Solar-driven H2O/CO2 conversion to fuels via two-step electro-thermochemical cycle in a solid oxide electrochemical cell
Solar-driven H2O/CO2 conversion to fuels via two-step electro-thermochemical cycle in a solid oxide electrochemical cell
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太阳能驱动的 H2O/CO2 通过固体氧化物电化学电池中的两步电热化学循环转化为燃料
DOI：
10.1016/j.enconman.2022.115578
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发表时间：
2022-05
影响因子：
10.4
通讯作者：
Lu Youjun
中科院分区：
文献类型：
--
作者：
Pan Heng;Li Yihang;Zhu Liya;Lu Youjun
摘要利用金属氧化物进行两步太阳能热化学循环分解H2O/CO2是一条很有前途的燃料生产途径。然而，目前两步热化学循环的还原温度仍然过高，燃料生产率较低，这严重阻碍了太阳能对燃料效率的提高。为了克服两步法热化学循环所面临的挑战，提出了一种与固体氧化物电解槽(SOEC)相结合的两步法电-热化学循环。同时，详细阐述了该循环的定义、分类和运行模式。建立了电助还原CO2裂解热化学循环的热力学模型，研究了电压(E)、还原温度(T Red)、氧分压(PO2)、固相和气相的热回收对太阳能转化为燃料效率的影响。当电场从0 V增加到0.6V时，效率从0.2 9增加到0.4 0，这是因为CeO2的T red可以从15 0 0℃降到10 0 0℃，p O2=10−6bar。此外，SOEC中的氧载流子甚至可以在空气中还原，而不是在低pO2气氛中，同时保持高效率。在这条创新的道路上，可以缓解高温红色的技术挑战和氧气载体对p O2的高敏感性。
Abstract H 2 O/CO 2 splitting via two-step solar thermochemical cycles performed with metal oxides is a promising path for fuel production. However, currently the reduction temperature of two-step thermochemical cycles is still too high and the fuel productivity is relatively low, which significantly hinders the improvement of solar-to-fuel efficiency. In this work, a two-step electro-thermochemical cycle integrated with a solid oxide electrolysis cell (SOEC) is proposed to overcome the challenges faced by two-step thermochemical cycle. Meanwhile, the definition, classification and operating mode of this cycle are expounded in detail. Additionally, a thermodynamic model of electro-assisted reduction thermochemical cycle (ERTC) for CO 2 splitting is established and applied to investigate the effect of voltage (E), reduction temperature (T red), oxygen pressure (p O 2), heat recovery of the solid and gas phases on solar-to-fuel efficiency. The efficiency increases from 0.29 to 0.40 as E increases from 0 V to 0.6 V due to the required T red of ceria could be reduced from 1500℃ to 1000℃, with p O 2= 10− 6 bar. Moreover, the oxygen carrier in SOEC could even be reduced in air instead of a low-p O 2 atmosphere while maintaining high efficiency. The technological challenges of high T red and the oxygen carriers’ high sensitivity to p O 2 can be mitigated in this innovative path.
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DOI：
10.3390/ma3114922
发表时间：
2010-11-12
期刊：
Materials (Basel, Switzerland)
影响因子：
--
作者：
Loutzenhiser PG;Meier A;Steinfeld A
通讯作者：
Steinfeld A
影响因子：
3.7
作者：
Christopher M. Perkins;A. Weimer
通讯作者：
Christopher M. Perkins;A. Weimer
使用对称纳米结构钙钛矿电极高效电解纯二氧化碳
影响因子：
5
作者：
Li Yihang;Zhan Zhongliang;Xia Changrong
通讯作者：
Xia Changrong
影响因子：
5.3
作者：
J. Scheffe;David Weibel;A. Steinfeld
通讯作者：
J. Scheffe;David Weibel;A. Steinfeld
影响因子：
32.5
作者：
J. Vieten;B. Bulfin;P. Huck;Matthew K. Horton;D. Gubán;Liya Zhu;Youjun Lu;K. Persson;M. Roeb;C. Sattler
通讯作者：
J. Vieten;B. Bulfin;P. Huck;Matthew K. Horton;D. Gubán;Liya Zhu;Youjun Lu;K. Persson;M. Roeb;C. Sattler