaceutical synthesis.
With 240 m²/g of BET surface area and a unique channel structure, sepiolite provides abundant anchoring sites for catalytic metals (Pt, Pd, Ni, Cu, Fe). This produces high metal dispersion, small particle sizes, and maximised catalytic activity per gram of metal.
Unlike organic supports that decompose above 200°C, sepiolite maintains its structure and catalytic metal dispersion at temperatures up to 500°C. This enables use in high-temperature reactions such as Fischer-Tropsch synthesis, methane reforming, and catalytic combustion.
Sepiolite's surface can be modified through acid activation (increasing surface area to 400+ m²/g), organofunctionalisation (adding selectivity), or metal impregnation. This versatility allows optimisation for virtually any catalytic application.
The mild, neutral surface of sepiolite is ideal for immobilising enzymes for biocatalysis. Lipases, laccases, and proteases retain high activity when adsorbed onto sepiolite, enabling reuse across multiple reaction cycles.
Sepiolite-supported catalysts are used for automotive exhaust treatment (NOx reduction), industrial VOC destruction, and photocatalytic water purification. The mineral's inertness ensures the catalyst works without unwanted side reactions.
The fibrous morphology of sepiolite creates a self-filtering catalyst bed. After reaction, catalyst-loaded sepiolite settles rapidly and can be recovered by simple filtration — reducing precious metal losses and simplifying process design.
High-purity sepiolite is selected and processed to remove accessory minerals that could poison catalytic reactions.
Treatment with dilute HCl increases surface area from 240 to 400+ m²/g by dissolving internal magnesium, creating additional micropores.
Catalytic metals are deposited by wet impregnation, ion exchange, or precipitation methods. Loading and dispersion are verified by XRD, TEM, and BET analysis.
The loaded catalyst is calcined at controlled temperature to fix the metal phase, remove residual precursors, and activate the catalyst.
Activity, selectivity, and lifetime are tested in laboratory reactors before production-scale quantities are released.
| Parameter | Value |
|---|---|
| BET Surface Area | 240 m²/g (natural), 400+ m²/g (activated) |
| Thermal Stability | Up to 500°C structural retention |
| Pore Volume | 0.4–0.6 cm³/g |
| Metal Loading Capacity | 1–20 wt% depending on metal |
| Particle Size | <75µm (standard), custom available |
| Impurities | SiO₂ dominant, low Fe/Al |
| Packaging | 25kg bags / sample jars |
Virtually any catalytic metal can be deposited on sepiolite. The most common are nickel, palladium, platinum, copper, iron, cobalt, and zinc. We have experience with mono-metallic, bi-metallic, and tri-metallic catalyst systems.
Sepiolite offers comparable surface area to gamma-alumina but with superior metal anchoring due to its channel structure. It is cheaper than synthetic silicas, more thermally stable than most carbon supports, and provides the unique advantage of built-in filtration through its fibrous morphology.
We can supply sepiolite in various forms: raw, purified, acid-activated, and surface-modified. For metal-loaded catalysts, we partner with catalyst manufacturers and can facilitate the development process, but we do not currently offer finished loaded catalysts as a standard product.
Sepiolite powder is best suited for slurry reactors and batch processes. For fixed-bed systems, we offer pelletised sepiolite (3–5mm extrudates) that provides adequate flow-through characteristics while maintaining high surface area.
Yes. We maintain a database of published research on sepiolite catalysis and can provide application-specific literature reviews. Our technical team collaborates with university research groups and can facilitate joint development projects.
Our technical team provides samples, specifications, and formulation guidance tailored to your industry needs.
