Catalytic transformation of carbon dioxide and methane into syngas over ruthenium and platinum supported hydroxyapatites

Bruna Rego de Vasconcelos (1) , Lulu Zhao (1) , Patrick Sharrock (1) , Ange Nzihou (1) , Doan Pham Minh (1)

1 RAPSODEE - Centre de recherche d'Albi en génie des procédés des solides divisés, de l'énergie et de l'environnement

This work focused on the catalytic transformation of methane (CH4) and carbon dioxide (CO2) into syngas (mixture of CO and H-2). Ruthenium- and platinum-based catalysts were prepared using hydroxyapatite (HAP) as catalyst support. Different methods for metal deposition were used including incipient wetness impregnation (IWI), excess liquid phase impregnation (LIM), and cationic exchange (CEX). Metal particle size varied in large range from less than 1 nm to dozens nm. All catalysts were active at 400-700 degrees C but only Pt catalyst prepared by Owl method (Pt/HAP IWI) was found stable. The catalytic performance of Pt/HAP IWI could be comparable with the literature data on noble metal-based catalysts, prepared on metal oxide supports. For the first time, water was experimentally quantified as a by-product of the reaction. This helped to correctly buckle the mass balance of the process.

Mots clés: Carbon dioxide; Hydroxyapatite; Methane; Platinum catalyst; Ruthenium catalyst; Syngas

Domaines: Génie chimique; Catalyse

Bruna Rego de Vasconcelos, Lulu Zhao, Patrick Sharrock, Ange Nzihou, Doan Pham Minh. Catalytic transformation of carbon dioxide and methane into syngas over ruthenium and platinum supported hydroxyapatites. Applied Surface Science, 2016, 390, pp.141-156. ⟨10.1016/j.apsusc.2016.08.077⟩. ⟨hal-01609114⟩