Study on Preparation of CeO2-Fe2O3 Ultrafine Powder by Physical Mechanical Method and its Low Temperature SCR Performance AITranslate
Abstract AITranslate
CeO2-Fe2O3ultrafine powder catalyst was prepared by synergy of microwave,ultrasonic and highenergy ball milling.The catalyst was characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR)and denitration activity test.The best experimental conditions were concluded,and NH3-SCR denitration mechanism of the catalyst at low temperature was investigated.The results show that the microwave-ultrasonic synergy is beneficial to the dispersion of CeO2-Fe2O3ultrafine powder,and high-energy ball milling increases the specific surface area of the powder.When Fe/Ce molar ratio is 4∶1,CeO2-Fe2O3ultrafine powder has the best surface properties and catalytic activity.After loaded on activated alumina,the optimum denitration temperature of CeO2-Fe2O3ultrafine powder moves to the low temperature window,and its denitration activity increases by 14.4%.The NH3-SCR reaction process occurring on catalyst surface mainly follows the Eley-Rideal(E-R)mechanism.NH3is the main surface adsorbed species,and NO directly participates in the reaction in gaseous form,to finally generate N2and H2O and achieve the removal of nitrogen oxides.
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DOI：
Chinese Library Classification Number:TQ426.6[化学工程]
Citation Information:
CeO2-Fe2O3ultrafine powder catalyst was prepared by synergy of microwave,ultrasonic and highenergy ball milling.The catalyst was characterized by X-ray diffraction(XRD),scanning electron microscope(SEM),Fourier transform infrared spectroscopy(FTIR)and denitration activity test.The best experimental conditions were concluded,and NH3-SCR denitration mechanism of the catalyst at low temperature was investigated.The results show that the microwave-ultrasonic synergy is beneficial to the dispersion of CeO2-Fe2O3ultrafine powder,and high-energy ball milling increases the specific surface area of the powder.When Fe/Ce molar ratio is 4∶1,CeO2-Fe2O3ultrafine powder has the best surface properties and catalytic activity.After loaded on activated alumina,the optimum denitration temperature of CeO2-Fe2O3ultrafine powder moves to the low temperature window,and its denitration activity increases by 14.4%.The NH3-SCR reaction process occurring on catalyst surface mainly follows the Eley-Rideal(E-R)mechanism.NH3is the main surface adsorbed species,and NO directly participates in the reaction in gaseous form,to finally generate N2and H2O and achieve the removal of nitrogen oxides.
quote
| GB/T 7714-2015 | [1] LI Na, LI Hua, CHEN Ze-dong, et al. Study on Preparation of CeO2-Fe2O3 Ultrafine Powder by Physical Mechanical Method and its Low Temperature SCR Performance[J]. Rare Metals and Cemented Carbides, 2020(6): 64-72. |
| MLA | [1] LI Na, et al., "Study on Preparation of CeO2-Fe2O3 Ultrafine Powder by Physical Mechanical Method and its Low Temperature SCR Performance." Rare Metals and Cemented Carbides, no. 6, 2020, pp. 64-72. |
| APA | [1] LI Na, LI Hua, CHEN Ze-dong, WANG Jing-jing, ZHANG Kai, & WU Wen-fei. (2020). Study on Preparation of CeO2-Fe2O3 Ultrafine Powder by Physical Mechanical Method and its Low Temperature SCR Performance. Rare Metals and Cemented Carbides(6), 64-72. |
| IEEE | [1] LI Na, LI Hua, CHEN Ze-dong, WANG Jing-jing, ZHANG Kai, and WU Wen-fei, "Study on Preparation of CeO2-Fe2O3 Ultrafine Powder by Physical Mechanical Method and its Low Temperature SCR Performance," Rare Metals and Cemented Carbides, no. 6, pp. 64-72, 2020. keywords: {CeO2-Fe2O3ultrafine powder;catalyst;microwave-ultrasonic synergy;high-energy ball milling;NH3-SCR at low temperature;denitration mechanism} |