School of Energy,Power and Mechanical Engineering,North China Electric Power University
Institute of EngineeringThermophysics,Chinese Academy of Sciences
Guangdong Provincial Key Laboratory of Distributed Energy Systems,School of Chemical Engineering and Energy Technology,Dongguan University of Technology

为了实现氢能的安全储存与运输,将氢气转化为液态甲醇成为氢气存储的重要方式。氢气与一氧化碳(CO)通过费托合成制取甲醇由于其优异性能而被广泛应用。传统制取氢气与CO的方法主要是甲烷湿重整和甲烷干重整,然而该方法需在高温(≥850℃)下进行,且能量消耗较大,通常依赖甲烷燃烧放热以满足反应条件。提出了一种太阳能驱动甲烷化学链重整制氢与甲醇合成的储能系统,选用氧化镍作为载氧体,反应温度可降至600℃,系统以太阳热能为驱动力,避免了燃烧甲烷,降低了能耗并减少了环境负担。同时,依据“温度对口、梯级利用”原则将甲烷化学链重整产生的高温烟气与燃气蒸汽联合循环耦合进行发电。能量、㶲和灵敏度分析结果表明:燃料反应器与空气反应器温度分别为600℃和1200℃、氧化镍与甲烷物质的量比为0.8、水与甲烷物质的量比为1.9时,系统的能量利用效率为62.82%,㶲效率为64.75%,甲醇产率可达69.73%。在此条件下,甲烷转化率为80.58%,相比传统甲烷重整法降低了250℃,且甲烷转化率显著提高。

To achieve safe storage and transportation of hydrogen energy,converting hydrogen gas into liquid methanol has become animportant method for hydrogen storage. Hydrogen and carbon monoxide (CO) are used to produce methanol via the Fischer-Tropschsynthesis,which is widely applied due to its excellent performance. Traditional methods of producing hydrogen and CO mainly involvemethane steam reforming and dry reforming of methane. However,these methods require high temperatures (≥850 ℃) and have highenergy consumption,often relying on the combustion of methane to provide heat for the reaction. This paper proposes a solar-drivenchemical looping reforming system for hydrogen production and methanol synthesis, using nickel oxide as the oxygen carrier. Thereaction temperature can be reduced to 600 ℃, and the system is powered by solar thermal energy, avoiding methane combustion,reducing energy consumption,and lowering environmental impact. Additionally,following the principle of “temperature matching andcascading utilization”, the high-temperature flue gas and gas steam generated by methane chemical looping reforming are coupled in acombined cycle for power generation. Energy,efficiency,and sensitivity analysis results show that when the fuel reactor and air reactortemperatures are 600 °C and 1 200 °C,respectively,the molar ratio of nickel oxide to methane is 0.8,and the molar ratio of water to methane is 1.9,the system achieves an energy utilization efficiency of 62.82%,an efficiency of 64.75%,and a methanol yield of 69.73%.Under these conditions,the methane conversion rate is 80.58%,which is 250 ℃ lower than traditional methane reforming methods,whilesignificantly improving the methane conversion rate.

国家自然科学基金青年基金资助项目(52306242);国家自然科学基金面上基金资助项目(52076075)

王艳娟,龙云飞,辛宇,等.太阳能驱动甲烷化学链重整制氢与甲醇合成的储能系统模拟[J].洁净煤技术,2024,30(12):95−104.

WANG Yanjuan,LONG Yunfei,XIN Yu,et al. Simulation analysis of an energy storage system for solar-driven chemical looping reforming of methane to produce hydrogen and methanol[J].Clean Coal Technology,2024,30(12):95−104.