Chemical Looping Reforming (CLR) of cooking oil combining with Chemical Looping Hydrogen (CLH) for synthesis gas and high purity hydrogen production was performed with different hematite oxygen carriers. Results revealed the sample with higher content of Fe₂O₃ and ZnO displayed better reactivity. Zn²⁺ in hematite can promote the releasing of active lattice oxygen [O·] to improve carbon conversion efficiency and atomic selectivity based on metal synergistic effect. The highest carbon conversion efficiency 47.36% with H₂/CO ratio closed to 2 and syngas yield 1.19 L/g were achieved in CLR stage. Accordingly, the maximum H₂ concentration of 93.8% and yield of 444.3 ml/g were obtained in the subsequent CLH stage. It was revealed that the reduction of Fe species in oxygen carrier was a stepwise process in order of Fe³⁺→Fe²⁺→Fe⁰ in CLR reaction, whereas, the lattice oxygen O²⁻ diffused outward from bulk to surface of oxygen carrier, transforming to chemical adsorption oxygen O₂⁻ and O⁻ to participate reactions. The hematite oxygen carriers displayed irregularly blocky and porous structure. Meanwhile, sintering phenomena was not observed in the used samples. The BET surface area of oxygen carrier in four reaction stages increased from 1.727 to 2.703 m²/g.

使用不同的赤铁矿氧载体，将食用油的化学环重整（CLR）结合化学环氢（CLH）用于合成气和高纯度制氢。结果表明，Fe ₂ O ₃和ZnO含量较高的样品具有较好的反应活性。基于金属协同作用，赤铁矿中的Zn ²⁺可以促进活性晶格氧[O·]的释放，从而提高碳转化效率和原子选择性。在CLR阶段，H ₂ / CO比接近2，合成气收率达到1.19 L / g，碳转化效率最高，达到47.36％。因此，最大H ₂在随后的CLH阶段中获得了93.8％的浓度和444.3ml / g的收率。结果表明，CLR反应中氧载体中Fe种类的还原是Fe ³⁺ →Fe 2 ⁺ →Fe ⁰的逐步过程，而晶格氧O ²⁻从本体向氧载体的表面向外扩散。 ，转化到化学吸附氧O ₂ ^-和O ^-参加反应。赤铁矿氧载体显示出不规则的块状和多孔结构。同时，在所使用的样品中未观察到烧结现象。在四个反应阶段中，氧载体的BET表面积从1.727增加到2.703m ² / g。