Influence of the interaction among three biomass components on gasification characteristics

In this study, the mass ratio of hemicellulose to lignin in biomass was changed to explore the interaction among three components of biomass in the gasification process. The experimental values were compared with the predicted values based on the gasification data of each single component. In the experiment, the reaction temperature was 1000 degrees C, and the air equivalent ratio was 0.25. The obtained gas components and gasification indexes showed that the interaction among three components was significant. Under the mass ratio of cellulose:hemicellulose:lignin = 5:4:1, hemicellulose, respectively, improved H-2 yield, carbon conversion efficiency, gasification efficiency, and calorific value by 44.58%, 22.05%, 19.60%, and 18.50% in contrast to the predicted values. Under the mass ratio of cellulose:hemicellulose:lignin = 5:1:4, lignin increased the tar yield to 4.46 mg/g and the percentage increase reached 75.59%. In addition, the experimental results of ash showed that both straw ash and pine ash improved the yields of H-2 and CO and gasification efficiency, and the improvement effect of pine ash was better. The experimental results of component connection morphology showed that the actual component connection morphology of biomass inhibited the formation of H-2 and CO, reduced the gasification efficiency, and promoted the formation of tar. Published under an exclusive license by AIP Publishing.

Automated summary

This study explored the interaction among the three components of biomass in the gasification process by changing the mass ratio of hemicellulose to lignin. The experimental results showed significant interaction among the components, with different ratios leading to different effects on gas yields and gasification efficiency.