Hydrogen-rich syngas production by chemical looping steam reforming of acetic acid as bio-oil model compound over Fe-doped LaNiO3 oxygen carriers

Abstract Ni-based perovskites are promising oxygen carriers for chemical looping steam reforming to produce H 2 -rich gas from organics. In this study, a series of Fe-doped LaNiO 3 perovskites with various Ni/Fe ratios (LaNi x Fe 1-x O 3 (0 ≤ x ≤ 1)) were investigated for chemical looping steam reforming of acetic acid as a model compounds of bio-oil. Results illustrated that although LaNiO 3 showed higher activity for gas production, the Ni–Fe bimetallic perovskites were more stable during the steam reforming reactions. It was found that Fe doping can promote the content of lattice oxygen in the perovskite which could be released during the steam reforming reaction, thus coking resistant of the perovskite was effectively improved. Among the LaNi x Fe 1-x O 3 (0 ≤ x ≤ 1) perovskites, LaNi 0.8 Fe 0.2 O 3 exhibited the best synergistic effect between Ni and Fe to achieve the highest H 2 /CO for H 2 -rich gas production. Operational variables of the steam reforming reactions catalyzed by LaNi 0.8 Fe 0.2 O 3 for H 2 production were further optimized.