Experimental Verification of the Space‐Charge Model for Electrokinetics in Charged Microporous Membranes

Abstract

The catalytic performance of A-La203, La(OH)3, II-La202C03, and La2(C03)3 for the catalytic oxidative coupling of methane to C2 hydrocarbons was investigated over a range of reaction temperatures (up to 850 °C). The activity of the starting materials for methane conversion and selectivity to ethylene and ethane were in the order II-La202C03 > La2(C03)3 > La(OH)3 > A-La203. Postreaction characterization by Fourier transform infrared spectroscopy and X-ray diffraction revealed that these materials undergo significant transformations. On the basis of this information, the presence of the oxycarbonate phase appears to have a beneficial effect on catalytic performance.