Sludge pyrolysis integrated biomass gasification to promote syngas: Comparison of different biomass

The sludge pyrolysis and biomass gasification (SPBG) integrated process has been demonstrated to promote hydrogen-rich gas generation from the two solid waste materials by interaction, however, the effect of biomass species is unclear. Six agriculture and forestry biomass were chosen to participate SPBG in the current study to monitor the roles of biomass on product evolution. The results revealed that SPBG has promoted the syngas for all the biomass samples with the gas yields increased by 10.30 %–38.90 %, while the H2 yields increased by 17.31 %–81.40 %. By statistical analysis, it can be concluded that H2 was mainly derived from the gasification reaction of the biomass char and water in the sludge volatile, followed by the cracking of tar, while H elements released from biomass were mainly transformed into CH4 and C2Hy. The syngas composition verified a lot for SPBG experiments with different biomasses. Cellulose intensifies the production of CO through CO bonds cracking on char, while hemicellulose intensifies the production of CH4 through tar polymerization. Therefore, biomass with higher concentrations of cellulose and hemicellulose exhibited improved performance in gas production.