In Situ Synthesis of Cu-SAPO-34/Cordierite for the Catalytic Removal of NOx From Diesel Vehicles by C3H8
In Situ Synthesis of Cu-SAPO-34/Cordierite for the Catalytic Removal of NOx From Diesel Vehicles by C3H8
复制标题
原位合成 Cu-SAPO-34/堇青石 C3H8 催化脱除柴油车 NOx
DOI：
10.1016/s1872-2067(10)60205-7
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发表时间：
2011-04-01
影响因子：
16.5
通讯作者：
Bao Weiren
中科院分区：
文献类型：
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作者：
Liu Zhiqiang;Tang Lei;Bao Weiren
采用原位水热合成法制备了Cu-SAPO-34/堇青石催化剂。采用X射线衍射仪、扫描电镜、物理吸附-脱附仪对Cu-SAPO-34/堇青石样品的形貌和结构进行了表征。采用固定床反应器对模拟柴油车尾气中NOx的脱除进行了研究。研究了C3 H8、O-2浓度和水蒸气对催化剂活性的影响。结果表明，原位合成法制备的Cu-SAPO-34涂层牢固致密，一次合成后负载量可达20%以上。Cu-SAPO-34/堇青石催化剂的比表面积比堇青石催化剂的大幅度增加。采用原位合成法制备的活性Cu组分可显著提高C3 H8选择性催化还原NOx的活性。在500 - 650 ℃之间，Cu-SAPO-34/堇青石催化剂上的NOx还原大于60%。在原料气中加入10%的水蒸气后，NOx转化率降低，但水蒸气引起的失活不是永久性的。
A Cu-SAPO-34/cordierite catalyst was prepared by in situ hydrothermal synthesis. The morphology and structure of the Cu-SAPO-34/cordierite samples were characterized by X-ray diffraction, scanning electron microscopy, and physical adsorption-desorption analyzer. The removal of NOx from simulated diesel vehicle exhaust gas was carried out using a fixed-bed reactor. The effects of C3H8, O-2 concentrations, and water vapor on the activity of the catalyst were studied. The results indicate that the Cu-SAPO-34 coatings obtained by the in situ synthesis are firm and compact, and the loading amount is found to be more than 20% after one synthesis operation. The surface areas of the Cu-SAPO-34/cordierite catalysts increase greatly compared with that of cordierite. The active Cu component prepared through in situ synthesis can significantly improve the activity of selective catalytic reduction of NOx by C3H8. NOx reduction over the Cu-SAPO-34/cordierite catalyst is more than 60% between 500 and 650 degrees C. The NOx conversion decreases after the addition of 10% water vapor to the feed gas but the deactivation caused by water vapor is not permanent.