公开(公告)号：US20240350983A1

公开(公告)日：2024-10-24

申请号：US18757682

申请日：2024-06-28

Applicant: NGK INSULATORS, LTD.

Inventor： Kosuke NAKAGAWA ,  Kazuki IIDA ,  Hirofumi KAN ,  Atsushi TORII ,  Makoto SHIOMI ,  Yukinari SHIBAGAKI ,  Katsuya SHIMIZU

IPC: B01D69/14 ,  B01D19/00 ,  B01D53/22 ,  B01D69/02 ,  B01D71/02 ,  B01J12/00 ,  B01J19/24

CPC classification number: B01D69/145 ,  B01D19/0031 ,  B01D53/228 ,  B01D69/02 ,  B01D71/0281 ,  B01J12/00 ,  B01J19/2425 ,  B01D2325/20

Abstract: A reactor module includes a housing, and a plurality of reactors arranged about a predetermined axis in the housing. In a cross section along a radial direction perpendicular to the predetermined axis, shortest distances between the housing and the plurality of reactors are equivalent to each other.

公开(公告)号：US20230356153A1

公开(公告)日：2023-11-09

申请号：US18352377

申请日：2023-07-14

Applicant: NGK INSULATORS, LTD.

Inventor： Aya MIURA ,  Narumi TOMOKAGE ,  Azumi OTA ,  Katsuya SHIMIZU

IPC: B01D65/02 ,  B01D71/02 ,  B01D69/02

CPC classification number: B01D65/02 ,  B01D71/0281 ,  B01D69/02 ,  B01D2325/12 ,  B01D2323/081 ,  B01D2321/32

Abstract: A membrane heat treatment method includes a process of raising the temperature of a membrane to an intermediate heating temperature (step S21), a process of heating and keeping the membrane at the intermediate heating temperature (step S22), a process of raising the temperature of the membrane to a main heating temperature higher than the intermediate heating temperature (step S23), and the process of heating and keeping the membrane at the main heating temperature (step S24). A first recovery amount R1 that is a difference in permeability of the membrane between after step S22 and before step S21 is 50% or more and 95% or less of a second recovery amount R2 that is a difference in permeability of the membrane between after step S24 and before step S21.

公开(公告)号：US20200009509A1

公开(公告)日：2020-01-09

申请号：US16572786

申请日：2019-09-17

Applicant: NGK INSULATORS, LTD.

Inventor： Takeshi HAGIO ,  Kenichi NODA ,  Makoto MIYAHARA ,  Katsuya SHIMIZU

IPC: B01D67/00 ,  C01B39/54 ,  B01D71/02

Abstract: A method of synthesis for an aluminophosphate-based zeolite membrane includes a steps of preparing a mixed solution with a pH greater than or equal to 6 and less than or equal to 9 by mixing an acidic phosphorous source with an alkali source, a steps of preparing a starting material solution by adding and mixing an aluminum source to the prepared mixed solution, and a steps of synthesizing an aluminophosphate-based zeolite membrane by hydrothermally synthesizing the starting material solution.

公开(公告)号：US20240100474A1

公开(公告)日：2024-03-28

申请号：US18524431

申请日：2023-11-30

Applicant: NGK INSULATORS, LTD.

Inventor： Ko KOBAYASHI ,  Katsuya SHIMIZU ,  Aya MIURA ,  Kenichi NODA

IPC: B01D53/22 ,  B01D69/04 ,  B01D71/02

CPC classification number: B01D53/228 ,  B01D69/043 ,  B01D71/0281 ,  B01D2053/221 ,  B01D2256/10 ,  B01D2257/504

Abstract: A mixed gas separation method includes a step of supplying a mixed gas to the separation membrane and causing a gas with high permeability in the mixed gas to permeate through the separation membrane. In the step, when ΔP is a difference between a gas pressure on the primary side of the separation membrane, i.e., a feed pressure, and a gas pressure on the secondary side of the separation membrane, i.e., a permeate pressure, and A is a Joule-Thomson coefficient, a difference ΔT between a gas temperature on the primary side of the separation membrane, i.e., a feed temperature, and a gas temperature on the secondary side of the separation membrane, i.e., a permeate temperature, is made less than 90% of A·ΔP by setting the Nu number in the mixed gas to be greater than or equal to 2 and less than or equal to 10.

公开(公告)号：US20230026226A1

公开(公告)日：2023-01-26

申请号：US17931925

申请日：2022-09-14

Applicant: NGK Insulators, Ltd.

Inventor： Katsuya SHIMIZU ,  Makiko ICHIKAWA ,  Kenji YAJIMA

IPC: B01D53/22 ,  B01D71/02 ,  B01D69/10 ,  B01J20/18 ,  B01J20/28 ,  C07C7/144

Abstract: A gas separation method includes supplying a mixed gas to a zeolite membrane complex and permeating a high permeability gas through the zeolite membrane complex to separate the high permeability gas from other gases. The mixed gas includes a high permeability gas and a trace gas that is lower in concentration than the high permeability gas. The molar concentration of a first gas included in the trace gas in the mixed gas is higher than the molar concentration of a second gas included in the trace gas in the mixed gas. The adsorption equilibrium constant of the first gas on the zeolite membrane is less than 60 times that of the high permeability gas. The adsorption equilibrium constant of the second gas on the zeolite membrane is 400 times or more that of the high permeability gas.

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.

公开(公告)号：US20230018523A1

公开(公告)日：2023-01-19

申请号：US17931918

申请日：2022-09-14

Applicant: NGK Insulators, Ltd.

Inventor： Katsuya SHIMIZU ,  Makiko ICHIKAWA ,  Kenji YAJIMA

IPC: B01J20/18 ,  B01D53/04 ,  B01J20/28 ,  B01D53/62

Abstract: A gas separation method includes supplying a mixed gas to a zeolite membrane complex and permeating a high permeability gas through the zeolite membrane complex to separate the high permeability gas from other gases. The mixed gas includes a high permeability gas and a trace gas that is lower in concentration than the high permeability gas. The trace gas contains an organic substance whose molar concentration in the mixed gas is higher than or equal to 1.0 mol %. The adsorption equilibrium constant of the organic substance on the zeolite membrane is less than 150 times the adsorption equilibrium constant of the high permeability gas.

公开(公告)号：US20240325969A1

公开(公告)日：2024-10-03

申请号：US18738374

申请日：2024-06-10

Applicant: NGK INSULATORS, LTD.

Inventor： Kosuke NAKAGAWA ,  Kazuki IIDA ,  Hirofumi KAN ,  Atsushi TORII ,  Makoto SHIOMI ,  Yukinari SHIBAGAKI ,  Katsuya SHIMIZU

IPC: B01D53/22

CPC classification number: B01D53/229 ,  B01D2053/221 ,  B01D2257/80 ,  B01D2311/106 ,  B01D2313/041 ,  B01D2313/22

Abstract: A membrane module includes a housing, a membrane structure housed in the housing, a sealing portion configured to seal a gap between the housing and the membrane structure, and a cooling portion configured to cool a portion of the housing in contact with the sealing portion.

公开(公告)号：US20230073866A1

公开(公告)日：2023-03-09

申请号：US18045485

申请日：2022-10-11

Applicant: NGK INSULATORS, LTD.

Inventor： Takahiro NAKANISHI ,  Katsuya SHIMIZU ,  Naoto KINOSHITA ,  Makiko ICHIKAWA

IPC: B01D65/00 ,  B01D63/06 ,  B01D71/02

Abstract: A separation membrane module includes a separation membrane complex having a support and a separation membrane provided on the support, a housing container for housing the separation membrane complex, and a sealing member existing between a supporting surface provided inside the housing container and a supported surface of the separation membrane complex, being in close contact with the supporting surface and the supported surface. A first static friction coefficient between the sealing member and the supported surface and/or a second static friction coefficient between the sealing member and the supporting surface are/is not higher than 0.5. A value obtained by multiplying the first static friction coefficient and/or the second static friction coefficient by a compressive force [N] of the sealing member and dividing the product by a mass [kg] of the separation membrane complex is larger than 0.7.

公开(公告)号：US20200001229A1

公开(公告)日：2020-01-02

申请号：US16564196

申请日：2019-09-09

Applicant: NGK INSULATORS, LTD.

Inventor： Katsuya SHIMIZU ,  Makiko Ichikawa ,  Kenji Yajima ,  Takeshi Hagio

IPC: B01D53/22 ,  B01D63/06 ,  B01D65/10

Abstract: A method for inspecting a separation membrane module has a sealing step for sealing a gas for inspection on a primary side of zeolite membrane. The dynamic molecular diameter for the gas for inspection is greater than 1.07 times the pore diameter in the zeolite membrane. The gas for inspection has the characteristic of having a rate of reduction for a CO2 gas permeation rate in the zeolite membrane of less than 10% when a separation membrane structure is allowed to stand for 60 minutes in the gas for inspection at 25 degrees C. and 0.1 MPaG.