Korea University Research and Business Foundation

Eunhee Jang

Jungkyu Choi

Kwan-Young Lee

Jinseong Kim

Kwan Young Lee

Hwiyoon Noh

Layoung Choi

Disclosed are a hydrocarbon adsorption and desorption complex including zeolite with a controlled cation type and a preparation method therefor. The hydrocarbon adsorption and desorption complex exhibits excellent hydrocarbon adsorption and oxidation performance even at a temperature lower than a catalyst activation temperature by controlling the distribution of metal ions and metal oxides, and also exhibits excellent hydrocarbon adsorption and oxidation performance even in the presence of water, by being prepared through hydrothermal treatment.

Hydrocarbon adsorption and desorption complex comprising zeolite with controlled cation and preparation method therefor

Disclosed are a hydrocarbon adsorption and desorption complex that reduces emission of hydrocarbon from vehicle exhaust gas and improves hydrothermal stability of a device, and a method for preparing the same. The hydrocarbon adsorption and desorption complex may have improved adsorption ability of the hydrocarbon as metal ions are bound to a gas adsorbing portion containing aluminum, and may have improved hydrothermal stability as a reinforcing portion made of silica is formed on a surface of the gas adsorbing portion.

Hydrocarbon adsorption and desorption complex including gas adsorbing portion and reinforcing portion and method for preparing the same

Disclosed are a hydrocarbon adsorption and desorption complex showing hydrocarbon adsorption and oxidation performance by controlling the cation ratio in zeolite, and a preparation method therefor. The hydrocarbon adsorption and desorption complex controls a cation ratio to exhibit the excellent hydrocarbon adsorption ability and oxidation performance even at a temperature lower than the catalyst activation temperature, and increases hydrothermal stability of the hydrocarbon adsorption and desorption complex through hydrothermal treatment to exhibit the excellent hydrocarbon adsorption and desorption performance even in a situation where water is present at a high temperature.

Hydrocarbon adsorption and desorption complex comprising zeolite with controlled cation ratio and preparation method therefor

The present invention relates to a method of fabricating an organic structure directing agent-free CHA type zeolite membrane and a membrane fabricated thereby, and more particularly to a method of fabricating a continuous CHA type zeolite membrane, which exhibits CO/Nand CO/CHseparation performances comparable with those of conventional membranes, in a cost-effective manner without a calcination process by hydrothermal synthesis using an alkali metal hydroxide without using an organic structure directing agent, and to a membrane fabricated thereby.

Method of fabricating organic structure directing agent-free CHA type zeolite membrane and membrane fabricated thereby

The present invention relates to a method of preparing a perm-selective porous membrane and a method of separating gases using the prepared porous membrane. According to the present invention, a membrane is synthesized using a hierarchically structured alumina porous support by a counter diffusion method. During this synthesis, the diffusion rate of metal ions loaded on the porous support is controlled by controlling the pore size of the porous support, and the position at which the membrane is synthesized is controlled by synthesizing the membrane inside the support. This can increase the physical stability of the membrane and make the membrane thicker so as to ensure higher H/COseparation factors.

Growing community of inventors

Seoul, South Korea

Eunhee Jang