Gasification characteristics of corn stalk in an internal circulating fluidized bed gasifier based on the CPFD method

Gasification ranks among the most significant approaches for biomass usage, the gasification characteristics of corn stalk in a laboratory-scale internal circulating fluidized bed gasifier were investigated using the computational particle fluid dynamics method. We analyzed how temperature, equivalence ratio (ER), and steam-to-biomass ratio (S/B) influence gasification characteristics. The results showed that as the gasification temperature increased from 700 to 900 °C, the molar fractions of CO and H2 in the product gas increased from 12.9% and 9.6% to 16.6% and 13.3%, respectively, with the low calorific value of the product gas, in turn, showing an increase from 5.4904 to 5.6402 MJ/m3. As the ER value rose from 0.21 to 0.31, the rate of carbon conversion experienced a rise from 73.55% to 78.32%. As there was an increase in the S/B value from 0.2 to 0.8, there was a rise in the molar fraction of H2 starting from 11.5% to 15.3%; in contrast, the mole fractions of CO and CH4, in turn, decreased from 14.8% and 6.9% to 12.9% and 5.5%.