| 초록 |
The selective synthesis of acetylene directly from methane was studied by employing a metal oxide catalyst with ordered mesoporous alumina (OMA) as a support in a coaxial dielectric barrier discharge plasma reactor. The reaction was carried out using MgO/γ-OMA, MgO/γ-Al2O3 and MgO/α-Al2O3 as catalysts. The specific surface area and the pore size distribution were measured by physisorption method. The crystalline structure and the morphology of the catalysts were investigated by XRD and TEM analyses. The effects of textural property of support, mean size of nanocrystalline MgO, and alumina phase on catalytic performance were investigated especially in terms of unsaturated hydrocarbon formation. Online gas chromatography was conducted to quantitatively analyze the organic gas products. In addition, condensed heavy products, carbon deposition, and precipitates on the dielectric barrier and the metal electrode surface were visually identified. The carbon deposition and the precipitates seemed to deteriorate the performance of production. |
