Ngk Insulators, Inc.

Jgc Corporation

Ngk Insultators, Ltd.

Makoto Miyahara

Makiko Ichikawa

Kenichi Noda

Takeshi Hagio

Kenji Yajima

Katsuya Shimizu

Hideyuki Suzuki

Makoto Teranishi

Shinji Nakamura

Tetsuya Uchikawa

Naoto Kinoshita

Takahiro Ishikawa

Masayuki Shinkai

Shuhei Ishikawa

Hiroyuki Shibata

Aya Miura

Ryotaro Yoshimura

Nobuaki Nakayama

Ryujiro Nagasaka

Hiroaki Hasegawa

Naoko Inukai

Seiji Yasui

Makiko Niino

Katsuhiro Tokura

Shuichi Oguro

Keiichi Nishida

Aiko Matsuyama

Naoko Takahashi

Kazuyoshi Inoue

Akiko Fukuta

Kenjii Yajima

Yasushi Fujimora

A zeolite membrane composite includes a porous support and a zeolite membrane formed on the support. The zeolite membrane includes a low-density layer that covers the support, and a compact layer that covers the low-density layer. The compact layer has a higher content of a zeolite crystalline phase than the low-density layer. By in this way forming the compact layer on the low-density layer that covers the support, the thin compact layer with no defects can be formed more easily than in the case where a compact layer is formed directly on a support.

Zeolite membrane composite, method of producing zeolite membrane composite, and separation method

A dehydration method is a dehydration method for selectively separating water from a mixture that contains water, and the method includes a step of supplying the mixture to a supply side space of a separation membrane, and a step of making a pressure difference between the supply side space and a permeation side space of the separation membrane. The separation membrane includes a first zeolite membrane that faces the permeation side space and is constituted by a first zeolite and a second zeolite membrane that faces the supply side space and is adjacent to the first zeolite membrane. The second zeolite membrane is constituted by a second zeolite that has the same framework structure as framework of the first zeolite and has a lower Si/Al atom ratio than a Si/Al atom ratio of the first zeolite.

Dehydration method and dehydration apparatus providing increased water permeation

A crystalline material contains oxygen, aluminum and phosphorus, and has powder X-ray diffraction peaks shown below. When the peak at 2θ=14.17±0.2° is used as the reference peak and the intensity of the reference peak is set to 100, for example, the relative intensity of the peak at 2θ=8.65±0.2° is 1 to 15. The relative intensity of the peak at 2θ=9.99±0.2° is 1 to 15. The relative intensity of the peak at 2θ=16.52±0.2° is 5 to 80. The relative intensity of the peak at 2θ=17.37±0.2° is 1 to 15. The relative intensity of the peak at 2θ=21.81±0.2° is 10 to 80.

Crystalline material and membrane complex

A zeolite membrane complex includes a longitudinal support member having at least one through hole extending along its length and a zeolite membrane on an inner peripheral surface of the through hole or over an outer peripheral surface of the support, from one end portion of the support to the other end portion thereof. Among constituent elements of the zeolite membrane except oxygen, an element with the highest percentage is a main element, and when the concentration of the main element is measured at three portions defined by dividing the support into three equal parts in the longitudinal direction, the concentration of the main element gradually decreases from the one end portion toward the other end portion, and the ratio of the concentration of the main element at the other end portion to that at the one end portion is 0.90 or more.

Zeolite membrane complex, method of producing zeolite membrane complex, and hydrothermal synthesis apparatus

A method for manufacturing a zeolite membrane structure comprises an immersion step for immersing a porous substrate in a synthetic sol, and a synthesis step for hydrothermally synthesizing a zeolite membrane on a surface of the porous substrate that has been immersed in the synthesis so. When the foamability of the synthetic sol is measured by a Ross-Miles method under a condition of 25 degrees C., the foam height after elapse of 5 minutes from completion of down flow is less than or equal to 5 mm.

Method for manufacturing zeolite membrane structure

A zeolite membrane complex includes a porous support, and a zeolite membrane formed on the support. The zeolite membrane includes a zeolite crystal phase constituted by a plurality of zeolite crystals, and a dense grain boundary phase, which is a region between the plurality of zeolite crystals. A density of at least part of the grain boundary phase is smaller than a density of the zeolite crystal phase. A width of the grain boundary phase is 2 nm or more and 10 nm or less. Accordingly, it is possible to realize high permeability and high separating performance, and high durability of the zeolite membrane.

Zeolite membrane complex, method for producing zeolite membrane complex, and separation method

A support is a porous ceramic support for supporting a zeolite membrane. The hydraulic conductivity of the support is less than or equal to 1.1&#xd7;10m/s. In the support, the total content of alkali metal and alkaline earth metal in a surface part within 30 &#x3bc;m from a surface in a depth direction perpendicular to the surface is less than or equal to 1% by weight.

Ceramic support, zeolite membrane complex, method of producing zeolite membrane complex, and separation method

A method for inspecting a separation membrane structure includes an assembly step of sealing a separation membrane structure that includes a porous substrate and a separation membrane into a casing, and an inspection step of applying pressure to an inspection liquid that has filled a first main surface side of the separation membrane.

Method for inspecting separation membrane structure, method for manufacturing separation membrane module, and method for manufacturing separation membrane structure

In production of a zeolite membrane complex, a starting material solution containing at least a structure-directing agent and FAU-type zeolite particles having an average particle diameter of 50 to 500 nm is prepared. Then, a support is immersed in the starting material solution to form a zeolite membrane on the support by hydrothermal synthesis, the zeolite membrane being composed of AFX-type zeolite. After that, the structure-directing agent in the zeolite membrane is removed.

Method of producing zeolite membrane complex and zeolite membrane complex

A separation membrane structure has partition walls including a honeycomb shaped porous ceramic body provided with a large number of pores, and cells to become through channels of a fluid are formed by the partition walls. The cells include separation cells and slit cells. In the separation cells, the intermediate layer is disposed on the surface of a substrate, and a separation layer is further formed. The intermediate layer has a structure where aggregate particles are bonded to one another by an inorganic bonding material having a thermal expansion coefficient equal to or higher than that of the aggregate particles.

Honeycomb shaped porous ceramic body, manufacturing method for same, and honeycomb shaped ceramic separation membrane structure

A dehydration method is a dehydration method for selectively separating water from a mixture that contains water, using a zeolite membrane having an AFX structure, and the method includes a step of supplying the mixture to a supply side space of the zeolite membrane having an AFX structure, and a step of making a pressure difference between the supply side space and a permeation side space of the zeolite membrane having an AFX structure.

Dehydration method, dehydration apparatus, and membrane structure

A peak intensity of a (002) plane is greater than or equal to 0.5 times a peak intensity of a (100) plane in an X-ray diffraction pattern obtained by irradiation of X-rays to a membrane surface of the ERI membrane.

ERI-structure zeolite membrane and membrane structure

An aluminophosphate-metal oxide bonded body including a metal oxide having a bonding surface on a part of the surface thereof, and aluminophosphate that is disposed on the bonding surface of the metal oxide, wherein an alkali metal, an alkaline earth metal or both of these is/are disposed on the bonding surface of the metal oxide, and the content rate of the alkali metal, alkaline earth metal or both is from 0.3 to 30.0% by mass with respect to all of the substances that are disposed on the bonding surface of the metal oxide. An aluminophosphate-metal oxide bonded body that provides a favorable bonded state even for complicated shapes is provided.

Aluminophosphate-metal oxide bonded body and production method for same

Provided is a gas separation device configured to separate a non-hydrocarbon gas from a feed gas containing the non-hydrocarbon gas through use of a gas separation membrane, in which a decrease in operating rate can be suppressed, and economic efficiency is satisfactory. A first membrane module () and a second membrane module () are arranged in parallel to each other with respect to supply lines for a feed gas. Gas lines for regeneration () (()), which are branched from a permeate gas line () (()) of the membrane module () (()), and which are joined to a feed gas line () (()) configured to supply the feed gas to the membrane module () (()), are provided. Under a state in which the feed gas is supplied to the membrane module (), a permeate gas through the membrane module () is supplied, as a gas for regeneration, to the membrane module () through the gas lines for regeneration (). In this case, the membrane module () is brought into a non-operation state, and the membrane module () is regenerated.

Gas separation device

A porous support includes a base body, a supporting layer, and a topmost layer. The supporting layer is disposed between the base body and the topmost layer, and makes contact with the topmost layer. A ratio of a porosity of the topmost layer to a porosity of the supporting layer is greater than or equal to 1.08. A ratio of a thickness of the topmost layer to a thickness of the supporting layer is less than or equal to 0.9.

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Nagoya, Japan

Makoto Miyahara