CAJ | 학술논문

燃煤电厂汞排放控制是当前的研究热点，实现燃煤烟气中汞的脱除涉及两个非常重要的过程：吸附与氧化。本文概述了汞在吸附剂表面吸附的相关理论和单质汞的催化氧化机理，结合碳基和非碳基吸附剂相关吸附特性的研究现状，对汞的吸附机理进行了讨论，回顾了 SCR、碳基、以及金属和金属氧化物三种常见催化剂对单质汞的催化氧化性能并总结了其可能存在的机理。指出吸附剂表面活性位是决定其对汞吸附效果的关键因素，异相反应是单质汞氧化的重要途径，吸附和氧化是相辅相成的，不同催化剂不同气氛下氧化机理不同。并提出通过氯化物等物质改性能够提高吸附剂的吸附效果，深入研究汞的异相反应机理并开发经济有效的汞脱除方法是今后的研究方向。
연매전엄홍배방공제시당전적연구열점，실현연매연기중홍적탈제섭급량개비상중요적과정：흡부여양화。본문개술료홍재흡부제표면흡부적상관이론화단질홍적최화양화궤리，결합탄기화비탄기흡부제상관흡부특성적연구현상，대홍적흡부궤리진행료토론，회고료 SCR、탄기、이급금속화금속양화물삼충상견최화제대단질홍적최화양화성능병총결료기가능존재적궤리。지출흡부제표면활성위시결정기대홍흡부효과적관건인소，이상반응시단질홍양화적중요도경，흡부화양화시상보상성적，불동최화제불동기분하양화궤리불동。병제출통과록화물등물질개성능구제고흡부제적흡부효과，심입연구홍적이상반응궤리병개발경제유효적홍탈제방법시금후적연구방향。
Developing technologies for mercury control is becoming one of the most important environmental protection issues. Removing mercury from flue gas involves two very important processes:adsorption and oxidation. In this work,the relevant theory of mercury adsorption on adsorbent surface and catalytic oxidation mechanisms of Hg0 were summarized. The adsorption mechanism of mercury was discussed according to the current state of adsorption characteristics of carbon-based and other sorbents. The catalytic oxidation performance of selective catalytic reduction catalysts,carbon-based materials,and metals and metal oxides was reviewed,and the possible reaction mechanisms of each kind of catalyst were discussed. The active sites on adsorbent surface were the key factor in determining absorption efficiency of adsorbents. Heterogeneous reaction was an important way of promoting the oxidation of elemental mercury. There was a close relationship between absorption and oxidation. The oxidation mechanisms varied with catalysts or atmosphere. Finally, future research directions were proposed,involving enhancing the adsorption efficiency of adsorbents by chloride modification,and developing economic and efficient methods of mercury removal with further research on heterogeneous mechanism of mercury.