Hydrogen-Rich Syngas Production By Dc Thermal Plasma Steam Gasification From Biomass And Plastic Mixtures

Recently, thermal plasma gasification has attracted much attention due to hydrogen-rich syngas production. In this research, wood sawdust and high density polyethylene (HDPE) mixtures have been investigated under plasma steam gasification with various HDPE contents (0-100%), at different input plasma powers (16-24 kW) and varying steam flow/carbon flow (S/C) ratios (0.2-1.8). The single-factor analysis indicates that the real H(2)yield at 80 wt% HDPE is 23.99% higher than the theoretically calculated results. This significant improvement in hydrogen yield confirms the synergetic gasification effects between HDPE and biomass. The yield and proportion of H(2)show a climbing trend with the increase of input power, while showing a trend from rising to descending with the increase of S/C ratio. Under the optimal conditions (the HDPE ratio of 80%, the input power of 22 kW, the S/C ratio of 1.0), the H(2)yield is as high as 78.55 mol kg(-1)and the proportion of H(2)in syngas reaches 66.91%. Redundancy analysis shows that the HDPE content, input power and S/C ratio can explain 39.8%, 12.4%, and 10.6% of the variations of syngas properties respectively. The input power has the largest correlation with the increase of H(2)yield among these three factors.