[1]	BP, p.l.c.. Statistical review of world energy 2020. 69th ed. London: BP, p.l.c.; 2020.

[2]	International Energy Agency. CO2 emissions from fuel combustion, 2020 edition. Paris: International Energy Agency; 2020.

[3]	Chen JH. An empirical study on China’s energy supply-and-demand model considering carbon emission peak constraints in 2030. Engineering 2017;3 (4):512–7.

[4]	Xiao Y, Peng ZL, He JD, Liu ZM. Science and technology innovation promotes construction of new national energy system. Bull Chin Acad Sci 2019;34 (4):385–91. Chinese.

[5]	Chen DJ, Qi HN, Sun TT, Yan C, He YY, Kang CZ, et al. Polybenzimidazole membrane with dual proton transport channels for vanadium flow battery applications. J Membr Sci 2019;586:202–10.

[6]	Lu W, Li X, Zhang H. The next generation vanadium flow batteries with high power density—a perspective. Phys Chem Chem Phys 2018;20:23–35.

[7]	Zhou XZ, Xu YJ, Zhang XJ, Xu DH, Linghu YQ, Guo H, et al. Large scale underground seasonal thermal energy storage in China. J Energy Storage 2021;33:102026.

[8]	Bao XH. Nano confinement and catalytic conversion of energy molecules. Chin Sci Bull 2018;63(14):1266–74. Chinese.

[9]	Yang M, Fan D, Wei Y, Tian P, Liu Z. Recent progress in methanol-to-olefins (MTO) catalysts. Adv Mater 2019;31(50):1902181.

[10]	Wang J, Li G, Li Z, Tang C, Feng Z, An H, et al. A highly selective and stable ZnO– ZrO2 solid solution catalyst for CO2 hydrogenation to methanol. Sci Adv 2017;3 (10):e1701290.

[11]	Han YM. [‘‘Liquid sunshine” makes us closer to ‘‘carbon neutrality”]. China Science Daily 2020 Nov 11;Sect 3:1. Chinese.

[12]	Wang JQ, Dai ZM, Xu HJ. Research status and prospect of comprehensive utilization of nuclear energy. Bull Chin Acad Sci 2019;34(4):460–8. Chinese.

[13]	Zhu HX, Geng XY, Xiao Y, Cai R, Liu ZM. Strategic path for energy revolution in northwest China in the new era. Strateg Study Chin Acad Eng 2021;23 (1):92–100. Chinese.

[14]	Wang JN, Yan G. [Accelerate to peak the carbon emissions and promote highquality economic development]. Economic Daily 2021 Jan 4;Sect 1:3. Chinese.

[15]	Department of Energy Statistics, National Bureau of Statistics. China energy statistical yearbook 2020. Beijing: China Statistics Press; 2021.

[16]	Ye M, Zhu WL, Xu SL, Liu ZM. Coordinated development of coal chemical and petrochemical industries in China. Bull Chin Acad Sci 2019;34(4):417–25. Chinese.

[17]	China Global Television Network. President Xi’s speech at Climate Ambition Summit 2020 [Internet]. Beijing: China Daily; [updated 2020 Dec 13; cited 2021 Aug 15]. Available from: http://www.chinadaily.com.cn/a/202012/13/ WS5fd575a2a31024ad0ba9b7ac.html.

[18]	Project Report Preparation Team. Comprehensive report on China’s long-term low-carbon development strategy and transition path. China Popul Resour Environ 2020;30(11):1–25. Chinese.

[19]	Wu ZL, Wang H, Yang PZ, Ren XG. Commercialization progress of ethanol production from tail-gas of steel plants. China New Technol New Prod 2019;13:133–4. Chinese.

[20]	Griesser A, Buergler T. Use of HBI in blast furnace. Berg Huettenmaenn Monatsh 2019;164:267–73.

[21]	Jin GZ, Zhang X, Zhu HX, Li JJ, Zhang MZ, Xiao Y, et al. Research on multi-energy and innovation integration development of modern coal chemical industry to meet the challenge of carbon emission reduction. China Coal 2021;47 (3):15–20. Chinese.

[22]	The Publicity Department of the CPC Yulin Municipal Committee. Shaanxi Yulin: construct demonstration zone for energy revolution innovation. People’s Daily 2019 Dec 11;Sect 13. Chinese.