The bioliq process has been designed to produce synthetic second generation fuels from biomass including agriculture residues. It involves the production of a biomass based suspension fuel/slurry through a pyrolysis process, its gasification at high pressure, subsequent cleaning/conditioning of the syngas and gasoline synthesis. An essential element of the process is the entrained flow gasifier which is equipped with a membrane wall cooling screen. It is designed for 5 MW_(thermal) input and can be operated at a nominal pressure of 40 or 80 bar. The paper presents the CFD-based numerical simulations which have been carried out in the design phase of the oxygen-blown gasifier. A number of numerical simulations have been performed to analyse the effect of alterations in the burner/gasifier inputs on the fluid flow, temperature and concentration fields inside the gasifier. The essential criterion in assessing the design options is the chemical composition of the syngas, the conversion rate of the fuel as well as the gasifier exit temperature since all parameters affect the cold gas efficiency. The paper shows parameter studies for the design of the gasifier and a first comparison of data produced with slurry gasification in the bioliq gasifier.
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