Globally Green House Gas emission becomes a large environmental problem since the industrial revolution began. Power plants, boilers, and some machines are emitting a high amount of Green House Gasses to the atmosphere. Throughout the gasses, CO2 especially plays a significant role, because its contribution is very high compare to the others. So, we need to find solutions to mitigate CO2 emission. Our study mainly depends on post-combustion technology under the chemical absorption process, because it has a wide variety of technical usability. Furthermore, this study covers the solvent types, selection, and alternative solvents. This paper mainly reveals the industrial process like cement industry, coal fire power plants, aluminium plants, and fired power plants. We finally discussed the challenges of the chemical absorption process.