Ammonia is used as flue gas conditioning agent from urea hydrolysis as there is no ammonia shipping, handling and storage is required. In this investigation equilibrium and kinetic studies on hydrolysis of urea to produce ammonia has been carried out in a semi-batch and batch reactor. This study revealed that conversion increases exponentially with increase in temperature but with increase in initial feed concentration of urea, the conversion decreases marginally. From the catalytic hydrolysis study in a semi-batch reactor for different catalytic (TiO2, fly ash, (Ni+Fe) and Al2O3), it has...