Syngas production: diverse H2/CO range by regulating carbonates electrolyte composition from CO2/H2O via co-electrolysis in eutectic molten salts

Syngas production: diverse H2/CO range by regulating carbonates electrolyte composition from CO2/H2O via co-electrolysis in eutectic molten salts
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合成气生产:通过在共晶熔盐中共电解调节 CO2/H2O 中的碳酸盐电解质成分,实现多种 H2/CO 系列

DOI:
10.1039/c7ra07320h
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发表时间:
2017-11
期刊:
影响因子:
3.9
通讯作者:
吴红军
吴红军
中科院分区:
化学3区
文献类型:
--
作者:
刘悦;苑丹丹;纪德强;李志达;张中海;王宝辉;吴红军

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我们提出了一种使用密封装置通过 CO2/H2O 共电解直接生产合成气 (H2 + CO) 的新型可持续方法,以解决环境二氧化碳 (CO2) 水平不断增加的问题。所有实验均使用双电极系统进行,该系统具有卷绕铁阴极和卷绕镍阳极,在二元和三元碳酸盐与氢氧化物的低共熔混合物中,氢氧化物/碳酸盐比率为0.1 : 1。在施加电压为 1.6-2.6 V 和工作温度为 500-600 °C 的情况下,通过 CO2 和 H2O 的可再生循环,H2/CO 产物比可以轻松地从 0.53 调整到 8.08。 Li0.85Na0.61K0.54CO3-0.1LiOH复合材料在测试中具有最高的电流效率,最佳值接近~93%。这项研究为将 CO2/H2O 电化学转化为可用于广泛工业应用的可控合成气原料提供了一种有前景的技术。
We present a novel sustainable method for the direct production of syngas (H2 + CO) from CO2/H2O co-electrolysis using a hermetic device, to address the continuously increasing level of environmental carbon dioxide (CO2). All experiments were conducted using a two-electrode system with a coiled Fe cathode and coiled Ni anode in eutectic mixtures of binary and ternary carbonates with hydroxide in a 0.1 : 1 hydroxide/carbonate ratio. With an applied voltage of 1.6–2.6 V and an operating temperature of 500–600 °C, the H2/CO product ratio was easily tuned from 0.53 to 8.08 through renewable cycling of CO2 and H2O. The Li0.85Na0.61K0.54CO3–0.1LiOH composite had the highest current efficiency among those tested, with an optimum value approaching ∼93%. This study provides a promising technique for the electrochemical conversion of CO2/H2O to a controllable syngas feedstock that can be used in a broad range of industrial applications.
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