The chemical looping gasification (CLG) process is a promising pathway to produce hydrogen-enriched syngas with biomass. It is urgent to enhance the reactivity and thermal stability of oxygen carriers (OC) and capture the inherently separated CO 2 . This work presents the strategy of simultaneous modification of a Fe 2 O 3 /Al 2 O 3 oxygen carrier and the supplement of an oxidant for corn stalk chemical looping gasification by introducing KNO 3 -containing ethanol liquid waste. CaO is employed to capture the generated CO 2 and promote the reaction balance toward hydrogen production in a fuel reactor (FR). The highest carbon conversion reaction rate of 1.1 × 10 –4 mol/g could be obtained at the ratio of CaO to fuel carbon and the reaction temperature of 1.5 and 600 °C, respectively. The kinetics and thermodynamics analyses under the optimized condition are further discussed to verify the possibility and high efficiency of using alkaline organic liquid waste to boost solid fuel gasification for hydrogen production. This CLG strategy shows multifunctional merits, including organic liquid waste treatment, biomass CLG promotion, and hydrogen production enhancement.

Summary Chemical looping combustion (CLC) between Fe2O3 and NH3 can lead to the generation of H2O, H2, NO, and N2 as the main product under different reaction stages, reasonable control of which can realize effective conversion and utilization of NH3. To initiate the CLC reaction, NH3 is chemically adsorbed on the perfect Fe2O3 surface with a hybrid between N and Fe, leading to the dehydrogenation of NH3 into *NH2 as the first reaction step. Then the second dehydrogenation step (*NH2→*NH) acts as the speed‐control step for the oxidation of NH3 into H2O and N2, leading to the reduction of Fe2O3. The reduction of Fe2O3 promotes the further adsorption of NH3, especially the intermediate species *NH2, *NH, and *N, which favors the generation of H2O and N2. Further reduction of Fe2O3 into the oxidation state lower than ~Fe2O2.25 shows lower surface oxygen potential, which is beneficial to the formation of H2 and N2. Results suggest that reasonable control of the oxidation state of iron oxide can optimize the NH3 CLC process for H2 production.

Preparation of activated carbon from biomass ash residue can effectively treat solid waste and improve the economics of the biomass power generation industry. However, the low thermal conductivity of activated carbon (AC) cannot make it widely used. A strategy was reported herein modify the activated carbon by AlN increase its thermal conductivity. Effects of reaction temperature, nitriding time, and nitrogen flow rate on the formation AlN and summarized the optimal process of AlN modified activated carbon. The result showed that the optimal preparation process is to inject nitrogen at a rate of 300 ml/min, under the condition of 1550°C, nitriding reaction for 50 min. The thermal conductivity of AlN-modified activated carbon prepared by this process is twice that of unmodified activated carbon.