Dual catalyst system for propylene production

A process for production of propylene comprising:

• providing a dual catalyst system comprising:
• a mesoporous silica catalyst impregnated with metal oxide, where the mesoporous silica catalyst includes a pore size distribution of about 2.5 nm to about 40 nm and a total pore volume of at least about 0.600 cm3/g, and
• a mordenite framework inverted (MFI) structured silica catalyst that includes a total acidity of 0.001 mmol/g to 0.1 mmol/g, where at least a portion of the MFI structured silica catalyst is in contact with the mesoporous silica catalyst, and
• producing propylene from a stream comprising butene via metathesis and cracking by contacting the stream comprising butene with the dual catalyst system, wherein the stream comprising butene contacts at least a portion of the mesoporous silica catalyst before contacting the MFI structured silica catalyst.

A process for production of propylene comprising:

• providing a dual catalyst system comprising:
• a mesoporous silica catalyst impregnated with metal oxide, where the mesoporous silica catalyst includes a pore size distribution of about 2.5 nm to about 40 nm and a total pore volume of at least about 0.600 cm3/g, and
• a mordenite framework inverted (MFI) structured silica catalyst directly downstream of the mesoporous silica catalyst, where the MFI structured silica catalyst includes a total acidity of 0.001 mmol/g to 0.1 mmol/g,
• where the mesoporous silica catalyst is disposed in a first reactor, the MFI structured catalyst is disposed in a second reactor, and a direct conduit extends between the first reactor and the second reactor, and
• producing propylene from a stream comprising butene via metathesis and cracking by contacting the stream comprising butene with the mesoporous silica catalyst and the MFI structured silica catalyst, where the stream comprising butene contacts the mesoporous silica catalyst before contacting the MFI structured silica catalyst.