Lg Chem, Ltd

Junwon Choi

Ye Hoon Im

Kwangwook Choi

Byoung Hyoun Kim

Su Youn Han

Sanghyeok Im

Tai Min Noh

Yeu Young Youn

Kwangyeon Park

Dae Hun Kim

Kyoungjoo Jin

Seonyoung Jegal

Jaesung Kim

Hyoung Joon Son

Young Myung Gee

Ye Hoon Lim

The present invention provides a solid phase extraction method using a micro device having a dam forming portion including a dam, the solid phase extraction method comprising the steps of: (i) injecting a solvent and a filler into the micro device, moving the solvent to the dam forming portion, the dam allowing the solvent to flow therethrough and preventing the filler from passing therethrough, and adsorbing a material to be separated onto the filler in the dam forming portion; and (ii) extracting, from the filler, the adsorbed material, wherein the micro device is rotated with respect to a central axis during one of steps (i) and (ii), and the rotation of the micro device is performed at an angular velocity defined by equation 1.

Solid phase extraction method using micro device

A fuel cell stack structure in which unit cells are stacked includes first window frames and second window frame. The second window frames each have an area larger than an area of a first window frame and are periodically disposed at a predetermined interval in a direction in which the unit cells are stacked. Heat movement is promoted, a temperature deviation in the fuel cell stack structure is mitigated, and a temperature distribution is uniformized.

Fuel cell stack structure

The present invention relates to a reverse osmosis filter module including an improved feed spacer, and particularly, to a reverse osmosis filter module including an improved feed spacer which has an asymmetric diameter in an intersection in which a first set of filaments and a second set of filaments intersect, thereby reducing differential pressure by increasing a cross-sectional area of a flow path, and mitigating concentration polarization by developing a swirl flow.

Reverse osmosis filter module

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Daejeon, South Korea

Junwon Choi