Effect of ceria on the MgO-γ-Al2O3 supported CeO2/CuCl2/KCl catalysts for ethane oxychlorination

Halogen-Mediated Conversion of Hydrocarbons to Commodities

“…713 K for 90% alkane conversion) owing to the difficulty of activating the strong C-H bond in ethane molecule. [174][175][176][177] At these temperatures, the formation of undesired over-chlorinated compounds (both saturated and unsaturated) and carbon oxides is observed.…”

“…50%), with ethylene being the major by-product. 176,178 In general, ethylene, ethyl chloride, and VCM are the major products of this reaction. Copper-based catalysts usually show a better selectivity to VCM, while ethyl chloride and ethylene are the predominant products over non-copper catalysts (Table 3).…”

“…The Cu 2+ /Cu + redox pair was acknowledged to manipulate the release of Cl2 by the decomposition of CuCl2 to Cu2Cl2. 176,183 Ethyl chloride was regarded as the primary product, and ethylene was obtained by its dehydrochlorination. The rest of the reaction network follows roughly the Ethane oxychlorination over both catalysts can take place readily below 673 K. Besides, the valence states of Ru and La were stable after these catalysts were subjected to oxychlorination ambience.…”

Dual catalyst system for selective vinyl chloride production via ethene oxychlorination

“…18 In addition, similar to the beneficial effects that ceria provides when used as a carrier, 19 appropriate carriers for CeO 2 could promote the EDC-to-VCM conversion step by introducing acid functionalities that are required for this reaction. 14,16,17,[20][21][22][23][24][25] In fact, as reported in the literature, several acid materials, such as Al 2 O 3 or Pt-Cu/SiO 2 , are active in EDC dehydrochlorination. 20,26 If applied as active carriers or co-catalysts for CeO 2 , these materials can allow integration of oxychlorination and dehydrochlorination reactions in a single catalytic system.…”

A comparative study of Y3+- or/and La3+-doped CeO2–ZrO2-based solid solution

“…The peak at around 400°C is ascribed to the reduction of surface capping oxygen (O 2À , O) species due to the defects of structure and electronic properties of nonstoichiometric ceria. 23 For CZ, a single broad reduction peak centered at 580°C is observed. For CZY, a broad reduction peak at 562°C with two small peaks at 180 and 218°C (local) are observed, indicating that there are at least two types of adsorbed surface oxygen species located at lower temperatures and the reduction peak centered at 562°C could be assigned to the Ce 41 reduction of surface or subsurface.…”