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مجله مهندسی شیمی
جزئیات رویداد
همایش ، رویداد ، ژورنال
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  • pd/al bimetallic nanoparticles for complete hydrodechlorination of 3-chlorophenol in aqueous solution

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    • تاریخ ارائه: 1392/01/01
    • تاریخ انتشار در تی پی بین: 1392/01/01
    • تعداد بازدید: 615
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     nanoscale al particles with average diameter of about 100 nm were employed to prepare pd/al nanoparticles (nps) by chemical displacement deposition. it was proved that pd2+acidic deposition solution was superior to its alkaline deposition solution in terms of pd loading rate on al nps. the pd/al nps were characterized by icp–oes, sem, tem, xrd, bet and then used to explore hydrodechlorination (hdc) performance of 3-chlorophenol (3-cp) in aqueous solution. major factors affecting hdc efficiency were investigated including al substrate sizes, ph, pd loadings in pd/al nps, dosage of pd/al nps, and temperature. the optimal results indicated that nanoscale pd/al bimetallic particles were highly effective for 3-cp hdc. hdc efficiency was only about 30% in 50 min reaction with micron sizes of pd/al particles (100–400 mesh), whereas it increased to 99.7% within 30 min using pd/al nps at 25 °c. aqueous ph presented remarkable effect on hdc and ph 3–4 was the optimum range for hdc as ph varied from 2 to 11. pd loadings and pd/al dosages were optimized for highly effective hdc as 1.16 wt.% and 2 g/l, respectively. in addition, higher hdc performance was obtained while reaction temperature arrived at 45 °c and 0.389 mm of 3-cp could be completely dechlorinated into phenol only within 10 min reaction.

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