公开(公告)号：US20250083098A1

公开(公告)日：2025-03-13

申请号：US18960001

申请日：2024-11-26

Applicant: NGK INSULATORS, LTD.

Inventor： Koh KOBAYASHI ,  Aya MIURA

IPC: B01D53/22 ,  B01D71/02

Abstract: A method of operating a separation apparatus using a separation membrane includes a step of performing a normal operation for supplying a mixed gas containing a plurality of types of gases to a separation membrane at a constant set pressure, to thereby separate a substance in the mixed gas, which has high permeability through the separation membrane, from any other substance and a step of performing a high pressure treatment for supplying the mixed gas to the separation membrane at a pressure higher than the set pressure at the time of starting supply of the mixed gas to the separation membrane before the normal operation or in the middle of the normal operation.

公开(公告)号：US20230084665A1

公开(公告)日：2023-03-16

申请号：US18052973

申请日：2022-11-07

Applicant: NGK Insulators, Ltd.

Inventor： Katsuya SHIMIZU ,  Koh KOBAYASHI ,  Kenichi NODA ,  Makiko ICHIKAWA ,  Naoto KINOSHITA

IPC: B01D71/02 ,  B01D53/22 ,  B01D69/10 ,  B01D67/00

Abstract: A separation membrane complex includes a porous support and a separation membrane formed on the support. The separation membrane has a small void. A small void index Ik expressed by (Σ(Sk1.5))/(Sm1.5) and indicating the abundance ratio of small voids is higher than or equal to 10×10−15, and a large void index Ip expressed by (Σ(Sp2))/(Sm2) and indicating the abundance ratio of large voids is lower than 200×10−22, where Sm is the surface area of the separation membrane, Sk is the area per small void, and Sp is the area per large void. Accordingly, the separation membrane complex can achieve a high separation ratio.