A comparative study of electrodes in the direct synthesis of CH4 from CO2 and H2O in molten salts

A comparative study of electrodes in the direct synthesis of CH4 from CO2 and H2O in molten salts
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熔盐中CO2和H2O直接合成CH4电极对比研究

DOI:
10.1016/j.ijhydene.2017.04.152
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发表时间:
2017-07
影响因子:
7.2
通讯作者:
吴红军
吴红军
中科院分区:
工程技术2区
文献类型:
--
作者:
纪德强;刘悦;李志达;苑丹丹;杨关键;姜梦培;王宇航;于艳艳;吴红军

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自工业革命以来,对有限化石能源的严重依赖向空气中排放了大量二氧化碳,导致全球严重变暖。在本文中,我们提出了一种新的绿色技术来减缓温室气体二氧化碳排放并将其转化为低碳可再生能源。通过这种方式,电能转化为化学能。 CO2和H2O在600℃的碱金属碳酸盐中,以nH:nC=0.15:1的摩尔比,以30cm2镍阳极和30cm2铁阴极在0.25A恒定电流下直接同时电解,实现电能储存为化学能。该电解提供了包含 45.9% 甲烷、53.1% H2、0.92% CO 和痕量长链(比甲烷)烃的气态产物。同时,60 分钟内电流效率仍约为 51%。
Since the Industrial Revolution, the heavy reliance on the limited fossil energy has emitted huge number of CO2into the air and led to a severely global warming. We propose a new green technology to moderate greenhouse gas CO2emission and transform it into low-carbon renewable energy in this paper. Through this manner, electricity is transformed into chemical energy. CO2and H2O is directly simultaneous electrolysis under constant 0.25 A with 30 cm2nickel anode and 30 cm2iron cathode in a 600 °C alkali carbonate with LiOH electrolyte in mole ratio of nH:nC= 0.15:1, achieving the storage of electricity to chemical energy. This electrolysis provides a gaseous product comprising 45.9% methane, 53.1% H2, 0.92% CO and trace amounts of longer (than methane) hydrocarbons. Simultaneously, the current efficiency is still ∼51% for 60 min.
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