Alkane activation with single and bimetallic catalysts
Methods, compositions, and articles of manufacture for alkane activation with single- or bi-metallic catalysts on crystalline mixed oxide supports.
1. A method for non-oxidative coupling of methane comprising:
synthesizing a bimetallic catalyst on a SiO 2 support by:
grafting cobalt or molybdenum on the SiO 2 support forming a grafted SiO 2 support;
impregnating platinum on the grafted support, forming the bimetallic catalyst;
exposing methane to the bimetallic catalyst; and
converting methane to ethylene with an initial conversion of 8%.
2. The method of claim 1 , wherein the bimetallic catalyst has an initial selectivity in the conversion of methane to ethylene of at least 80%.
3. The method of claim 1 , wherein the conversion of methane is at a temperature of between 550° C. and 650° C.
4. The method of claim 1 , wherein the synthesizing further comprises, prior to impregnating, calcining the grafted SiO 2 support.
5. The method of claim 4 , wherein grafting comprises sequential grafting method.
6. The method of claim 5 , wherein sequential grafting comprises strong electrostatic adsorption.
7. The method of claim 6 , wherein the impregnating comprises incipient wetness impregnation.