(9月20日)报告题目:From noble metal to non-noble bimetallic catalysts for selective
新闻类型:学术活动  阅读次数:  发布时间:2019-09-19

报告题目:From noble metal to non-noble bimetallic catalysts for selective hydrogenation of unsaturated impurities in alkene cuts.

报告人:Dr. Catherine Louis (法国索邦大学

报告时间:2019年9月20日(星期五)上午10:00-11:30

报告地点:福州大学阳光科技大厦北911室

报告摘要:

Light alkenes produced by catalytic cracking of petroleum contain a few percents of impurity of alkadienes or alkynes. These raw streams must be purified especially for further polymerisation processing whose level of impurity must be as low as 10 ppm. Ideally, the molecules of alkadienes or alkynes must be selectively converted to alkenes without further hydrogenation of the main alkene stream. Palladium-based catalysts are used in industry for gas- and liquid-phase selective hydrogenation. Palladium is highly active and selective; however, for ultimate purification at conversion close to 100%, alkene starts to be hydrogenated. To limit these problems, promoters such as Ag, Co, Cu, Cr, alkali metals, lead acetate and metal oxides are added to Pd catalysts.

The goal of the presentation is to summarize the work that was done in the laboratory on this topic in collaboration with several co-workers, and to show how gradually, our studies, which initially focused on monometallic Au catalysts [1], then shifted to bimetallic Au-Pd catalysts with Au/Pd atomic ratio >>1 [2], then to bimetallic Au-non noble metals (Au-Cu [3]) and more recently to bimetallic non noble metals (Cu-Zn [4]). We focused on the study of the reaction of selective hydrogenation of butadiene performed in an excess of propene (propene/butadiene ratio =100) to mimic the process of catalytic purification of butene cuts from impurities of butadiene (butene was replaced by propene but for analytical reasons).

References

1. A. Hugon, L. Delannoy, C. Louis, Gold Bull. 41 (2008) 127-138; Gold Bull. 42 (2009) 310-320.

2. A. Hugon, L. Delannoy, J.-M. Krafft, C. Louis, J. Phys. Chem. C114 (2010) 10823–10835; N. El Kolli, L. Delannoy, C. Louis , J. Catal. 297 (2013) 79–92.

3. L. Delannoy, C. Méthivier, C. Louis, G. Thrimurthulu, P. S. Reddy, B. M. Reddy, J. Nelayah, C. Ricolleau, Phys. Chem. Chem. Phys., 16 (2014), 26514-26527.

4. Z. Wang, L. Delannoy, C. Louis, J. Catal., 347 (2017) 185-196

个人介绍:

Dr Catherine Louis is Director of Research of the CNRS. She has been working in the Laboratoire de Réactivité de Surface of the Université Pierre et Marie Curie in Paris since 1982(Sorbonne Université since 2018), when she was appointed by the French National Centre of Research (CNRS).

In 1985, she received her PhD in Chemistry performed under the supervision of Professor Michel Che. From 1986 to 1988 she was a post-doctoral fellow, working with Professor Alex Bell at the University of California – Berkeley.

Her main research topic is the control of the preparation of supported metal catalysts, especially gold and bimetallic catalysts, the understanding the chemical phenomena involved during the synthesis, and the study of possible restructuration under reaction condition.

From 2006 to 2013, she was the director of the French CNRS network, entitled Or-Nano (for Gold Nanoparticles) gathering researchers working with Gold Nanoparticles (physicists, chemists and biologists). This network has again been approved by CNRS for the period 2017-2021.

She co-authored the very first book on “Catalysis by Gold” with Geoffrey C. Bond and David T. Thompson, co-edited the book entitled “Gold Nanoparticles for Physics, Chemistry, Biology in 2012 (2nd edition in 2017). She wrote a tenth of book chapters related to gold catalysts or catalyst preparation, and she is the co-author of around 150 scientific papers.

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