West African countries are faced to a lack of access to modern energy such as electricity which can compromise their economic development. In the case of Burkina Faso the electricity production policies must considered energy sources such as agricultural residues (cotton stalks) in order to ensure economic growth. Indeed, Burkina Faso is a great African cotton producer. Thus, the cotton stalks (CS) can be converted into gas by the gasification technology for electricity production. The limit of the gasification is related to the gas quality. Indeed, the produced gas may contain significant amounts of tar which condense at low temperatures, leading to mechanical problems in the engines and in turbines.
Removing of tar from the gas engenders a considerable increase of the kWh production cost as a result of investment in the gas scrubber. The volatile matter content in the biomass is at the origin of tar formation during the gasification. Thus, reducing volatile matter content in raw biomass could reduce the tar content of the gasification gas. Torrefaction and carbonization reduces the volatile matter content and this process can be implemented easily in rural areas. It should be noted that the research results on tar production during the gasification of torrefied or carbonized biomass are scarce.
No comments:
Post a Comment