Synthesis and pervaporation performance of highly reproducible zeolite T membranes from clear solutions

Spreading-wetting method for highly reproducible tertiary growth of perfective bilayer TS-1 membranes

“…Finding an appropriate route in synthesis and activation procedures is key to obtain a perfective TS-1 membrane. A reported practical synthesis/activation process for the membrane has claimed simplicity and high reproducibility [6,7]. It is subjected to surface science concerning the growth of the TS-1 on a support [8].…”

Preparation of Zeolite T Membranes by a Two-Step Temperature Process for CO2 Separation

“…26 The above results repeatedly indicate that synthesis temperature and crystallization time are the most important variable factors, which strongly affect the zeolite membrane growth and permeation performance. 16,17,[21][22][23]35,36 It also suggested that it was difficult to control the crystal growth at lower temperature or higher temperatures during the second-step and to subsequently form dense zeolite T layers on a seeded support surface under such synthesis conditions in this work.…”

“…Compared with the conventional hydrothermal synthesis at a constant temperature (one-step), the two-step temperature process could control the crystal size and size distribution of ZSM-5 zeolite 32 and rapidly grow a thin and dense MFI-type membrane. 35,36 Recently, we prepared zeolite T membranes using a clear aluminosilicate solution or a fluoride media 20,21,23,24 and the two-step method. 22 These membranes showed high selectivity for water/organic mixture separation by pervaporation and high reproducibility.…”

“…The zeolite T membrane has been developed as a novel membrane material for CO 2 separation for the past decade. − With a Si/Al ratio of 3–4, zeolite T is an intergrowth-type zeolite of erionite and offretite, showing both hydrophilic and fairly high acid resistant properties. − The frameworks of erionite and offretite are different but closely related. The offretite framework has two types of channels, i.e., 12-ring main channels parallel to the c axis and eight-ring subchannels normal to the c axis, of which the pore sizes are 0.67 nm × 0.68 and 0.36 nm × 0.49 nm, respectively.…”

Design and Synthesis of Acid‐resistant Zeolite T/NaY Composite Membrane for Water/Ethanol Separation

“…Features of simple process, easy operation, and low energy consumption give this process a huge advantage for separating azeotropic or closeboiling mixture solutions. [21][22][23][24] Among them, NaA zeolite membrane's synthesis and application has been widely reported. [5][6][7] In addition, zeolite membranes are the best target for membrane reactor due to their high thermal and chemical stability.…”