Three cascade processes for the simultaneous production of hydrogen and carbon nanotubes (CNTs) were designed about the catalytic decomposition of methane (CDM), overcoming the conflicting requirements of carbon generation, transfer, and deposition rate for the generation of hydrogen and CNTs. NiFeAl and FeMg, were selected as catalysts for the generation of hydrogen and CNTs, respectively. In individual testing, the hydrogen yield of CDM with NiFeAl reached 55%. However, with FeMg, the CNTs yield reached 0.95 g/g_cat when the co-fed hydrogen ratio, V_CH4:V_H2, was 10:20. The multiple connection mode, including one NiFeAl stage and two FeMg stages, was the most promising system for the production of pure hydrogen with 86% yield and high-quality CNTs with 2.63 g/g_cat output. This cascade CDM process is applicable and promising for large-scale industrial hydrogen and CNTs production through utilizing existing catalysts of CDM further.

针对甲烷的催化分解（CDM），设计了三种同时生产氢和碳纳米管（CNT）的级联工艺，克服了碳和氢，碳纳米管的生成，转移和沉积速率的矛盾要求。选择NiFeAl和FeMg作为分别用于产生氢和CNT的催化剂。在单独的测试中，使用NiFeAl的CDM的氢气产率达到了55％。但是，当使用FeMg时，当共同进料氢比V _CH4：V _H2时，CNT的产量达到0.95 g / g _cat，是10:20。包括一个NiFeAl阶段和两个FeMg阶段的多重连接模式是生产86％收率的纯氢和以2.63 g / g_猫的产量生产高质量CNT的最有希望的系统。通过进一步利用CDM的现有催化剂，该级联CDM工艺适用于并有望用于大规模工业制氢和CNTs生产。