FSP designed Silica/Ceria-Zirconia supports for CO2 reforming of methane

Flame spray pyrolysis-designed silica/ceria-zirconia supports for the carbon dioxide reforming of methane
Unique SiO2/Ce0.7Zr0.3O2 structures synthesised by FSP for methane dry reforming

The carbon dioxide reforming of methane (DRM) which has the ability to consume carbon dioxide and convert methane to synthesis gas which can then be transformed to synthetic fuels such as diesel and methanol is one solution to address the presence of CO2 in the environment. Up until recently, work into DRM has focussed on improving the performance of transition metal catalysts such as Nickel (Ni) which has been found to affordable catalyst but suffered from few heldbacks such as deactivation due to sintering and carbon formation. To overcome the limitations of Nickel based catalysts, research has focuses on modifying support properties or varying Ni properties. In this work, we developed Flame spray pyrolysis (FSP) designed silica/ceria-zirconia particles with assorted structures as Ni catalyst support for the carbon dioxide of methane. Overall, using CeZr blended with Si as a Ni catalyst support promoted the activity and stability of the catalysts for the dry reforming of methane, primarily due to: (1) the introduction of OSC allowing the oxidation of formed carbon species and promoting carbon dioxide conversion, (2) the variation in the Ni deposit-support interaction with the different Si/CeZr structures, and (3) increasing the oxygen deficiency of the flame with increasing CeZr content resulting in the promotion of small, dispersed Ni.

Read full articles at App. Cat. A: General (doi:10.1016/j/apcata.2017.08.002)

Schematic representation of different reaction mechanism over (a) silica and (b) ceria/zirconia-based supports