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Adsorptive denitrogenation and desulfurization of diesel fractions by mesoporous SBA15-supported nickel(II) phosphide synthesized through a novel approach of urea matrix combustion / Syed A. Shahriar in Industrial & engineering chemistry research, Vol. 51 N° 44 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14503-14510 Titre : Adsorptive denitrogenation and desulfurization of diesel fractions by mesoporous SBA15-supported nickel(II) phosphide synthesized through a novel approach of urea matrix combustion Type de document : texte imprimé Auteurs : Syed A. Shahriar, Auteur ; Hongfei Lin, Auteur ; Ying Zheng, Auteur Année de publication : 2013 Article en page(s) : pp. 14503-14510 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Combustion  Desulfurization Résumé : Stringent environmental regulations on the sulfur content in transportation fuels have made ultradeep desulfurization of diesel an important research topic. One of the approaches to promote the effectiveness of the conventional hydrodesulfurization (HDS) process is to remove the organic nitrogen-containing compounds from the feed before HDS. Adsorptive removal of nitrogen compounds at room temperature and pressure without the presence of hydrogen was studied using a high-capacity adsorbent, Ni2P/SBA15, which was prepared by the urea matrix combustion (UMxC) method. A metal loading of 7 wt % Ni was observed to be optimum among the loadings tested. The nitrogen adsorption capacity reached 9.1 mg/ g of adsorbent, which is higher than the capacities of most of the reported adsorbents. Ni2P/SBA15 was characterized by Brunauer―Emmett―Teller analysis, X-ray diffraction, Fourier transform IR spectroscopy, and transmission electron microscopy (TEM). The mesoporous nature of the adsorbent was confirmed by nitrogen adsorption/desorption analysis as well as TEM analysis. Uniform dispersion of Ni2P was observed in TEM images. Solvent-washing regeneration was studied, and four adsorption-and-regeneration cycles were carried out. Approximately 95% of the adsorptive capacity of the sorbent was recovered after four cycles. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620364 [article] Adsorptive denitrogenation and desulfurization of diesel fractions by mesoporous SBA15-supported nickel(II) phosphide synthesized through a novel approach of urea matrix combustion [texte imprimé] / Syed A. Shahriar, Auteur ; Hongfei Lin, Auteur ; Ying Zheng, Auteur . - 2013 . - pp. 14503-14510. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 44 (Novembre 2012) . - pp. 14503-14510 Mots-clés : Combustion  Desulfurization Résumé : Stringent environmental regulations on the sulfur content in transportation fuels have made ultradeep desulfurization of diesel an important research topic. One of the approaches to promote the effectiveness of the conventional hydrodesulfurization (HDS) process is to remove the organic nitrogen-containing compounds from the feed before HDS. Adsorptive removal of nitrogen compounds at room temperature and pressure without the presence of hydrogen was studied using a high-capacity adsorbent, Ni2P/SBA15, which was prepared by the urea matrix combustion (UMxC) method. A metal loading of 7 wt % Ni was observed to be optimum among the loadings tested. The nitrogen adsorption capacity reached 9.1 mg/ g of adsorbent, which is higher than the capacities of most of the reported adsorbents. Ni2P/SBA15 was characterized by Brunauer―Emmett―Teller analysis, X-ray diffraction, Fourier transform IR spectroscopy, and transmission electron microscopy (TEM). The mesoporous nature of the adsorbent was confirmed by nitrogen adsorption/desorption analysis as well as TEM analysis. Uniform dispersion of Ni2P was observed in TEM images. Solvent-washing regeneration was studied, and four adsorption-and-regeneration cycles were carried out. Approximately 95% of the adsorptive capacity of the sorbent was recovered after four cycles. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620364

Development and performance of CaO/La2O3 sorbents during calcium looping cycles for CO2 capture / Cong Luo in Industrial & engineering chemistry research, Vol. 49 N° 22 (Novembre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11778–11784 Titre : Development and performance of CaO/La2O3 sorbents during calcium looping cycles for CO2 capture Type de document : texte imprimé Auteurs : Cong Luo, Auteur ; Ying Zheng, Auteur ; Ning Ding, Auteur Année de publication : 2011 Article en page(s) : pp. 11778–11784 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Sorbents Résumé : The calcium looping cycles method has been identified as an attractive method for CO2 capture during coal combustion and gasification processes. However, it is well-known that the capture capacity of CaO undergoes a rapid decrease after mutiple cycles. In order to improve the stability of CO2 capture capacity in CaO, this paper focuses on the development and performance of the synthetic CaO/La2O3 sorbents for calcium looping cycles.The sorbents were synthesized by three different methods: dry physical mixing, wet chemistry, and sol−gel combustion synthesis (SGCS). Their multicyclic CO2 capture capacity and the effect of the additive La2O3 were investigated in a fixed bed reactor system. The results indicate that the additive of La2O3 plays a positive role in the carbonation/calcination reactions, and the SGCS-made synthetic sorbent is composed of ultrafine well-dispersed hollow structured particles which are beneficial to the gas-phase diffusion on the surface area and can prevent small CaO particles from agglomeration effectively. As a result, the novel synthetic sorbent with the molar ratio of Ca to La of 10:1 made by the SGCS method provides the best performance of a carbonation conversion of 72% under mild calcination conditions and a carbonation conversion of 36% under severe calcination conditions (high temperature and high CO2 concentration) after 20 cycles. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1012745 [article] Development and performance of CaO/La2O3 sorbents during calcium looping cycles for CO2 capture [texte imprimé] / Cong Luo, Auteur ; Ying Zheng, Auteur ; Ning Ding, Auteur . - 2011 . - pp. 11778–11784. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 22 (Novembre 2010) . - pp. 11778–11784 Mots-clés : Sorbents Résumé : The calcium looping cycles method has been identified as an attractive method for CO2 capture during coal combustion and gasification processes. However, it is well-known that the capture capacity of CaO undergoes a rapid decrease after mutiple cycles. In order to improve the stability of CO2 capture capacity in CaO, this paper focuses on the development and performance of the synthetic CaO/La2O3 sorbents for calcium looping cycles.The sorbents were synthesized by three different methods: dry physical mixing, wet chemistry, and sol−gel combustion synthesis (SGCS). Their multicyclic CO2 capture capacity and the effect of the additive La2O3 were investigated in a fixed bed reactor system. The results indicate that the additive of La2O3 plays a positive role in the carbonation/calcination reactions, and the SGCS-made synthetic sorbent is composed of ultrafine well-dispersed hollow structured particles which are beneficial to the gas-phase diffusion on the surface area and can prevent small CaO particles from agglomeration effectively. As a result, the novel synthetic sorbent with the molar ratio of Ca to La of 10:1 made by the SGCS method provides the best performance of a carbonation conversion of 72% under mild calcination conditions and a carbonation conversion of 36% under severe calcination conditions (high temperature and high CO2 concentration) after 20 cycles. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1012745