| 초록 |
In 2016, the US-EPA (United States-Environmetal Protection Agency) provided certification guidance of 'Certification of Diesel Engines Equipped with Vanadium-based SCR Catalyst'. For this certification, a system for the vanadium sublimation test was installed and studied at KTL(Korea Testing Laboratory). In this study, vanadium sublimation were investigated with commercial vanadium-based SCR. The vanadium sublimation was perfomed at laboratory scale using a monolith SCR catalyst. Vanadia vapors were adsorbed onto a high surface area alumina capture bed located downstream of the catalyst in the hot zone of the furnace. The effects of temperature(500 ~ 700℃), H2O concentration (0, 5, 10 vol%), space velocity (10,000 ~ 50,000hr-1), vanadium contents and NH3/NO mole ratio on vanadium sublimation were investigated. After each test, alumina and quartz wool samples were mineralized from HNO3, HF and HCl mixture. The digests were then diluted with high purity water prior to ICP-MS analysis. |
