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首页> 外文期刊>Environmental Science & Technology >Reactivation of a commercial diesel oxidation catalyst by acid washing
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Reactivation of a commercial diesel oxidation catalyst by acid washing

机译：通过酸洗使商业柴油氧化催化剂再活化

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The catalytic activity of samples taken from an oxidation catalyst mounted on diesel-driven automobiles and aged under road conditions was recovered to a significant extent by washing with a dilute solution of citric acid. The characterization of samples arising from a fresh, a vehicle-aged, and a regenerated catalyst was carried out by scanning electron microscopy (SEM-EDS), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Relatively high levels of S and P, in the form of aluminum sulfate and phosphate, respectively, together with contaminant Si were detected in the used catalyst. Washing of the vehicle-aged catalytic oxidation converter revealed high efficiency in the extraction of the main contaminants detected (S and P) by this nondestructive methodology. The results of the experiments reported here should encourage the development of a technology based on this reactivation procedure for the rejuvenation of the catalytic device mounted on diesel exhaust pipes.
机译：通过用柠檬酸稀溶液洗涤，从安装在柴油驱动的汽车上的氧化催化剂中取出并在道路条件下老化的样品的催化活性得到了很大程度的恢复。通过扫描电子显微镜（SEM-EDS），X射线衍射（XRD）和X射线光电子能谱（XPS）对来自新鲜的，老化的和再生的催化剂的样品进行表征。在使用过的催化剂中检测到较高含量的S和P（分别为硫酸铝和磷酸盐）以及杂质Si。车辆老化的催化氧化转化器的清洗显示出通过这种非破坏性方法在提取检测到的主要污染物（S和P）方面具有很高的效率。此处报告的实验结果应鼓励基于此重新激活程序的技术的发展，以使安装在柴油机排气管上的催化装置恢复活力。

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