Dual catalyst processes and systems for propylene production

A process for producing propylene, the process comprising:

• metathesizing at least a portion of butene in a feed stream in a metathesizing reaction zone comprising a metathesis catalyst to form a metathesis reaction product, the metathesis catalyst comprising a mesoporous silica-alumina catalyst support impregnated with at least one metal oxide, where the mesoporous silica-alumina catalyst support comprises from 5 weight percent to 50 weight percent alumina based on the weight of the mesoporous silica-alumina catalyst support;
• passing the entire metathesis reaction product to a cracking reaction zone comprising a cracking catalyst, the cracking catalyst comprising an MFI structured silica-containing catalyst;
• and
• subjecting the metathesis reaction product to cracking in the cracking reaction zone to form a cracking reaction product, wherein at least a portion of the metathesis reaction product is cracked by the cracking catalyst and the cracking reaction product comprises propylene.