Mixed matrix membrane (MMM) and method of H2/CO2 gas separation by using MMM

US11878267B2 · kind B2 · utility

Assignee

• NANJING TECH UNIVERSITY · CN

Inventors

• Gongping Liu · Atlanta, US
• Guining Chen · 安丰镇, CN
• Wanqin Jin · 安丰镇, CN

Key dates

• Filing date: Feb 6, 2023
• Grant date: Jan 23, 2024
• Expiry date: Feb 6, 2043

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02C20/40
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

M(SiF6)(pyz)3 (M=Cu, Zn, Co, or Ni) has a pore size between a size of H2 and a size of CO2, and thus exhibits prominent screening performance for H2/CO2. A strong interaction between Cu(SiF6)(bpy)2 and a CO2 molecule can hinder the transport of the CO2 molecule. The above two MOFs both can achieve the H2/CO2 separation. By preparing a dense MSiF6/polymer layer, MSiF6 is uniformly dispersed in the polymer and is fixed, and subsequently, MSiF6 is converted into M(SiF6)(pyz)3 or Cu(SiF6)(bpy)2 by interacting with an organic ligand. Through vapor-induced in-situ conversion, MOF particles can be well dispersed without interface defects between the MOF particles and the polymer. Even at a doping amount of 80%, the mechanical flexibility and stability of the MMM can still be retained.