Oxidative coupling of methane-comparisons of MnTiO-NaWO and MnO-TiO-NaWO catalysts on different silica supports.

The oxidative coupling of methane (OCM) converts CH to value-added chemicals (C), such as olefins and paraffin. For a series of MnTiO-NaWO (MnTiO-NW) and MnO-TiO-NaWO (Mn-Ti-NW), the effect of loading of MnTiO or MnO-TiO, respectively, on two different supports (sol-gel SiO (SG) and commercial fumed SiO (CS)) was examined. The catalyst with the highest C yield (21.

Synthesis of Value-Added Chemicals via Oxidative Coupling of Methanes over NaWO-TiO-MnO /SiO Catalysts with Alkali or Alkali Earth Oxide Additives.

NaWO-TiO-MnO /SiO (SM) catalysts with alkali (Li, K, Rb, Cs) or alkali earth (Mg, Ca, Sr, Ba) oxide additives, which were prepared using incipient wetness impregnation, were investigated for oxidative coupling of methane (OCM) to value-added hydrocarbons (C). A screening test that was performed on the catalysts revealed that SM with Sr (SM-Sr) had the highest yield of C. X-ray photoelectron spectroscopy analyses indicated that the catalysts with a relatively low binding energy of W 4f facilitated a high CH conversion.