Disclosed is a honeycomb member as a component that has a low risk of breaking, high chemical resistance, improved corrosion resistance and a longer service life than conventional components. For this purpose, the honeycomb member comprises first and second substantially parallel lateral faces, further comprises a honeycomb structure with a plurality of parallel ducts that adjoin each other by means of duct walls, and is made of a polytetrafluoroethylene (PTFE) polymer-based first synthetic material. The honeycomb member is provided especially for use in post-combustion systems, post-processing systems, in methods for operating same, and in methods for concentrating gas constituents. The honeycomb member is further provided especially for use in water purification plants, systems for separating settleable constituents of fluids, for use as a carrier element for a biological reaction medium, for providing sedimentation surfaces, in methods for operating a biological water purification plant, and in methods for separating settleable constituents from fluids.