• • The MSTP enables fabrication of HZIF-8 membranes with a single-tube area of ~200 cm² and a total area exceeding 4.6 m², marking a >20-fold increase over typical lab-scale membranes (<10 cm²) and approaching industrially relevant dimensions.
• • Extended stability tests show the HZIF-8 membranes maintain separation performance for 30 days under harsh conditions of 17 bar and 55 °C with a feed flow of 20 Nm³ d⁻¹, demonstrating operational robustness for continuous industrial use.
• • The use of tubular ceramic supports with sealed inner lumens as confined reaction spaces allows precise control over membrane formation, addressing defect control and structural uniformity issues that plague scale-up.
• • The heterostructured design of ZIF-8 membranes likely enhances mechanical stability and separation performance, as evidenced by successful operation at elevated pressures and temperatures, which is critical for petrochemical process integration.