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第 6 期                        庞子涛,等: FeCoY 催化剂的催化还原脱硫脱硝性能                                ·1117·


            竞争吸附,抑制了金属硫化物的产生,或者产生的                             脱硝过程仅遵循 COS 中间产物机理,1% O 2 对催化
            金属硫化物重新被氧化为金属氧化物                  [19-20] ,不能发     剂同时脱硫脱硝均有毒害作用,其中氧气对 SO 2 的
            生反应(8),不能产生高活性的 COS,导致后续反                          毒害作用可逆,而对 NO 的毒害作用不可逆。
            应无法发生。而 SO 2 除了遵循 COS 反应机理外,可
                                                               参考文献:
            能还遵循 Redox 反应机理,氧气的加入,不会影响
                                                               [1]   China Environmental Protection Industry Association Desulphurization
            金属氧化物与 CO 的反应,或者在该温度下影响较                               and Denitrification Committee (中国环境保护产业协会脱硫脱硝委
            小,反应(3)可以发生,所以 SO 2 在 O 2 加入一定                         员会).  Development  report  on  desulfurization  and  denitrification
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            时间后还有部分活性。可以初步推断 CO 催化还原                               (7): 10-24.
                                                               [2]   Li Hongqi (李鸿琦), Zhang Xiaolin (章小林), Li Xiaoding (李小定).
            NO 只遵循 COS 反应机理,而 SO 2 遵循 Redox 和 COS                  Research development of flue gas desulfuration and denitrifictation
            反应机理,这也就解释了 O 2 加入后 NO 的转化率最                           integration  technology[J].  Power  Technology  and  Environmental
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            NO 的转化率甚至出现了负值,O 2 毒化了 NO 的活                           from flue gas using a CuO/Al 2O 3, catalyst sorbent : I. Deactivation of
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            恢复的毒害,失去了脱硝活性,而对 SO 2 的毒害作                         [6]   Hao R,  Zhao Y, Yuan B, et al. Establishment of a novel advanced
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            能发挥良好的催化性能。但是在实际烟气中,存在                                 305-310.
            体积分数 3%~5%的 O 2 。要解决氧气对催化剂的影                       [8]   Shi Fenghua (史风华). Study on desulfurization and denitration with
                                                                   CO  over  rare  earth  oxide  loaded  on  active  carbon[D].  Beijing:
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            进,史风华 针对 CO 催化还原脱硫脱氮反应设计                               containing mesoporous silica[J].Applied Catalysis B: Environmental,
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            了脱硫脱硝除尘一体化工艺,在反应器进口设置耗                             [10]  PengYaguang (彭亚光). Preparation of Ce xTi (1x)O 2 composite oxides
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            工艺角度出发在催化剂反应器前端消除氧气,以达                             [13]  Huang Wei (黄伟), Sun Shengkai (孙盛凯), Li Yujie (李玉杰), et al.
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            脱硝转化率均能达到 100%,T 90% 约为 218 ℃,其中,                  [19]  Song  Yongji  (宋永吉),  Wang  Ting  (王婷),  Zhao  Yu  (赵玉),  et al.
                                                                   Desulfurization and denitrification performance of M-Y/AC catalysts
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            测到了明显的 CoFe 2 O 4 尖晶石结构的特征衍射峰。                         2016, 44(9): 1112-1118.
                                                               [20]  Wang Xuehai (王学海), Fang Xiangchen (方向晨), Liu Zhongsheng
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            初步得出脱硫过程为 Redox-COS 协同作用机理,而                           20(10): 63-67.
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