CAJ | 학술논문

为了高效经济地控制燃煤电站汞的排放，探索新型SCR催化剂上汞的催化氧化具有重要的学术价值和广阔的应用前景。Hg0在 MnOx-CeO2/γ-Al2O3（MnCe15）催化剂上被氧化后会以多种形态存在于催化剂表面，为确定MnCe15催化剂上汞的化合物的赋存形态，使用程序升温热分解方法研究了纯汞化合物的分解曲线，并与在不同烟气条件下处理过的MnCe15催化剂的分解脱附曲线进行了对比。研究确认了反应中HgO、HgCl2、Hg(NO3)2和HgSO4的生成，并根据实验结果分析了相应的汞化合物生成的反应路径。结果表明，在模拟烟气条件下HgCl2是主要的异相催化反应产物，同时可以在催化剂表面检测到少量HgO和HgSO4的生成。这一结论可为研究SCR催化剂上Hg0的催化氧化机理提供基础。
위료고효경제지공제연매전참홍적배방，탐색신형SCR최화제상홍적최화양화구유중요적학술개치화엄활적응용전경。Hg0재 MnOx-CeO2/γ-Al2O3（MnCe15）최화제상피양화후회이다충형태존재우최화제표면，위학정MnCe15최화제상홍적화합물적부존형태，사용정서승온열분해방법연구료순홍화합물적분해곡선，병여재불동연기조건하처리과적MnCe15최화제적분해탈부곡선진행료대비。연구학인료반응중HgO、HgCl2、Hg(NO3)2화HgSO4적생성，병근거실험결과분석료상응적홍화합물생성적반응로경。결과표명，재모의연기조건하HgCl2시주요적이상최화반응산물，동시가이재최화제표면검측도소량HgO화HgSO4적생성。저일결론가위연구SCR최화제상Hg0적최화양화궤리제공기출。
Hg0 oxidation over selective catalytic reduction (SCR) catalysts would be of great scientific and practical value to control mercury emission in coal-fired power stations. To elucidate the mercury species existing on the MnOx-CeO2/γ-Al2O3(MnCe15) catalyst surface, a temperature programmed thermal decomposition (TPTD) method was used in this study to analyze the characteristics of the mercury species formed on the MnCe15 catalysts. A series of pure mercury compounds mixed with fresh MnCe15 were first studied for qualitative calibration. Then, the TPTD method was used to identify the Hg species on used MnCe15 catalysts pretreated under different operation conditions. The formation of HgO, HgCl2, Hg(NO3)2 and HgSO4 during the oxidation process was confirmed and the reaction pathways were proposed. The mercury species present were mainly HgCl2 after MnCe15 catalysts were used to oxidize Hg0 under simulated flue gas conditions. HgO and HgSO4 were found to exist in very low concentrations. This study provided the basis for the study on catalytic oxidation mechanism of Hg0 on SCR catalyst.