Matrix reactor and a method for producing products in said reactor

The present invention concerns a matrix reactor for reactions in which low-molecular and high-molecular reactants are involved wherein the reactor space V R contains a matrix and comprises a reaction compartment and a supply compartment, wherein the matrix is composed of a porous material which can take up low-molecular reactants and wherein the exclusion volume V 0 of the matrix is available as the reaction compartment and the matrix volume V M of the matrix is available as the supply compartment. The matrix reactor can be used for enzymatic processes, in particular for a coupled in vitro transcription/translation reaction to produce proteins.