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13篇 您的检索式:作者名="Michel Lacroix"
    题名 作者 年代 出处 被引量
1硫化态NiW/Al_2O_3催化剂加氢脱硫活性相的研究Ⅰ.XPS和HREM表征显示文摘采用孔饱和共浸法制备了一系列具有相同W含量和不同Ni含量的NiW/Al2 O3 催化剂 ,并对相应的硫化态催化剂进行了XPS和HREM表征 .结果表明 ,引入的助剂Ni优先修饰WS2 晶粒的边角位置 ,形成高活性的NiWS相 .催化剂中助剂Ni在噻吩加氢脱硫反应中的显著促进效应 (活性提高了约 30倍 )与形成的NiWS活性相数量有关 .同时 ,助剂Ni的引入使得催化剂表面WS2 晶粒的堆叠程度略有增加 ,晶片长度略有减小 ;而且引入助剂后WOx 相的硫化度提高了近 2 0 % .但相比之下 ,活性相织构的变化和硫化度的增大对催化脱硫活性的贡献较小 。左东华 聂红 Michel Vrinat 石亚华 Michel Lacroix 李大东 2004催化学报2004,25,4:33
2硫化态NiW/Al_2O_3催化剂加氢脱硫活性相的研究Ⅱ.程序升温还原表征显示文摘采用程序升温还原法对一系列具有相同W含量和不同Ni含量的硫化态NiW /Al2 O3 催化剂进行了表征 ,以考察催化剂中不同硫物种的数量及还原性能 .结果表明 ,含有助剂Ni的催化剂的TPR谱在 6 73~ 873K出现了一个还原峰 ,归属为催化剂的NiWS混合相被分解生成的硫化镍物种的还原 .随着助剂Ni含量的增加 ,与该还原峰相应的H2 S生成量增大 ,表明形成了更多的NiWS活性相 .另外 ,Ni/ (Ni+W )原子比为 0 4 1的催化剂样品的噻吩加氢脱硫活性随着还原温度的升高而急剧下降 ,证实了催化剂在还原过程中活性相被逐步分解 .左东华 聂红 Michel Vrinat 石亚华 Michel Lacroix 李大东 2004催化学报2004,25,5:7
3硫化态NiW/Al_2O_3催化剂加氢脱硫活性相的研究Ⅲ.低温CO吸附-原位红外光谱表征显示文摘采用低温CO吸附 原位红外光谱法对硫化态和经过氢还原处理的W /Al2 O3 ,Ni/Al2 O3 以及不同Ni含量的NiW/Al2 O3催化剂进行了表征 .结果表明 ,在WS2 相上的两个CO特征吸收峰分别位于 2 117和 2 0 6 6cm-1处 ;硫化镍上吸附CO的特征峰位于 2 0 98cm-1处 ;NiW /Al2 O3 催化剂中引入的助剂Ni与WS2 相之间相互作用 ,并分别在 2 12 8,2 0 96和 2 0 78cm-1处出现三个新的谱峰 ,标志着NiWS活性相的形成 ,并且NiWS相的量随着助剂Ni含量的增加而增大 .在不同温度下对NiW/Al2 O3催化剂进行氢还原处理时发现 ,NiWS活性相在高温下逐步分解 ,并发生烧结 .以上结果有力地支持了前文中通过XPS ,HREM和TPR等方法所获得的有关催化剂活性相的形成及其还原分解过程的表征结果 .左东华 Francoise Mauge 聂红 Michel Vrinat 石亚华 Michel Lacroix 李大东 2004催化学报2004,25,5:4
4Transport of particulate material and dissolved tracer in a highly permeable porous medium: comparison of the transfer parameters显示文摘Nicolas Massei Michel Lacroix Hua Qing Wang Jean-Paul Dupont 2002Journal of Contaminant Hydrology2002,,1:2
5硫化态PtMo/γ-Al_2O_3催化剂活性位的低温CO-FTIR方法表征及噻吩HDS活性的研究显示文摘A series of sulfided PtMo/ γ Al 2O 3 catalysts[ w (Mo)=9.0%] with different contents of Pt were characterized by using low temperature FTIR spectroscopy of adsorbed CO, while their HDS activity was investigated with thiophene as a model substrate. Experimentally, it was found that no existence of the bands related to the surface complexes of Al 3+ ←CO and Pt 0←CO→Pt 0 was observed at 77 K and that the rate of the thiophene HDS reaction(573 K) is well linearly proportional to the area of the Pt 0←CO band at 2 093 cm -1 with a higher extrapolated HDS rate compared to that of sulfided Mo/ γ Al 2O 3 catalyst at the zero content of platinum. On the basis of the results here, the conclusion may be made that the active monolayer phase of Pt Mo S may be formed over sulfided PtMo/ γ Al 2O 3 catalysts during the sulfidation process and that both Mo 2+ and Pt 0 sites for CO adsorption should be the active reaction centers of thiophene HDS.齐兴义 郭林 李文钊 辛勤 Michel Lacroix Michel Vrinat Francoise Mauge 2002高等学校化学学报2002,23,7:1
6Cardiac hazard associated with eating habits. A case of infected intrapericardial foreign body due to an ingested toothpick显示文摘Stéphanie Lacroix Annie Ferland Philippe Gilbert Michel Lemieux Luc Bilodeau P. Poirier 2009Canadian Journal of Cardiology2009,,7:1
7Vision‐based absolute navigation for descent and landing显示文摘Bach Van Pham Simon Lacroix Michel Devy 2012J Field Robotics2012,,4:1
8Transport of particulate material and dissolved tracer in a highly permeable porous medium: comparison of the transfer parameters显示文摘Nicolas Massei Michel Lacroix Hua Qing Wang Jean-Paul Dupont 2002Journal of Contaminant Hydrology2002,,:1
9Polyphenolic compounds as functional ingredients in cheese显示文摘Jaejoon Han Michel Britten Daniel St-Gelais Claude P. Champagne Patrick Fustier Stéphane Salmieri Monique Lacroix 2010Food Chemistry2010,,4:1
10Diabetes and risk of pancreatic cancer: a pooled analysis from the pancreatic cancer cohort consortium显示文摘Joanne W. Elena Emily Steplowski Kai Yu Patricia Hartge Geoffrey S. Tobias Michelle J. Brotzman Stephen J. Chanock Rachael Z. Stolzenberg-Solomon Alan A. Arslan H. Bas Bueno-de-Mesquita Kathy Helzlsouer Eric J. Jacobs Andrea LaCroix Gloria Petersen Wei Zh 2013Cancer Causes & Control2013,,1:1
11Transport of particulate material and dissolved tracer in a highly permeable porous medium: Comparision of the transfer parameters 显示文摘Massei Nicolas Lacroix Michel Wang Huaqing 2002Journal of Contaminant Hydrology2002,57,5:1
12Predictive Factors for Ipsilateral Recurrence After Nephron-sparing Surgery in Renal Cell Carcinoma显示文摘Jean-Christophe Bernhard Allan J. Pantuck Hervé Wallerand Maxime Crepel Jean-Marie Ferrière Laurent Bellec Sylvie Maurice-Tison Grégoire Robert Baptiste Albouy Gilles Pasticier Michel Soulie David Lopes Bertrand Lacroix Karim Bensalah Christian Pfister Ro 2010European Urology2010,,6:1
13Transport of particulate material and dissolved tracer in a highly permeable porous medium: comparison of the transfer parameters显示文摘Nicolas Massei Michel Lacroix Hua Qing Wang Jean-Paul Dupont 2002Journal of Contaminant Hydrology2002,,1:1
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