Synthesis of CeOx/ ?-Al2O3 catalyst for the NH3-SCR of Nox

Synthesis of CeOx/ ?-Al2O3 catalyst for the NH3-SCR of Nox

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فایل ورد Synthesis of CeOx/ ?-Al2O3 catalyst for the NH3-SCR of Nox کاملا فرمت بندی و تنظیم شده در استاندارد دانشگاه و مراکز دولتی می باشد.

توجه : در صورت  مشاهده  بهم ريختگي احتمالي در متون زير ،دليل ان کپي کردن اين مطالب از داخل فایل ورد مي باشد و در فايل اصلي Synthesis of CeOx/ ?-Al2O3 catalyst for the NH3-SCR of Nox،به هيچ وجه بهم ريختگي وجود ندارد


بخشی از متن Synthesis of CeOx/ ?-Al2O3 catalyst for the NH3-SCR of Nox :

سال انتشار : 1395

نام کنفرانس یا همایش : دومين کنفرانس بين المللي يافته هاي نوين پژوهشي در شيمي و مهندسي شيمي

تعداد صفحات : 6

چکیده مقاله:

Cerium oxide catalysts (CeOx) supported on -Al2O3 for high temperature (T=200-400 C) selective catalytic reduction (SCR) of nitrogen oxides (NOx) with NH3 in the presence of excess O2 were prepared by a facile impregnation method. Firstly, the support was prepared by a co-precipitation technique. These catalysts were characterized by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM) and H2-temperature Programmed reduction (H2-TPR) methods. The effects of reaction temperature and CeOx loading were investigated on NOx conversion and selectivity to N2, as a desired product. SEM image of the support showed a spherical and uniform morphology of the alumina with nanometric particles. Under the reaction conditions of 300 C, 1 bar, NO=NH3=900 ppm, O2=5 vol%, GHSV=30,000 h1 and 14 wt% CeOx, NOx conversion and N2 selectivity were 95% and 97%, respectively. XRD pattern and H2-TPR of the best catalyst (14 wt% CeOx) showed the presence of cerium oxide in form of CeO2 as a dominate phase, which is high reactive in NH3-SCR of NOx.

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