主催: 日本エネルギー学会, 石炭科学部会, コークス工学研究部会, 重質油部会
共催: 石炭・炭素資源有効利用研究会
会議名: 第58回石炭科学会議
開催地: オンライン開催
開催日: 2021/10/26 - 2021/10/27
p. 8-9
Since a large amount of NOx, that is one of air pollutants, arises from coal combustion process, the SCR method is generally applied for coal-fired power stations to reduce NOx emissions. In the SCR method, NH3 is introduced into the flue gas at De-NOx catalyst, and NOx is reduced to N2 by catalytic reaction. This De-NOx catalyst is located upstream of the exhaust gas treatment process, and exposed to a lot of soot and dust particles in the flue gas. Previous studies have revealed that the deterioration of De-NOx catalyst is caused by the deposition of the silica compounds on its surface. Then, the adhesion conditions of these silica compounds were experimentally clarified in this study. De-NOx catalyst samples were exposed to siloxane vapor in simulated flue gas. The formation of silica layer on the surface of De-NOx catalyst was observed by SEM/EDX. The experimental results suggested that silica layer became more explicit in gas including impurities, such as SO2, NH3, and NO.