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Detailed kinetic modeling of homogeneous H2SO4 decomposition in the sulfur–iodine cycle for hydrogen production

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  • Zhang, Yanwei
  • Yang, Hui
  • Zhou, Junhu
  • Wang, Zhihua
  • Liu, Jianzhong
  • Cen, Kefa

Abstract

This study presents a detailed kinetic mechanism conducted by CHEMKIN for the homogeneous decomposition of SO3–H2O vapor in the sulfur–iodine cycle. The kinetic mechanism involving 27 reactions and 11 species was validated by experimental results. The effects of temperature, SO3/H2O ratio, residence time, and pressure on the decomposition rate of SO3 were studied by modeling. SO3 conversion rapidly increased with increasing temperature but only moderately increased with the addition of H2O in the kinetic process. The SO3 conversion ratio was slightly promoted with residence time at 1000K and 1100K. Meanwhile, SO3 conversion sharply increased with reaction time at 1300K to 1400K. The results of sensitivity analysis showed that elementary reactions (2) SO3=SO2+O, (3) SO3+O=SO2+O2, (12) 2HO2=H2O2+O2, and (13) HO2=H+O2 had important functions in SO3 decomposition. The reaction path of homogenous H2SO4 splitting was constructed based on detailed kinetic modeling and sensitivity analysis.

Suggested Citation

  • Zhang, Yanwei & Yang, Hui & Zhou, Junhu & Wang, Zhihua & Liu, Jianzhong & Cen, Kefa, 2014. "Detailed kinetic modeling of homogeneous H2SO4 decomposition in the sulfur–iodine cycle for hydrogen production," Applied Energy, Elsevier, vol. 130(C), pages 396-402.
    • Handle: RePEc:eee:appene:v:130:y:2014:i:c:p:396-402
    DOI: 10.1016/j.apenergy.2014.05.017
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    References listed on IDEAS

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    1. Grob, Gustav R., 2003. "Importance of ISO and IEC international energy standards and a new total approach to energy statistics and forecasting," Applied Energy, Elsevier, vol. 76(1-3), pages 39-54, September.
    2. Zhang, Yanwei & Zhu, Qiaoqiao & Lin, Xiangdong & Xu, Zemin & Liu, Jianbo & Wang, Zhihua & Zhou, Junhu & Cen, Kefa, 2013. "A novel thermochemical cycle for the dissociation of CO2 and H2O using sustainable energy sources," Applied Energy, Elsevier, vol. 108(C), pages 1-7.
    3. Li, Hongqiang & Tan, Geng & Zhang, Wenyu & Suppiah, Sam, 2012. "Development of direct resistive heating method for SO3 decomposition in the S–I cycle for hydrogen production," Applied Energy, Elsevier, vol. 93(C), pages 59-64.
    4. Li, Po-Jui & Hung, Tzu-Chen & Pei, Bau-Shei & Lin, Jaw-Ren & Chieng, Ching-Chang & Yu, Ge-Ping, 2012. "A thermodynamic analysis of high temperature gas-cooled reactors for optimal waste heat recovery and hydrogen production," Applied Energy, Elsevier, vol. 99(C), pages 183-191.
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    Cited by:

    1. Shin, Youngjoon & Lee, Taehoon & Lee, Kiyoung & Kim, Minhwan, 2016. "Modeling and simulation of HI and H2SO4 thermal decomposers for a 50NL/h sulfur-iodine hydrogen production test facility," Applied Energy, Elsevier, vol. 173(C), pages 460-469.
    2. Sun, Qi & Gao, Qunxiang & Zhang, Ping & Peng, Wei & Chen, Songzhe, 2020. "Modeling sulfuric acid decomposition in a bayonet heat exchanger in the iodine-sulfur cycle for hydrogen production," Applied Energy, Elsevier, vol. 277(C).
    3. Ghandehariun, S. & Wang, Z. & Naterer, G.F. & Rosen, M.A., 2015. "Experimental investigation of molten salt droplet quenching and solidification processes of heat recovery in thermochemical hydrogen production," Applied Energy, Elsevier, vol. 157(C), pages 267-275.
    4. Shin, Youngjoon & Lim, Jihong & Lee, Taehoon & Lee, Kiyoung & Jo, Changkeun & Kim, Minhwan, 2017. "Designs and CFD analyses of H2SO4 and HI thermal decomposers for a semi-pilot scale SI hydrogen production test facility," Applied Energy, Elsevier, vol. 204(C), pages 390-402.

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