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Development and tests of a combined filter for NOx, particulates, and SO2 reduction

: Walberer, Julian; Giovanny, Mateus; Meiller, M.; Weih, Christoph; Hornung, Andreas


Chemical Engineering and Technology 41 (2018), Nr.11, S.2150-2158
ISSN: 0930-7516
ISSN: 1521-4125
Fraunhofer UMSICHT Sulzbach-Rosenberg ()
combined filter; emission reduction; energy from biomass; selective catalytic reduction residues

The idea of this innovative filter concept is to combine three individual flue gas technology treatment systems into one product to be more economic and efficient. The central part of the filter is a ceramic filter candle, which is used for common dust separation. The ceramic filter material is activated with modified catalysts to enable selective catalytic reduction at low temperatures (150–200 °C). To reduce acid components while simultaneously increasing dust separation, the activated filter candle surface is precoated with an absorbent. The developed filter is suitable for many applications, especially decentralized applications such as solid biomass combustion or utilization of biofuels in combined heat and power engines, which are target markets. The production of the filter material and the practical test using exhaust gas from a dual fuel engine operating with biofuels are described.