(140f) The Effect of CO2 Adsorbent to the H2 Production in Biomass Gassifier

Biomass gasification has become one of the most popular methods to produce biohydrogen.  Hydrogen yield has been proven to further increase by adding CO₂ adsorbent into the biomass gasifier. The proposed CO₂ adsorbent for biomass gasification system is Calcium Oxide (CaO) as it is converted to solid Calcium Carbonate (CaCO₃) as it reacts with CO₂ in the gasifier. Due to its high density, the solid CaCO₃ produced can be easily removed from the system and it will accumulate at the bottom of the gasifier. This paper highlights the study on the effect of CO₂ adsorbent to the H₂ production from the gasifier using CFD approach. The results show that the addition of CO₂ adsorbent helps to increase the H₂ production. The simulation was done for two different cases, which are gasification process with in-situ CO₂ adsorption and without adsorbent.  The reaction temperature for both cases ranging between 500-900 ⁰C. From the results obtained, it is observed that the addition of CO₂ adsorbent does improve the H₂ production by 12%.