Pyrolysis of methane is a carbon-economic method to obtain valuable carbon materials and CO_x-free H₂, under the carbon peaking and carbon neutrality goals. In this work, we propose a methane pyrolysis process to produce graphite and H₂ using bubble column reactor containing NiO/Al₂O₃ and NaCl–KCl (molten salt). The process was optimized by the different amounts of NaCl–KCl, the CH₄/Ar ratio and temperature, indicating that the CH₄ conversation rate could reach 92% at 900 °C. Meanwhile, we found that the addition of molten salt could obtain pure carbon materials, even if the conversation rate of CH₄ decreases. The analysis of the carbon products revealed that graphite could be obtained.

甲烷热解是在碳峰值和碳中和目标下获得有价值的碳材料和不含CO _x的H _{2的碳经济方法。在这项工作中，我们提出了一种利用含有NiO/Al 2} O ₃和NaCl-KCl（熔盐）的泡罩塔反应器生产石墨和H _{2的甲烷热解工艺。}通过不同的NaCl-KCl用量、CH ₄ /Ar比和温度对工艺进行了优化，表明CH ₄转化率在900 ℃时可以达到92%。_{同时我们发现，即使CH 4}转化率降低，熔盐的添加也可以获得纯碳材料。对碳产物的分析表明可以获得石墨。