Progress of Cryogenics and Isotopes Separation , ISSN: 1582-2575
2014, Volume 17, Issue 1

Carbon Dioxide Reusing for Methane Fuel Obtaining Over Heterogeneous Catalysts as a Possible Source of Energy

Abstract

Using the carbon dioxide as a technological fluid for building complex block molecules or as a raw material in chemical processes (as a carbon source for fuels or in biotechnological applications) can provide the potential to reduce CO₂ emissions. In this paper, catalytic tests for carbon dioxide hydrogenation are investigated over nickel base catalysts on various supports, in a temperature range from 300 to 550°C under atmospheric pressure. The important parameters such us: the reaction temperature, H₂/CO₂ molar ratio and reproducibility tests are taken into account and optimized. The experiments indicate that by the increasing H₂/CO₂ molar ratio we get an increase of the CO₂ conversion up to 99.8% at 400-430°C. Temporal distributions of volumetric concentrations for CO₂, H₂ and CH₄ at various reaction conditions are presented.

This method possesses the merits of promising performances regarding the methanation process over a low cost catalyst and raw material, reusing CO₂ and generating CH₄ fuel as a possible source of energy.