Search

Steel slag derivates prepared from waste steel slag using acid leach method, are employed to promote hydrogen production from organic solid waste by in-line pyrolysis-steam reforming of Chinese medicine residues (CMR). The optimum pyrolysis conditions are determined during the fast pyrolysis experiment of CMR (T prolysis = 800 °C, F N2 = 200 mL STP /min). During in-line pyrolysis-reforming of CMR with steel slag derivates, for example CaO(SS)-50 wt%LR compounds, as reforming catalyst, the hydrogen yield is profoundly increased from 7.57 mmol/g CMR (pyrolysis operation) to 11.49 mmol/g CMR , while tar yield has been reduced 30.50%. FeO x in LR remarkably increases lattice oxygen and adsorption oxygen in NCA-LR or NCA-LR-CaO(SS) compounds, so tar and CO conversion are efficiently improved while coke deposition on catalyst surface is significantly reduced. LR is demonstrated to be able to act as or partially alternate nickel-based catalyst during steam reforming of pyrolysis gas, which would greatly reduce the cost of hydrogen production from OSWs. • Comprehensive utilization of typical organic solid waste and steel slag for hydrogen production. • A hydrogen yield of 15.13 mmol/g CMR was achieved at T reforming of 700 °C with CaO(SS)-20 wt%LR as catalyst. • Steel slag derivates effectively promoted tar conversion and reduced carbon deposition. • LR could act as or partially alternate nickel-based catalyst during steam-volatiles reforming. [ABSTRACT FROM AUTHOR]