制备方法对甲醇水蒸气重整制氢CuO/CeO_2催化剂的影响

分别利用水热法、沉淀法和溶胶-凝胶法制备了CuO/CeO_2纳米催化材料,采用XRF,XRD,BET,H_2-TPR,XPS等方法对催化剂进行了表征,将催化剂应用于甲醇水蒸气重整制氢反应,探讨了不同制备方法对催化剂结构、性质和性能的影响。实验结果表明,水热法制备的CuO/CeO_2催化剂由于具有较大的比表面积,且活性组分CuO与载体CeO_2的作用较强,催化性能最好,在反应温度为300℃、水醇摩尔比为1.2、甲醇气态空速为800 h^-1时,甲醇转化率最高达93%。

Effect of preparation methods on performance of CuO/CeO_2 catalyst for hydrogen production from methanol steam reforming

CuO/CeO2 nano-catalytic materials were prepared by hydrothermal method,precipitation method and sol-gel method,respectively,and applied to methanol steam reforming for hydrogen production. The catalysts were characterized by XRF,XRD,BET,H2-TPR and XPS. Effects of preparation methods on structure,properties and performance of the catalyst were discussed. The results showed that the CuO/CeO2 catalyst prepared by the hydrothermal method presents the best catalytic performance due to its larger surface area and the strong interaction between active component CuO and carrier CeO2,and the methanol conversion can be up to 93% under the reacting temperature of 260 ℃, molar ratio of the water to methanol of 1.2,and the methanol GHSV of 800 h……-1.