分别通过浸渍法和共沉淀法制备了不同Ni负载量的Ni/Al2O3催化剂.考察了Ni负载量、制备方法以及反应温度对Ni/Al2O3催化甲烷裂解性能的影响.结果表明,在550℃,浸渍法制备的Ni/Al2O3催化剂,当Ni负载量为20％(质量分数)、Ni金属平均粒径为11.25 nm时,具有最佳的甲烷催化裂解效果,其每摩尔Ni 的氢气产量和每克Ni碳产量分别为164 mol和15.30 g.链化剂制备方法对Ni/Al2O3甲烷催化裂解反应有显著影响,相同Ni负载量共沉淀法制备的Ni/Al2O3甲烷催化裂解总体效果要好于浸渍法制备的Ni/Al2O3,而且反应过程中生成的碳纤维较长,管径也较均一.550℃时,共沉淀法制备的Ni负载量为41.2％(质量分数)的Ni/Al2O3催化剂在反应至350 min时,仍保持着30％以上的转化率.
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