Optimization of MDEA-PZ Ratio and Concentration for CO2 Removal in Semi-Lean Membrane Contactor ProcessSyafiqa Saleh, Armansyah Razali, Rashid Hanafiah, Athirah Tamidi and Zhe Phak ChanE3S Web Conf., 287 (2021) 03009DOI: https://doi.org/10.1051/e3sconf/202128703009