Process simulation of the fusion decoupling combustion for biomass

Area of Science:

• Combustion Engineering
• Biomass Energy Conversion
• Environmental Engineering

Background:

• High temperatures in combustion can cause coking and slagging.
• Decoupling combustion technology offers a potential solution to mitigate these issues.

Purpose of the Study:

• To propose and evaluate a fusion decoupling combustion technical scheme.
• To analyze its effectiveness in biomass conversion and emission reduction.

Main Methods:

• A fusion decoupling combustion scheme was designed, dividing the process into gasification and combustion stages.
• An Aspen Plus process model was developed and validated against experimental data.

Main Results:

• The scheme achieved complete conversion of carbon in raw biomass.
• Increasing the equivalence ratio (ER) decreased the lower heating value (LHV) of the product gas.
• Preheating temperature adjustments influenced H2 and CO content but maintained LHV.
• Optimizing the Air1 ratio and preheating temperature reduced NOx emissions below 70 mg/m³.

Conclusions:

• The fusion decoupling combustion scheme effectively converts biomass with complete carbon utilization.
• The proposed method offers a viable strategy for reducing NOx emissions in combustion processes.