以碱式碳酸镍、碱式碳酸锌、碱式碳酸铜和水泥为原料制备水泥负载的Cu-Ni,Cu-Zn,Cu-Ni-Zn催化剂,考察了合成催化剂的甲醇裂解反应性能.结果表明:在常压、质量空速为3.39 h-1、温度为380～420℃的条件下,Cu-Ni/水泥催化剂作用下的甲醇转化率均在96％以上;Cu-Zn/水泥催化剂作用下的甲醇转化率较低,但对H2和CO选择性较高;采用Cu-Ni-Zn/水泥催化剂时,经1 600 h运转,甲醇转化率和产物分布变化不大,甲醇转化率基本维持在81％以上,(H2+CO)摩尔分数大于98％,说明Cu-Ni-Zn/水泥催化剂具有良好的高温稳定性.%Using the basic nickel carbonate,basic zinc carbonate,basic copper carbonate and cement as materials,the Cu-Ni,Cu-Zn and Cu-Ni-Zn cement catalysts were prepared,and their catalytic performance for methanol decomposition was studied.The evaluation results showed that the conversion of methanol over Cu-Ni catalyst exceeds 96％ at 380-420 ℃,WHSV of 3.39 h-1 and atmospheric pressure.The Cu-Zn catalyst shows lower catalytic activity,but higher selectivity for H2 and CO.After the Cu-Ni-Zn cement catalyst runs for 1 600 h,little changes are observed in the conversion of methanol and the distribution of product,the conversion of methanol is basically above 81％,and the total molar fraction of(H2 +CO)is more than 98％,indicating its good high temperature stability.
展开▼
