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The gas absorption process for CO 2 separation from gas streams is of high interest in various applications in chemical, oil, and gas industries, as well as in environmental protection. The choice of a certain amine (single or blended amine) for CO 2 capture is mainly based on the absorption capacity, reaction kinetics, and regenerative potential and facility. The application of sterically hindered amines in gas-treating technology offers absorption capacity, absorption rate, and degradation resistance advantages over conventional amines for CO 2 removal from gases. The aim of this review is to bring an update of different aspects concerning several binary and multicomponent systems of CO 2 -sterically hindered amine-based absorbents essential for the design and operation of absorption equipment (physical properties like density, viscosity, vapor pressure, heat capacity and heat of absorption, CO 2 and amine diffusivity, CO 2 absorption capacity and kinetics, regeneration capability).