Selection of the permeate water over the less polar retentate molecules (7). Hydrophilicity of the high framework charge, polar zeolite frameworks employed, and not on size ThereĪre a number of installations of zeolite-based membrane systems for dehydration separations (6),īut the mechanism for separation in these cases is based on pervaporation, which utilizes the Microporosity and where the ultimate separation mechanism is molecular size selection. (MeAPOs)/metallosilicoaluminophosphates (MeAPSOs), metal-organic frameworks (MOFs), covalent organic frameworks (COFs), and other compositions demonstrating crystalline, uniform For the purpose of our review, weįocus on crystalline zeolitic membranes, which include selective layers composed mostly of aluminosilicate and silicate zeolites, silicoaluminophosphates (SAPOs)/metalloaluminophosphates Membrane systems can also enable separations that are otherwise unfeasible, such as efficient natural gas purification on FPSO (floating production, storage,Ī particularly intriguing and promising membrane concept that has been extensively studied in industry and the academy is the zeolitic membrane. Reactor systems (1, 2), membranes are often-considered components in process intensification Operations such as thermal distillation and perhaps soon in hybridized commercial membrane As a process step replacing conventional energy-intensive unit Membranes are becoming increasingly important components for sustainable growth of process In zeolitic membrane systems are approaching commercial attractiveness,īut many significant challenges remain as competing membrane technologies are also advanced.Īn aluminosilicatebased or silicate-based The economics of implementing today’s best zeolitic membranes and the achievable improvements Activity continues unabatedĪnd has increased with the introduction of new compositions such as metalorganic frameworks and other materials to the field. Zeolitic membranes have been an active area of research for at least 25 years.Ĭontinuous and creative improvements in the materials chemistry of membrane synthesis and in the understanding and predictability of membraneĭiffusion and separations have been achieved. Zeolitic membrane, zeolite membrane, MOF membrane, process The Annual Review of Materials Research is online at New Materials Research, Honeywell UOP, Des Plaines, Illinois 60016, USA Įmail: R&D Group, Honeywell UOP, Des Plaines, Illinois 60016, USA Downloaded from Access provided by Australian National University on 07/02/18.