Reactor assembly

The invention relates to a reactor assembly for analyzing the effluent streams from a plurality of flow-through reactors, comprising: - a plurality of flow-through reactors for performing chemical reactions, each reactor comprising: - a reaction chamber (1), comprising a reaction zone (2), the reaction chamber being connected to - at least one reactor inlet (3) for at least one reactant, upstream of the reaction zone, - at least one reactor outlet (4) for the effluent stream from the reaction zone, downstream of the reaction zone, - a housing comprising a base block and a cover element, wherein the base block (5) comprises a plurality of first channels (6), each first channel accommodating a flow-through reactor and a second sealing element (12), arranged between the outside of the reactor and the inner wall of the fist channel, wherein the reactor assembly further comprises: - at least one analyzer for subjecting the effluent stream to an analyzing procedure, each reactor outlet being connected to at least one analyzer by an effluent conduit, and - at least one dilution gas supply means (16), for adding at least one dilution gas to the effluent stream, downstream of the reaction zone, characterized in that, a space (14) is present in each first channel between the outer wall of the reactor and the inner wall of the first channel and below the second sealing element (12), and in that the base block comprises fourth channels, each fourth channel being connected to a first channel and opening in said space (14) in that first channel below the second sealing element and above the reactor outlet for adding a dilution gas to the effluent stream of the reactor arranged in said first channel.