Indovinya aims to capture ethylene lost in the demethanizer tower that typically goes into fuel gas. The impact will be a reduction in the overhead temperature of the demethanizer by installing a two-stage turbo-expander and a new cold box to recover incremental ethylene. Energy is saved both from the recovery of ethylene from the residue gas stream and from unloading the refrigeration system. This results in significant energy savings: 158,227 MMBtu/year from recovered ethylene and 287,376 MMBTU/year from unloading propylene refrigeration. Cumulatively, the project reduces energy consumption by 445,603 MMBtu/year and lowers CO2 emissions by 23,661 tons/year.