The energy requirement of the amine based CO₂ capture process is the main drawback of the technology. Studies on energy demand reduction are therefore important. This work presents energy optimization and economic analysis of an 85% CO₂ capture process using pure monoethanolamine (MEA), and processes with blends of methyl diethanolamine (MDEA) and piperazine (PZ). The process with 30 wt% MEA was the base (reference) case in this study. The regeneration energy requirement for the base case was 3.77 GJton CO2 . The blends of (30 wt% MEA+5 wt% PZ) and (30 wt% MEA+15 wt% MDEA) achieved 4.9% and 7.5% reduction in regeneration energy respectively. The economic analysis also indicated that 4.1% and 4.3% total annual cost savings can be achieved by the MEA+PZ and MEA+MDEA blends processes respectively. The work further shows that the cyclic capacity is enhanced by using these blends instead of pure MEA.