【摘 要】
：
Cu-SAPO-34/cordierite catalysts were prepared via one-step hydrothermal synthesis procedure and their performances to remove NOx from the diesel vehicle exhaust were evaluated.Its morphology, structur
【出 处】
：
2012 Postdoctoral Symposium of China on Materials Science &
论文部分内容阅读
Cu-SAPO-34/cordierite catalysts were prepared via one-step hydrothermal synthesis procedure and their performances to remove NOx from the diesel vehicle exhaust were evaluated.Its morphology, structure, Cu element content and valence state were characterized by SEM, XRD, ICP and XPS, respectively.The experimental results show the active component Cu in the catalysts via in situ synthesis could significantly improve the SCR activities of NOx and the optimal Cu content is at the range 0.30-0.40 wt%.The conversion rate of NOx to N2 by NH3 over Cu-SAPO-34/cordierite could almost be up to 100% and more than 60% in the temperature range of 300-670 ℃ and 300-620 ℃ corresponding to space velocity of 12 000 h-1 and 36 000 h-1, respectively.Almost no N2O can be detected by GC during the evaluation process.The catalysts also show a good hydrothermal and chemical stability in the atmosphere with H2O.
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