摘要:
A coating membrane forming method for forming a coating membrane on an object to be coated, the method comprising the steps of: setting the object to be coated for forming a coating membrane thereon in a dipping tank; sending an application liquid for forming the coating membrane into the dipping tank to raise a liquid level of the application liquid till the top of a region for forming the coating membrane thereon in the object to be coated is immersed in the application liquid; and thereafter discharging the application liquid outside the dipping tank to lower the liquid level of the application liquid.
摘要:
A monolithic separation membrane structure (100) comprises a support body (211) and a separation membrane (300). The support body (211) is composed of a porous material and includes a plurality of through holes (TH1). The separation membrane (300) is formed in a tubular shape on an inner side of the plurality of through holes (TH1), and is used in a penetrative vaporization method or a vapor infiltration method. The helium gas permeation resistance in the support body (211) is less than 8.3 x 10 7 Pa • sec/m 2 .
摘要:
A porous carbon membrane has as a loaded component water, alcohol, ether, or ketone loaded on a surface or in a pore, or on the surface and in the pore thereof. The carbon membrane has the loaded component preferably having a molecular weight of 100 or less. The carbon membrane has the loaded component preferably being linear alcohol or linear ether. The carbon membrane has the loaded component preferably being at least one selected from methanol, ethanol, n-propanol, and n-butanol. There is provided a carbon membrane having high separation performance and little change in the separation performance with the passage of time.
摘要:
A carbon membrane laminated body includes: a porous substrate, a first porous carbon membrane as a carbon membrane underlayer disposed on a surface of the porous substrate, and a second porous carbon membrane as a carbon membrane separation layer disposed on a surface of the carbon membrane underlayer, having a smaller film thickness, and a smaller average pore diameter, compared with those of the carbon membrane underlayer. It is preferable to form the carbon membrane underlayer and the carbon membrane separation layer by carbonizing a carbon membrane underlayer precursor disposed on a surface of the porous substrate and the carbon membrane separation layer precursor disposed on a surface of the carbon membrane underlayer precursor at 400 to 1000°C in a non-oxidation atmosphere. The carbon membrane laminated body is a separation membrane excellent in both separation performance and flux when it is used as a separation membrane of a mixture.
摘要:
Provided is a separation membrane manufacturing method capable of easily manufacturing a dense separation membrane. The separation membrane manufacturing method comprises a membrane forming step of forming a separation membrane precursor 3 containing a separation membrane precursor solution on the surface of cells formed in a porous monolith substrate 1; and a drying step of performing ventilation drying by passing hot air 15 through the cells 2 having the separation membrane precursor 3 in the monolith substrate 1 to dry the separation membrane precursor 3. During the ventilation drying in the drying step, the temperature of the monolith substrate 1 having the separation membrane precursor 3 is raised to 90°C within 15 minutes from the start of the passing of the hot air 15 at such a rate of temperature rise that an average rate of temperature rise is 7°C/min or more from the start of the passing of the hot air until the temperature reaches 90°C.