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microsoft - 环境工程学报
修改稿:201411200 燃煤烟气中多种污染物干法同时脱除研究进展 马丽萍*,王倩倩,唐剑骁,马贵鹏 (昆明理工大学环境科学与工程学院,云南,昆明,650500) 摘要:干法烟气同时脱除技术优于联合脱除技术和湿法烟气脱除技术。本文将国内外现有的干法烟气同时脱除技术按分为三类,即多种污染物吸附脱除技术、催化脱除技术和光催化脱除技术。其中,吸附脱除技术主要吸附剂消耗量大,且吸附剂的再生催化脱除技术主要集中于以CO、NH3、CH4等催化还原同时脱硫脱硝和SCR同时脱硝除汞光催化脱除技术主要TiO2光催化对浓度高的废气处理效率较低,以及光催化剂等使在工业应用受到很大制约。本文最后对干法烟气同时脱除技术进行展望。 关键词:燃煤烟气;干法;同时脱除;催化还原;光催化;脱硫脱硝;除汞; 中图分类号:X51 文献标识码:A Progress in tudy on the dry simultaneous removal method for multi-pollutants from coal-fried fuel gas Ma Liping*; Wang Qianqian; Tang Jianxiao; Ma Guipeng (Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, Yunnan, China) Abstract:dry simultaneous removal technology has many advantages over the combined-removal technology and the wet removal technology. In this paper, we classified the dry simultaneous removal technology for multi-pollutants simultaneous removal as three parts, namely, the adsorbent, the catalyst and the photocatalyst for multi-pollutants removal methods. The adsorbent method which is mainly using carbon material is of good adsorption capacity, but the adsorbent is difficult to regenerate and with large consumption. The catalyst method is mainly using CO, NH3, CH4 etc. as reducing agent to catalyze SO2 and NOX to carry out the simultaneous desulfurization and denitrification, as well as on using the selective reduction catalysis to carry out the simultaneous denitrification and mercury removal. This method is of high efficiency, but the catalyst is deactivated easily with multi-pollutions. The photocatalyst method which is mainly using TiO2 can remove multi-pollutions under lower temperature, but its application was restricted because of its low efficiency under high-concentration fuel gas and low utilization of light source. In last part of the article, we offered an outlook of the dry simultaneous removal technology. Keywords:Coal-fried fuel gas; Dry process; Simultaneous removal technology; Catalytic reduction; hoto
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