Electricity and Process Heat Generation from Rice Husk Utilizing Technology of Separate Reactors for Pyrolysis and Gasification Focused on a Rice Mill

Sammanfattning

Agricultural biomass to energy holds promise for the sustainability of energy production and positive reduction of CO2 emission. This thesis explores the potential of rice husk as a sustainable energy source for electricity and process heat generation focusing on a rice mill in Sri Lanka. It utilizes advanced thermochemical conversion technologies specifically separate reactors for pyrolysis and gasification to optimize the conversion of rice husk biomass into Bio-char and syngas. The research involves field studies, process modelling with Aspen Plus software, and analysis of the biochemical properties of rice husk. Findings reveal that biomass is a viable and significant energy source by evaluating operational parameters and technological efficiencies. The use of rice husk-derived syngas in a gas turbine cycle and the subsequent utilization of waste heat for process heating are highlighted, underscoring the potential to enhance energy security and the efficient use of agricultural waste. In conclusion, the study suggests that such technologies could substantially achieve the energy needs of local rice mills and strengthen the national grid, supporting a transition toward renewable energy sources in Sri Lanka