Centre National De La Recherche Scientifique

Universite Claude Bernard – Lyon1

Ecole Superieure De Chimie Physique Electronique De Lyon

Toyota Motor Europe

Total Raffinage Chimie

Université Claude Bernard Lyon I

Kai Chung Szeto

Mostafa Taoufik

Marc-Olivier Charlin

Cherif Larabi

Cesar Rios Neyra

Phuc Hai Nguyen

A process for preparing a catalyst material, includes the steps of: (a) providing a support material having surface hydroxyl (OH) groups, wherein the support material is ceria (CeO), zirconia (ZrO) or a combination of thereof; (b) reacting the support material having surface hydroxyl (OH) groups of step (a) with a precursor containing two transition metal atoms, each chosen independently from the group consisting of: W, Mo, Cr, Ta, Nb, V, Mn; (c) calcining the product obtained in step (b) in order to provide a catalyst material showing dual site surface species containing pairs of transition metal atoms derived from the precursor that are present in oxide form on the support material. Additionally, a catalyst material is obtained by the process set out above, and the catalyst material is used as an ammonia selective catalytic reduction (NH-SCR) catalyst for nitrogen oxides (NOx) reduction.

Supported oxide NH-SCR catalysts with dual site surface species and synthesis processes

The disclosure relates to a selective head-to-head dimerization of conjugated diene compounds by a catalytic process in a reaction medium without solvent or with solvent comprising hydrocarbons, in the presence of a specific additive of the phenol type.

Catalytic process for diene dimerization

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Villeurbanne, France

Kai Chung Szeto