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Effect of calcination temperature on catalytic hydrolysis of COS over CoNiAl catalysts derived from hydrotalcite precursor / Honghong Yi in Industrial & engineering chemistry research, Vol. 50 N° 23 (Décembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 23 (Décembre 2011) . - pp. 13273-13279 Titre : Effect of calcination temperature on catalytic hydrolysis of COS over CoNiAl catalysts derived from hydrotalcite precursor Type de document : texte imprimé Auteurs : Honghong Yi, Auteur ; Hongyan Wang, Auteur ; Xiaolong Tang, Auteur Année de publication : 2012 Article en page(s) : pp. 13273-13279 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Precursor  Catalyst  Hydrolysis  Catalytic  reaction  Calcining Résumé : A series of CoNiAl composite oxide catalysts were prepared by calcining the CoNiAl hydrotalcite-like precursor at various temperatures and used in the catalytic hydrolysis of carbonyl sulfide (COS). The raw CoNiAl precursor and calcined products were characterized by various technologies. The catalyst calcined at 350 °C showed excellent activity and stability for COS hydrolysis at 50 °C and GHSV of 2000 h―1 with temperature of water saturator of 25 °C. The CoNiAl precursor was decomposed at 350 °C to form NiO accompanying spinel phase and hydroxyl groups (OH―), which were active sites of the hydrolysis of COS. With lower calcination temperature, the precursor is incompletely decomposed to form mixed oxides, thereby decreasing the catalyst activity. Increasing the calcination temperature above 350 °C led to severe sintering of NiO and other active components, causing decrease in the number of active sites. The deactivation of catalysts was also investigated. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25267483 [article] Effect of calcination temperature on catalytic hydrolysis of COS over CoNiAl catalysts derived from hydrotalcite precursor [texte imprimé] / Honghong Yi, Auteur ; Hongyan Wang, Auteur ; Xiaolong Tang, Auteur . - 2012 . - pp. 13273-13279. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 23 (Décembre 2011) . - pp. 13273-13279 Mots-clés : Precursor  Catalyst  Hydrolysis  Catalytic  reaction  Calcining Résumé : A series of CoNiAl composite oxide catalysts were prepared by calcining the CoNiAl hydrotalcite-like precursor at various temperatures and used in the catalytic hydrolysis of carbonyl sulfide (COS). The raw CoNiAl precursor and calcined products were characterized by various technologies. The catalyst calcined at 350 °C showed excellent activity and stability for COS hydrolysis at 50 °C and GHSV of 2000 h―1 with temperature of water saturator of 25 °C. The CoNiAl precursor was decomposed at 350 °C to form NiO accompanying spinel phase and hydroxyl groups (OH―), which were active sites of the hydrolysis of COS. With lower calcination temperature, the precursor is incompletely decomposed to form mixed oxides, thereby decreasing the catalyst activity. Increasing the calcination temperature above 350 °C led to severe sintering of NiO and other active components, causing decrease in the number of active sites. The deactivation of catalysts was also investigated. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25267483

Mechanism of catalytic oxidation of NO over Mn - Co - Ce - Ox catalysts with the aid of nonthermal plasma at low temperature / Kai Li in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11023-11028 Titre : Mechanism of catalytic oxidation of NO over Mn - Co - Ce - Ox catalysts with the aid of nonthermal plasma at low temperature Type de document : texte imprimé Auteurs : Kai Li, Auteur ; Xiaolong Tang, Auteur ; Honghong Yi, Auteur Année de publication : 2011 Article en page(s) : pp. 11023-11028 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Low  temperature  Non  thermal  plasma  Catalyst  Oxidation  Catalytic  reaction Résumé : NO catalytic oxidation performances have been investigated on a Mn—Co—Ce—Ox catalyst by using nonthermal plasma (NTP) reactor: the "PRFC" reactor. In the PRFC system, the plasma reactor was followed by the catalyst. The results showed that the NO catalytic oxidation of the Mn―Co―Ce―Ox catalyst was significantly enhanced by the nonthermal plasma in the PRFC system at the temperature range of 50―250°C. The oxidation capability of the catalyst was improved with the increase of the input energy density in the PRFC system. It was also found that the activity was suppressed when SO2 was present in the reaction mixture, whereas the catalytic oxidation ability was obviously enhanced under the NTP-assist, because NTP system is conducive to synchronous SO2 removal. The antipoisoning performance and NO catalytic oxidation capacity of this mechanism are superior to those of others reported in the literature. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573298 [article] Mechanism of catalytic oxidation of NO over Mn - Co - Ce - Ox catalysts with the aid of nonthermal plasma at low temperature [texte imprimé] / Kai Li, Auteur ; Xiaolong Tang, Auteur ; Honghong Yi, Auteur . - 2011 . - pp. 11023-11028. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 11023-11028 Mots-clés : Low  temperature  Non  thermal  plasma  Catalyst  Oxidation  Catalytic  reaction Résumé : NO catalytic oxidation performances have been investigated on a Mn—Co—Ce—Ox catalyst by using nonthermal plasma (NTP) reactor: the "PRFC" reactor. In the PRFC system, the plasma reactor was followed by the catalyst. The results showed that the NO catalytic oxidation of the Mn―Co―Ce―Ox catalyst was significantly enhanced by the nonthermal plasma in the PRFC system at the temperature range of 50―250°C. The oxidation capability of the catalyst was improved with the increase of the input energy density in the PRFC system. It was also found that the activity was suppressed when SO2 was present in the reaction mixture, whereas the catalytic oxidation ability was obviously enhanced under the NTP-assist, because NTP system is conducive to synchronous SO2 removal. The antipoisoning performance and NO catalytic oxidation capacity of this mechanism are superior to those of others reported in the literature. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573298

Phosphine adsorption removal from yellow phosphorus tail gas over CuO - ZnO - La2O3/activated carbon / Honghong Yi in Industrial & engineering chemistry research, Vol. 50 N° 7 (Avril 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3960-3965 Titre : Phosphine adsorption removal from yellow phosphorus tail gas over CuO - ZnO - La2O3/activated carbon Type de document : texte imprimé Auteurs : Honghong Yi, Auteur ; Qiongfen Yu, Auteur ; Xiaolong Tang, Auteur Année de publication : 2011 Article en page(s) : pp. 3960-3965 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Activated  carbon  Adsorption Résumé : CuO―ZnO―La2O3/activated carbon (AC) adsorbent was used for phosphine (PH3) adsorption removal. The effects of O2 content, PH3 concentration, and adsorption temperature on the PH3 adsorption were investigated. The adsorbents were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry/thermogravimetric (DSC/ TGA), and X-ray photoelectron spectroscopy (XPS). The results show that PH3 adsorption capacity is enhanced significantly by increasing oxygen content or adsorption temperature. Two bands that appear at 1161.1 and 1008.5 cm―1 in the FTIR spectrum of the exhausted adsorbent are ascribed to H3PO4. An exothermic peak in the DSC curve of exhausted adsorbent is ascribed to desorption of H3PO4 and condensation reactions of H3PO4 adsorbed species. It is observed that both P4O10 (65.09%) and H3PO4 (34.91%) exist over the exhausted adsorbent. The CuO―ZnO―La2O3/AC adsorbs PH3 and PH3 adsorbed is oxidized to form H3PO4 and P4O10. It naturally follows that the CuO―ZnO―La2O3/AC will be a potential adsorbent for PH3 removal from yellow phosphorus tail gas. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24027642 [article] Phosphine adsorption removal from yellow phosphorus tail gas over CuO - ZnO - La2O3/activated carbon [texte imprimé] / Honghong Yi, Auteur ; Qiongfen Yu, Auteur ; Xiaolong Tang, Auteur . - 2011 . - pp. 3960-3965. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 7 (Avril 2011) . - pp. 3960-3965 Mots-clés : Activated  carbon  Adsorption Résumé : CuO―ZnO―La2O3/activated carbon (AC) adsorbent was used for phosphine (PH3) adsorption removal. The effects of O2 content, PH3 concentration, and adsorption temperature on the PH3 adsorption were investigated. The adsorbents were characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry/thermogravimetric (DSC/ TGA), and X-ray photoelectron spectroscopy (XPS). The results show that PH3 adsorption capacity is enhanced significantly by increasing oxygen content or adsorption temperature. Two bands that appear at 1161.1 and 1008.5 cm―1 in the FTIR spectrum of the exhausted adsorbent are ascribed to H3PO4. An exothermic peak in the DSC curve of exhausted adsorbent is ascribed to desorption of H3PO4 and condensation reactions of H3PO4 adsorbed species. It is observed that both P4O10 (65.09%) and H3PO4 (34.91%) exist over the exhausted adsorbent. The CuO―ZnO―La2O3/AC adsorbs PH3 and PH3 adsorbed is oxidized to form H3PO4 and P4O10. It naturally follows that the CuO―ZnO―La2O3/AC will be a potential adsorbent for PH3 removal from yellow phosphorus tail gas. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24027642