Partial oxidation of methane to produce syngas over a neodymium–calcium cobaltate-based catalyst

• A catalytic activity of NdCaCoO4 in POM reaction was investigated.
• A decomposition of NdCaCoO4 at POM conditions results in the formation of finely dispersed Nd2O3, CaO and Co particles.
• The NdCaCoO4-derived catalyst showed conversion of CH4 and selectivity of CO and H2 higher than 90%.
• No activity and selectivity decrease was observed for 140 h of POM reaction.

Synthesis gas production by partial oxidation of methane (POM) (CH4/O2 = 1.8–4.5/1) at 850–960 °C over NdCaCoO3.96 was investigated using a fixed bed flow-type reactor. The NdCaCoO3.96-derived catalyst demonstrated conversion of CH4 and O2 up to 90% while CO and H2 selectivities were over 90% at a H2/CO ratio ∼2. The decomposition of NdCaCoO3.96 at POM conditions results in the formation of finely dispersed Nd2O3, CaO, cobalt oxides and cobalt metal. The as-prepared catalyst exhibited excellent stability of the catalytic properties, and no activity decrease was observed for 140 h of reaction. Synthesis gas formation was accompanied by carbon deposition on the catalyst. However, this process has little or no influence on the catalytic properties of the material.

Figure optionsDownload high-quality image (126 K)Download as PowerPoint slide