In this thesis, a modelling approach to model soot emissions for a Rich Burn-Quick Quench- Lean Burn (RQL) type aero engine combustion chamber will be presented. The sot emissions will be modelled by coupling Chemical Reactor Network (CRN) approach with Method of Moments with Interpolative Closure (MOMIC), a detailed soot formation model. The developed approach will be first validated by comparing it with well-established experimental cases that include progress of multiple species along with soot concentrations. After the validation, a sensitivity study on the developed modelling approach will be conducted to investigate the model’s behaviour for extended combustion conditions. Lastly, the developed modelling approach will be applied to estimate the soot emissions along with other major emissions of a RQL combustion chamber for various power settings.