분무공정을 이용한 다공성 니켈 분말 및 니켈 기반 촉매 구조체 제조에 관한 연구

Abstract

Porous chemical catalyst powder is produced through a mechanical alloying process and aluminum selectively leached by NaOH leaching method to produce a porous catalyst powder. However, incomplete leaching can produce a low-purity porous catalyst powder. Therefore, research has been conducted on the possibility of producing high purity catalyst powder by minimizing impurities remaining in the preparation of catalyst powder using a pore-forming agent. In this study, we have studied the preparation of catalyst structure based on Ni foam through the preparation of porous nickel catalyst powder using nickel powder. Porous nickel oxide powders were prepared by the spray pyrolysis process using pore–former agent and nickel salt, followed by reduction heat treatment to prepare porous nickel powder. In order to prepare the catalyst structure, porous nickel powder was coated on the surface of Ni foams by electrostatic spraying process, followed by a reduction heat treatment to synthesize porous nickel oxide powder coated catalyst structure. In order to observe the characteristics of the structure, the porous catalyst powder and the catalyst structure were heat treated at 400°C, 600°C and 800°C. and were confirmed to be used with excellent catalytic efficiency through gas chromatography. The degree of adhesion of the catalyst powder on each heat treated Ni foam was verified by the adhesion on test. The XRD analysis was used to confirm the nickel phase, and the microstructure of the porous catalyst powder was analyzed by the FE-SEM.