Hydrodearomatization of Model Monoaromatics Over Ni/Al2O3: Theoretical and Experimental Approaches

International audienc

Silanol defects engineering and healing in zeolites: Opportunities to fine-tune their properties and performances

International audienceZeolites have been game-changing materials in oil refining and petrochemistry over the last 60 years and have the potential to play the same role in the emerging processes of the energy and environmental transition. Although zeolites are crystalline inorganic solids, their structures are not perfect and the presence of defects sites-mainly Brønsted acid sites and silanols-influences their thermal and chemical resistance as well as performances in key areas such as catalysis, gas and liquid separations and ion-exchange. In this paper, we review the type of defects in zeolites and the characterization techniques used for their identification and quantification with the focus on diffraction, spectroscopic and modeling approaches. More specifically, throughout the review, we will focus on silanol (Si-OH) defects located within the micropore structure and/or on the external surface of zeolites. The main approaches applied to engineer and heal defects and their consequences on the properties and applications of zeolites in catalysis and separation processes are highlighted. Finally, the challenges and opportunities of silanol defects engineering in tuning zeolites properties to meet the requirements for specific applications are presented

St. John's Daily Star, 1920-11-16

The St. John's Daily Star was published daily except Sunday between 17 April 1915 - 23 July 1921

Opportunities in defects engineering and healing in zeolites. Plenary

International audienc

Light olefin synthesis from a diversity of renewable and fossil feedstocks: state-of the-art and outlook

International audienceThis review highlights fundamental and applied aspects of the synthesis of light olefins from a variety of renewable and fossil feedstocks and looks at future trends and opportunities

Embryonic ZSM-5 zeolites: zeolitic materials with superior catalytic activity in 1,3,5-triisopropylbenzene dealkylation

International audienc

Study of Ir/WO3/Al2O3 ring opening catalysts

International audienceThe present paper investigates the development of Ir-based catalysts supported on tungstated aluminas for the ring opening reaction of naphthenic molecules using methylcyclohexane (MCH) as a model compound. A series of tungstated aluminas WOx/Al2O3 containing up to 6.0 at.W/nm(2) was prepared. Ir-based catalysts containing 1.2 wt% were obtained by impregnation of these solids. The performance of Ir/WO3/Al2O3 catalysts for methyl cyclohexane ring opening was found to be similar to that observed over the corresponding zirconia-based system indicating that the metal-acid balance (and not the nature of the support) is the key parameter for optimum performance. (C) 2010 Elsevier B.V. All rights reserved

Study of Ir/WO3/Al2O3 ring opening catalysts

International audienceThe present paper investigates the development of Ir-based catalysts supported on tungstated aluminas for the ring opening reaction of naphthenic molecules using methylcyclohexane (MCH) as a model compound. A series of tungstated aluminas WOx/Al2O3 containing up to 6.0 at.W/nm(2) was prepared. Ir-based catalysts containing 1.2 wt% were obtained by impregnation of these solids. The performance of Ir/WO3/Al2O3 catalysts for methyl cyclohexane ring opening was found to be similar to that observed over the corresponding zirconia-based system indicating that the metal-acid balance (and not the nature of the support) is the key parameter for optimum performance. (C) 2010 Elsevier B.V. All rights reserved

Study of Ir/WO3/Al2O3 ring opening catalysts

International audienceThe present paper investigates the development of Ir-based catalysts supported on tungstated aluminas for the ring opening reaction of naphthenic molecules using methylcyclohexane (MCH) as a model compound. A series of tungstated aluminas WOx/Al2O3 containing up to 6.0 at.W/nm(2) was prepared. Ir-based catalysts containing 1.2 wt% were obtained by impregnation of these solids. The performance of Ir/WO3/Al2O3 catalysts for methyl cyclohexane ring opening was found to be similar to that observed over the corresponding zirconia-based system indicating that the metal-acid balance (and not the nature of the support) is the key parameter for optimum performance. (C) 2010 Elsevier B.V. All rights reserved