Processes for converting olefins in plastic waste pyrolysis oil to alkene products

A process for converting olefins in plastic waste pyrolysis oil to at least an alkene product of chemical formula CmH2m, the process comprising contacting the plastic waste pyrolysis oil with two or more catalyst components in a reactor, the reactor comprising an alkene reactant of chemical formula CnH2n;

• where:
• m is an integer from 3 to 20 n is an integer from 2 to 20;
• the two or more catalyst components comprise a metathesis catalyst component and an isomerization catalyst component;
• and
• contacting causes at least a portion of the olefins in the plastic waste pyrolysis oil, or products derived therefrom, to undergo metathesis reactions and isomerization reactions to produce an effluent comprising at least the alkene product of chemical formula CmH2m.