铁基载氧体在化学链制氢中的应用研究

采用柠檬酸络合法和浸渍法制备铁基载氧体CeO2-Fe2O3/LaNiO3，并将其用于化学链制氢过程中。在剂烷比2:1、进水量0.1 mL、常压的实验条件下，考察反应温度对载氧体反应性能的影响。结果表明：氢气产量随Fe负载量的增加先增大后减小，最佳负载量为15%；助剂CeO2的添加，提高了载氧体的性能，使其经过100次循环后，仍保持一定的稳定性。并且5%CeO2-15%Fe2O3/LaNiO3载氧体在固定床反应器、还原温度为800 ℃、氧化温度为800 ℃、剂烷比为2:1、进水量为0.1 mL的实验条件下连续循环100次后仍保持高活性。

STUDY ON APPLICATION OF Fe-BASED OXYGEN CARRIER IN CHEMICAL LOOPING HYDROGEN GENERATION

CeO2-Fe2O3/LaNiO3 was prepared by citric acid complexation method and immersion method, and was used as the oxygen carrier in chemical looping hydrogen generation. The experiment was conducted under the conditions: ratio of Fe2O3 to CH4 of 2:1, water 0.1 mL, and atmospheric pressure to investigate the effect of reaction temperature. The results show that H2 output increases first and then decreases with increasing Fe loading. The optimum loading of Fe is 15%; Addition of CeO2 improves the stability of the oxygen carrier. Under the condition of atmospheric pressure, ratio of Fe2O3 to CH4 of 2,0.1 mL of water, reduction and oxidation reaction temperature of 800 ℃, the 5%CeO2-15%Fe2O3/LaNiO3 oxygen carrier can be repeatedly used for 100 times with high activity.