Effect of CO2/propane ratio and trimetallic oxide catalysts on maximizing dry reforming of propane

•High CO2/propane ratio approach was effective strategy to increase the syngas (H2 and CO) product over trimetallic catalysts.•Each trimetallic oxide catalyst consumed CO2 differently to promote CC and CH bonds dissociation of propane to syngas.•Addition of Fe and Be oxide of trimetallic catalysts promote the highest propane dry reforming (PDR) and achieved conversion 97% and 84%, respectively.•The highest yield of H2 (34.5–41.2%) and CO (60–68.3%) was achieved using 2%Fe/5%Zr/Ti and 2%Be/5%Zr/Ti and CO/H2 ratio was closed to the theoretical for PDR.