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The energy consumption associated with absorbent regeneration remains the most critical challenge for the industrial implementation of chemisorption based CO₂ capture processes. Aimed at reducing the energy consumption, this paper proposes a promising process modification of the ammonia (NH₃) based CO₂ capture process that involves an advanced flash stripper with a cold rich split. We investigated the techno-economic performance of the advanced NH₃ process integrated with a 650 MW coal-fired power plant, and evaluated it technical and energy performance using a rigorous, rate-based model in Aspen Plus. A sensitivity study was also performed to optimise the modelling parameters, i.e. the stripper pressure and the absorbent NH₃ concentration, and minimize the regeneration duty. A very competitive regeneration duty of 1.86 MJ/kg CO₂ was achieved for an optimised stripper pressure of 12 bar …