Emission monitoring and control is now an important aspect of the technology deployment for CO2 capture. Especially formation of aerosols (mechanisms, conditions) and reduction/prevention of the aerosol formation to protect the environment is a crucial part of implementation of CCS technology. A unique infrastructure has been developed to generate H2SO4 aerosol droplets in-house, simulating the aerosols as observed in power and industrial plants. A wide range of H2SO4 concentrations and thus, particle number and size distribution can be obtained from this setup.