Improved ceramic catalytic filters

The partnership combines the expertise and knowhow of Topsoe’s position within catalysis and Unifrax’ strengths within fiber filter manufacturing and filtration. The TopFrax technology offers improved catalytic filters to the global market, providing high quality, well-engineered products and technical support to customers in a broad range of industries such as glass, cement, bio mass, waste incineration and metal production.

Global regulations have reduced the permissible levels of particulate and hazardous gas emissions, making compliance costly and requiring companies to make substantial investments in pollution control technologies. The company's have worked closely to develop a unique technology that addresses the problems related to industrial emissions. The TopFrax catalytic filter candle is designed to remove NOx and particulate matter, and will also be launched in a version capable of removing VOC, CO and dioxin that are generated in many industrial processes.

Key features of these filters include: high efficiency filtration of particulate matter (+99%), NOx removal efficiency (+95%), low ammonia slip and filter porosity above 80%. TopFrax filters have a temperature use limit of 400°C (750°F), are compatible with sorbents, non-combustible and corrosion resistant.

These innovative, high quality candle filters give equipment builders and customers a unique technology combining the removal of NOx, VOC, CO, dioxin and particulate matter in one integrated process. Designing pollution control equipment around the hot gas filters saves CAPEX and OPEX and reduces the footprint of the installation while providing extended service life and energy savings.

“The TopFrax product line is the first in the world to introduce a combined process for removal of NOx, VOC, CO, dioxin and particulate matter enabling customers to meet increasingly stringent regulations in a cost effective way. The partnership offers exciting possibilities for both parties, not only in terms marketing the new catalytic candle filters, but also in developing other products together in the future,” says Bjerne S. Clausen, CEO, Haldor Topsoe A/S.

David E. Brooks, President & CEO, Unifra, comments: “Unifrax is proud to partner with Haldor Topsoe, a world leader in developing catalysts to solve a range of emission control problems. The commercialisation of TopFrax filter candles is in alignment with our company mission of helping customers reduce emissions and save energy. The partnership will help both companies better serve the customer by providing access to a complete hot gas filter portfolio and extensive product support worldwide.”