Patent ID: 8840711

Claim:
A modular element, comprising; i) a high-temperature stable main body; ii) the high-temperature stable main body including at least one metallic or ceramic plate, which has at least one through-going aperture for the insertion of a ceramic capillary membrane and a thickness of 0.5 to 50 mm; and iii) at least one potting in the form of a sufficiently gas-tight and high-temperature stable joint between the metallic or ceramic plate and the at least one ceramic capillary membrane, wherein the at least one through-going aperture of the at least one metallic or ceramic plate has an extension for accommodating the sufficiently gas-tight and high-temperature stable joint on at least one side of the metallic or ceramic plate, with the through-going aperture being of a cross-sectional area of 1.2 to 2.9 times the cross-sectional area of the ceramic capillary membrane and the extension being of a cross-sectional area of 2.5 to 20 times the cross-sectional area of the ceramic capillary membrane, and the sufficiently gas-tight and high-temperature stable joint being introduced only into the respective extension of the through-going aperture and not forming a continuous layer on the at least one metallic or ceramic plate.