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

• Published in: Materials research (São Carlos, São Paulo, Brazil) Vol. 27
• Main Authors: Barbosa, Renan Fraga, Habert, Alberto Claudio, Borges, Cristiano Piacsek
• Format: Journal Article
• Language: English; Portuguese
• Published: ABM, ABC, ABPol 2024; Associação Brasileira de Metalurgia e Materiais (ABM); Associação Brasileira de Cerâmica (ABC); Associação Brasileira de Polímeros (ABPol)
• Subjects: Alumina Hollow fiber; CO2-CH4 separation; DD3R zeolite membrane; ENGINEERING, CHEMICAL; MATERIALS SCIENCE, MULTIDISCIPLINARY; METALLURGY & METALLURGICAL ENGINEERING; Molecular sieving; Alumina Hollow fiber; Molecular sieving; DD3R zeolite membrane; CO2-CH4 separation
• ISSN: 1516-1439; 1980-5373; 1980-5373
• DOI: 10.1590/1980-5373-mr-2023-0430

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 CO2 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 CO2 permeance of 5.4 x 10-8 mol m−2 s−1 Pa−1 at a pressure of 2 bar.