Hydrogen production and solar energy storage with thermo-electrochemically enhanced steam methane reforming

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外文摘要：Hydrogen is widely regarded as a sustainable energy carrier with tremendous potential for low-carbon energy transition.Solar photovoltaic-driven water electrolysis(PV-E)is a clean and sustainable approach of hydrogen production,but with major barriers of high hydrogen production costs and limited capacity.Steam methane reforming(SMR),the state-of-the-art means of hydrogen production,has yet to over-come key obstacles of high reaction temperature and CO2 emission for sustainability.This work proposes a solar thermo-electrochemical SMR approach,in which solar-driven mid/low-temperature SMR is com-bined with electrochemical H2 separation and in-situ CO2 capture.The feasibility of this method is veri-fied experimentally,achieving an average methane conversion of 96.8％at a dramatically reduced reforming temperature of 400-500 ℃.The underlying mechanisms of this method are revealed by an experimentally calibrated model,which is further employed to predict its performance for thermo-electrochemical hydrogen production.Simulation results show that a net solar-to-H2 efficiency of 26.25％could be obtained at 500 ℃,which is over 11 percentage points higher than that of PV-E;the first-law thermodynamic efficiency reaches up to 63.27％correspondingly.The enhanced efficiency also leads to decreased fuel consumption and lower CO2 emission of the proposed solar-driven SMR system.Such complementary conversion of solar PV electricity,solar thermal energy,and low-carbon fuel pro-vides a synergistic and efficient means of sustainable H2 production with potentially long-term solar energy storage on a vast scale.

外文关键词：

HydrogenSolar fuelThermo-electrochemical conversionDecarbonizationSolar energy storage

作者：

Ke Guo、Mingkai Liu、Bin Wang、Jiahui Lou、Yong Hao、Gang Pei、Hongguang Jin

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作者单位：

Department of Thermal Science and Energy Engineering,University of Science and Technology of China,Hefei 230026,China

Institute of Engineering Thermophysics,Chinese Academy of Sciences,Beijing 100190,China

University of Chinese Academy of Sciences,Beijing 100049,China

Wu Zhonghua College,North China Electric Power University,Beijing 102206,China

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基金：

Basic Science Center Program for Ordered Energy Conversion of the National Natural Science Foundation of ChinaJoint Research Center for Multienergy Complementation and Conversion between the University,of Science and Technology of Chi

项目编号：

51888103

出版年：

2024

DOI：

10.1016/j.scib.2024.01.028

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

年,卷(期)：2024.69(8)

参考文献量73