The project investigated the synthesis, scaling and performance of zeolite and carbon membranes for the separation of water from hydrogen and methane. Zeolite membranes were based on the CHA framework, produced by several hydrothermal routes. A template‑free synthesis used a 0.02 mol Si/0.7 mol Al feed at 24 °C for 24 h, while a templated approach employed 0.05 mol Si/0.2 mol Al with 0.1 mol K and 96 h at 160 °C. Seeded growth used 0.4 mol Si/0.78 mol Al for 24 h, and a fluoride medium required 0.4 mol Si/0.78 mol Al with 0.3 mol F for 96 h. All membranes were deposited on single‑channel ceramic tubes and characterized by X‑ray diffraction, Raman spectroscopy, SEM and TEM. The resulting CHA membranes exhibited high selectivity for water over hydrogen and methane. At 10 bar feed and 120 °C the water‑to‑methane selectivity reached 60 for the Chabasit membrane and exceeded 100 for the NaA membrane. For water‑to‑hydrogen separation the CHA membranes achieved a selectivity of more than 1200 at 10 bar and 150 °C, while the carbon membranes delivered an essentially infinite selectivity because no measurable methane passed at 10 bar and 120 °C. Permeability values for water ranged from 600 to 3000 L (m² h bar)⁻¹, depending on temperature and membrane type. The carbon membranes were fabricated by dip‑coating a polymer precursor onto the inner surface of the tubes, followed by drying, thermal cross‑linking and pyrolysis in an inert atmosphere. The resulting carbon layer was 200–1000 nm thick and provided excellent separation performance. Gas‑dehydration tests at 10 bar and 120 °C showed that the carbon membranes could remove water from hydrogen streams with a selectivity exceeding 1200, while the NaA and SAPO‑34 membranes achieved selectivities of 100 and 60, respectively. The project also scaled the carbon membranes to a length of 500 mm and the zeolite membranes to 250 mm, demonstrating that the fabrication process is compatible with larger‑scale production. The scaling effort involved maintaining uniform coating thickness and membrane integrity over the extended length, and the performance of the 500 mm carbon membranes remained comparable to the laboratory‑scale samples. The research was carried out in collaboration with the Institute for Chemical Technology (IKTS) and the Department of Chemical Engineering (DBI). IKTS supplied the carbon membrane fabrication facilities and performed the large‑scale coating and pyrolysis, while DBI provided the gas‑dehydration test rigs and analytical instrumentation. The project’s outcomes provide a foundation for industrial application of zeolite and carbon membranes in hydrogen purification and natural‑gas processing, offering high selectivity and robust performance under realistic operating conditions.