This paper presents models for the calculations of the costs involved and the general material balances during the conversion of the biomass into the final products. These models deal primarily with the conversion processes through thermochemical processing of biomass including gasification, combustion, and pyrolysis. The models were developed in the MATLAB environment, all with Graphic User Interface (GUI), meaning that they interact with the user through windows and dialogs instead of through user-input commands. The user only needs to insert values in the model inputs and click a button or two, and the models will be able to generate the results. 

Keywords— Graphic User Interface Model; biomass; bio-products; combustion; gasification; pyrolysis