Thermodynamic analysis of biomass gasification with CO2 recycle for synthesis gas production

© Miroslav Vajdić

The authors are Paphonwit Chaiwatanodoma, Supawat Vivanpatarakijb, Suttichai Assabumrungrata, affiliated to Chulalongkorn University, Bangkok - Thailand.

Thermodynamic analysis of biomass gasification with recycled CO₂ was investigated in this work to determine optimum operation mode and CO₂/C ratio. Gasification System Efficiency (GSE), which takes into account the energy demand in the system, and CO₂ emission per syngas production (CO₂/Sg) were calculated to evaluate the performance of the gasification system. Considering the production of syngas at a H₂/CO ratio of 1.5, it was revealed that indirect gasification using biomass as fuel is the most efficient and environmental-friendly operation mode. The recycled CO₂ proves to increase syngas production. However, when considering the additional energy demand required for processing the CO₂ recycle, it was demonstrated that there are only some ranges of operating conditions (high pressure and low temperature) which offer the benefit of the CO₂ recycle. The optimum CO₂/C was reported to be around 0.1–0.2 for pressurized and low temperature gasification.

Applied Energy  Volume 114, February 2014, Pages 10–17

Affiliations:

Center of Excellence in Catalysis and Catalytic Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, Chulalongkorn University, Phyathai Road, Wang Mai, Phatumwan, Bangkok 10330, Thailand
Paphonwit Chaiwatanodoma

Suttichai Assabumrungrata

Energy Research Institute, Chulalongkorn University, Phyathai Road, Wang Mai, Phatumwan, Bangkok 10330, Thailand

Supawat Vivanpatarakijb

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