US 2026/0092013 A1 · PROCESS FOR PREPARING A GREEN MULTILAYER SOL-GEL CERAMIC MEMBRANE

Process for preparing a green multilayer sol-gel ceramic membrane

AssigneesPetroleo Brasileiro S.A. - Petrobras, Universidade Federal De Minas Gerais - Ufmg

InventorsDÉBORA GUIMARÃES DA SILVA, PRISCILA CRISTH FONSECA ALVES, WANDER LUIZ VASCONCELOS, DARLEY CARRIJO DE MELO, JAILTON FERREIRA DO NASCIMENTO, DANIELA CORDEIRO LEITE VASCONCELOS, LEONARDO DOS SANTOS PEREIRA

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Abstract

The present invention relates to a process for the preparation of a green multilayer sol-gel ceramic membrane for the separation of gaseous CO2 from natural gas. For being composed solely of ceramic materials (silica and alumina), the ceramic membrane developed by the proposed process has high chemical, physical and mechanical stability as its main characteristics. These characteristics ensure its usefulness in the process of separating CO2 from natural gas, even in streams having high CO2 concentrations and under high pressure; the developed membrane further enables backwashing operations to be carried out, when needed.

Claims16

Dependent claims

A process for the preparation of a green multilayer sol-gel ceramic membrane, comprising:

a) producing a tubular shaped porous ceramic support of chemical composition α-Al2O3 (1);
b) preparing and depositing the first intermediate ceramic layer of chemical composition α-Al2O3 (2);
c) preparing and depositing the second intermediate ceramic layer of chemical composition Γ-AL2O3 (3);
d) synthesizing and depositing the ceramic separation sub-layer of the green ceramic membrane, the third mesoporous SiO2 layer (4);
and
e) synthesizing and depositing the ceramic separation sub-layer of the green ceramic membrane, the fourth microporous SiO2 layer (5).

3 more elements

Dependencies are inferred from the claim text.