...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Fuel >In situ synthesis of CuSAPO-34/cordierite and its selective catalytic reduction of nitrogen oxides in vehicle exhaust: The effect of HF
【24h】

In situ synthesis of CuSAPO-34/cordierite and its selective catalytic reduction of nitrogen oxides in vehicle exhaust: The effect of HF

机译：CuSAPO-34 /堇青石的原位合成及其在汽车尾气中氮氧化物的选择性催化还原：HF的作用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

CuSAPO-34/cordierite catalysts were prepared via in situ hydrothermal synthesis technique with and without HF. The morphology and structure of the synthesized samples were characterized in the present work. The NO_x selective catalytic reduction (SCR) activities of the catalysts were evaluated with a fixed-bed reactor in simulated diesel vehicle exhaust. The results indicate that the addition of HF into the initial gel during the preparation of CuSAPO-34/cordierite can accelerate the crystallization and improve the relative crystallinity of CuSAPO-34, which lead to the compact morphology of the products. Furthermore, the existence of HF can increase the specific pore volume, BET surface area and CuSAPO-34 loading of the catalyst. For the crystallization time of 24 h, the loading amounts of CuSAPO-34 are 20.3 wt% and 13.6 wt% for the samples prepared with and without HF, respectively. The obvious improvement of the catalytic activities for NO_x removal has been obtained over the catalysts prepared with HF. The active temperature window (NO_x conversion rate ＞ 95%) of the samples prepared with HF is wider (340-600 ℃) than the samples prepared without HF (440-540 ℃). The catalysts with HF present great endurance ability for the aging treatment at 650 ℃ with 15 vol.% H_2O. The low temperature activity for NO_x removal of the catalyst prepared with HF is not affected by the aging treatment and the maximum NO_x conversion rate of the aging catalyst at the crystallization time of 12 h is about 96%, but only 80% for the catalyst without HF. The roles of HF and the different performances of the samples prepared with and without HF were discussed with the aid of X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and X-ray photoelectron spectroscopy (XPS) techniques.
机译：通过使用和不使用HF的原位水热合成技术制备CuSAPO-34 /堇青石催化剂。在目前的工作中表征了合成样品的形态和结构。使用固定床反应器在模拟柴油车尾气中评估了催化剂的NO_x选择性催化还原（SCR）活性。结果表明，在制备CuSAPO-34 /堇青石的过程中，在初始凝胶中加入HF可以加速结晶并改善CuSAPO-34的相对结晶度，从而导致产物的形态紧凑。此外，HF的存在可以增加催化剂的比孔体积，BET表面积和CuSAPO-34负载。对于24小时的结晶时间，对于使用和不使用HF制备的样品，CuSAPO-34的负载量分别为20.3重量％和13.6重量％。与用HF制备的催化剂相比，已经获得了用于去除NO_x的催化活性的明显改善。用HF制备的样品的有效温度窗口（NO_x转化率＞ 95％）比不使用HF制备的样品（440-540℃）宽（340-600℃）。含氢氟酸催化剂在650℃，15％（体积）H_2O的条件下具有很好的耐老化性能。 HF制备的催化剂去除NO_x的低温活性不受时效处理的影响，并且在12h的结晶时间时效催化剂的最大NO_x转化率约为96％，而对于不使用HF的催化剂，其仅80％高频借助X射线粉末衍射（XRD），扫描电子显微镜（SEM）和X射线光电子能谱（XPS）技术，讨论了HF的作用以及有无HF制备的样品的不同性能。

著录项

  • 来源
    《Fuel》 |2013年第7期|101-109|共9页
  • 作者

    Jiancheng Wang; Zhiqiang Liu; Gang Feng; Liping Chang; Weiren Bao;

  • 作者单位

    State Key Laboratory of Coal Science and Technology Co-founded by Ministry of Science and Technology and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024, China;

    State Key Laboratory of Coal Science and Technology Co-founded by Ministry of Science and Technology and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024, China;

    Shanghai Research Institute of Petrochemical Technology SINOPEC, Shanghai 201208, China;

    State Key Laboratory of Coal Science and Technology Co-founded by Ministry of Science and Technology and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024, China;

    State Key Laboratory of Coal Science and Technology Co-founded by Ministry of Science and Technology and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    CuSAPO-34/cordierite; NO_x; HF; Diesel vehicle; SCR;

    机译：CuSAPO-34 /堇青石;NO_x;HF;柴油车;可控硅;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号