Title : Exploring the efficiency of CoAl-CO3 and CoFe-CO3 catalysts derived from hydrotalcite solids in the process of CO2 reforming of Methane
The development of novel metal-based complexes as catalysts for the production of synthesis gas via the process of dry reforming of methane (DRM). The target of several recent studies on natural gas reforming is shifted to the catalyst development for carbon dioxide reforming also named dry reforming of methane had attracted the attention of many environmental chemists in the past decades. The catalytic systems studied such as those derived from layered double hydroxides (LDHs) that contain large surface areas. The reduction of LDHs prompts the formation of small, thermally stable, metal particles that can minimize the sintering of the cobalt catalyst and enhance chemisorption of carbon dioxide, thus, avoiding the formation of coke. The Double layered hydroxides (LDH) called anionic clays are the most studied laminated materials. The CoAl-LDH and CoFe-LDH hydrotalcite-like compounds were successfully synthesized by the co-precipitation method with Co2+/Al3+ = 2 and pH =12. After calcination under air at 800 °C. The solids were characterized by means of XRD, BET area, N2 adsorption and desorption, TPR-H2, chemical analysis by ICPs. Reforming of methane with carbon dioxide to synthesis gas, which is also referred to as dry reforming of methane (????????4 + ????????2 ↔ 2????2 + 2????????) represents an industrially relevant process that meets the criteria of green chemistry and of environmental protection: In this respect, CO2 and CH4, both considered as one of the main greenhouse gases responsible for out planet’s global warming phenomenon, are converted to furnish a more useful mixture of gas containing H2 and CO, syngas.After reduction, the catalysts were evaluated in the reforming of methane reaction under continuous flow with CH4/CO2 ratio equal to 1, at atmospheric pressure and a temperature range [500-700°C]. The catalytic activity was tested in a fixed bed reactor.