HYDROGEN SEPARATION MEMBRANE

• Main Authors: MATSUYAMA EMI, SAWAMURA KENICHI
• Format: Patent
• Language: English; Japanese
• Published: 09.08.2018
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a hydrogen separation membrane which maintains high permeation separation performance without causing a membrane defect such as peeling and cracking even in a usage accompanying quick heating and quick chilling.SOLUTION: A hydrogen separation membrane has a porous intermediate layer 2 which is formed with mesopores or macropores of an average fine pore size smaller than a microporous layer 1, in contact with the microporous layer 1 formed with macropores having an average fine pore size of 0.1 to 20 μm as the porous base material having a multilayer structure of at least 3 layers of different average fine pore sizes, and has a microporous layer 3 formed with micropores of an average fine pore size smaller than the porous intermediate layer 2, in contact with the porous intermediate layer 2 and allows Pd nanoparticles to be fixed to the microporous layer 3. The hydrogen separation membrane which minimizes a stress accompanied by hydrogen occlusion and release, and a thermal stress accompanied by quick heating and quick chilling, and suppresses deterioration of membrane separation performance due to peeling and cracking by virtue of granulation of Pd to nanoparticles is provided.SELECTED DRAWING: Figure 3 【課題】急熱急冷の伴う使用においても剥離・クラック等の膜欠陥を生じることなく高い透過分離性能を維持する水素分離膜の提供。【解決手段】平均細孔径の異なる少なくとも３層以上の多層構造を有する多孔質基材であって、平均細孔径０．１〜２０μｍのマクロ孔で形成されたマクロ多孔質層１に接して多孔質層１よりも平均細孔径の小さなメソ孔またはマクロ孔で形成された多孔質中間層２を有し、多孔質中間層２に接して多孔質中間層２よりも平均細孔径の小さなミクロ孔で形成されたミクロ多孔質層３を有し、ミクロ多孔質層３にＰｄナノ粒子が固定化されている水素分離膜。Ｐｄをナノ粒子化することで、水素吸蔵・放出に伴う応力及び急熱急冷にともなう熱応力を最小化し、剥離・クラックによる膜分離性能低下を抑制する水素分離膜。【選択図】図３