A dynamic model of biomass gasification in a circulating fluidized bed as a tool for optimising designand operation
conference paper
Biomass gasification, followed by a combined cycle seems to be an attractive option to generate electricity from sustainable sources. However using wood gas in engines is difficult due to tar, variations in calorific value of the gas and variations in volume flux. A dynamic model of an !BGCC installation helps to improve design and operation of these install ations, to the point where they are economically feasible. Such a model should be highly modular. It is proposed to make a model consi sting of four independent modules: preparation, gasifier, gas cleaning and combined cycle. The models of these modules will be based on first principles. As an example, the modelling approach for the gasifier is shown.
In the gasifier, the riser is the most important part. It is shown how a system of mass, momentum and energy balances, together with a population balance equation and a particle model can describe the riser. The population balance equation is a powerful tool to translate single particle behaviour to full scale reactor behaviour. A simple riser model demonstrates the use of this tool.
In the gasifier, the riser is the most important part. It is shown how a system of mass, momentum and energy balances, together with a population balance equation and a particle model can describe the riser. The population balance equation is a powerful tool to translate single particle behaviour to full scale reactor behaviour. A simple riser model demonstrates the use of this tool.
TNO Identifier
530388
Source title
Biomass for energy and industry : 10th european conference and technonology exhibition