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      2. 鈣鈦礦催化劑用于氨選擇性還原氮氧化物的研究進展
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        中國科學院地球環境研究所

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        鐵酸鹽系納米異/同質結構筑及多電子活化-可見光降解NOx機理,國家自然科學基金項目(面上項目,重點項目,重大項目)


        Research progress of perovskite catalysts for selective catalytic reduction of NOx with NH3
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        Institute of Earth Environment, Chinese Academy of Sciences

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          摘要:

          氨選擇性催化還原氮氧化物(NOx)技術是目前應用較為廣泛的催化脫硝技術,以V2O5-WO3(MoO3)/TiO2為核心催化劑,但其存在溫度窗口較窄且偏高、堿金屬中毒易失活、釩具有生物毒性對環境造成二次污染等諸多問題,亟需研究者開發新型高效且環境友好的催化劑體系。鈣鈦礦材料因其獨特的結構,具有良好的中高溫活性,優異的耐高溫、抗燒結且環保無害的特點成為選擇性催化還原NOx領域的研究熱點。本文綜述了近年來國內外關于鈣鈦礦NH3-SCR催化劑的研究進展,較為全面地對鈣鈦礦催化劑的主要類型、脫硝活性、構效關系及反應機理進行了論述,并對該領域未來可能的發展方向和研究目標進行了展望。

          Abstract:

          Ammonia selective catalytic reduction of nitrogen oxides (NOx) technology with V2O5-WO3 (MoO3) / TiO2 as the core catalyst is currently widely used. But it has many problems such as narrow and high temperature window, easy to poison by alkali inactivation, vanadium"s biological toxicity and secondary pollution to the environment, which require researchers to develop new efficient and environmentally friendly catalyst systems. Due to its unique structure, perovskite materials have good mid-high temperature activity, excellent high temperature resistance, sintering resistance and environmental protection and harmless characteristics, which has attracted more and more concerns in the field of selective catalytic reduction of NOx. This paper summarized the research progress of perovskite NH3-SCR catalysts in recent years. The main types of perovskite catalysts, denitration activity, structure-activity relationship and reaction mechanism were comprehensively discussed. The future possible development direction of perovskite NH3-SCR catalysts are prospected.

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        • 收稿日期:2020-05-06
        • 最后修改日期:2020-06-09
        • 錄用日期:2020-06-12
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