COMPACT REACTOR

The invention relates to a compact reactor consisting of a plurality of plat es arranged in a stack and spaced apart from each other, wherein a) the plates are spaced apart by spacing means and sealed relative to each other in a gas--tight manner, b) the plates have a corrugated profile, so that the corrugation troughs for m flow channels separated from each other by the corrugation crests (fins), c) the flow channels run parallel to each other and parallel to one side of the plate, d) the flow channels contain at least partially at least one catalyst materi al that is installed in such a way that gaseous and/or liquid media can flow through the flow channels, and e) the compact reactor possesses means (headers) for conducting at least two gaseous and/or liquid media to or from the flow channels. In addition, the invention relates to the use of a compact reactor. The fins between the individual flow channels of a plate are permeable to the gaseous and/or liquid medium flowing in the flow channels.