A Low-Cost Dual Layer Deca-Dodecasil 3 Rhombohedral-Alumina Hollow Fiber for CO2/CH4 Separation

Abstract

Membrane technology offers solutions for separation of complex gas mixtures. Therefore, new efficient and durable membranes are required to produce gas permeation modules with high area/volume for CO 2 removal from natural gas. This study aims to develop cost-effective zeolite DD3R alumina composite hollow fibers to achieve these process requirements. A porous hollow fiber support from low-cost alumina was prepared via phase inversion followed by thermal treatment. DD3R zeolite seeds were then implanted over the surface of the microporous hollow fibers to form a selective layer by hydrothermal synthesis. The thickness of the selective layer was controlled by the seed concentration, which also affected the crystal intergrowth and competing zeolite phase formation, Sigma-2, which influenced the membrane performance. A reduced-diameter composite DD3R-alumina hollow fiber was obtained with a selectivity of 203 and a CO 2 permeance of 5.4 x 10 -8 mol m −2 s −1 Pa −1 at a pressure of 2 bar.

Dynamic Deposition of PDA on a Hollow Fiber Ceramic Membrane for Oily Water Treatment

“…Alumina microfiltration hollow fiber membranes were produced through phase inversion and sintering based on the methodology used by Barbosa et al The dope mixture was formed by dissolving the polymers in a solvent under high-speed mechanical stirring. Alumina powder was gradually added, and the mixture was stirred for 48 h to ensure proper dispersion.…”