Development of a novel flowsheet for sulfur–iodine cycle based on the electrochemical Bunsen reaction for hydrogen production
Development of a novel flowsheet for sulfur–iodine cycle based on the electrochemical Bunsen reaction for hydrogen production
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基于电化学本生反应制氢开发新型硫碘循环流程
DOI：
10.1016/j.ijhydene.2017.09.035
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发表时间：
2017-10
影响因子：
7.2
通讯作者：
Guomin Cui
中科院分区：
文献类型：
--
作者：
Zhi Ying;Xiaoyuan Zheng;Yao zhang;Guomin Cui
硫碘循环是一种很有前途的大规模制氢方法。本文设计并模拟了电化学本生反应组装硅循环的新流程。采用电化学本生反应，简化了工艺流程。高浓度的h2so4和HI，特别是超共沸HI溶液，在电化学电池的分离室中成功生成，无需进一步分离纯化。富集后的HI气体通过闪蒸蒸发，省去了额外的浓缩过程，然后分解成1 mol/s的H2in氢透选膜反应器。采用HI分离器最大限度地回收未分解的HI。闪蒸后浓缩的h2so4分解为0.5 mol/s的O2。评估了SI循环的质量和能量平衡。能量的梯级利用是通过流程内冷热流之间的内部热交换来实现的。余热作为电能回收利用，提高了能源利用效率。该流程的总热效率估计为42-50%，并且对热回收率敏感。简化后的工艺流程与传统工艺流程相比具有一定的竞争力，可为SI循环的工业利用提供参考。
The sulfur–iodine (SI) cycle is one of the promising methods for large-scale hydrogen production. A new flowsheet of SI cycle assembled with electrochemical Bunsen reaction was devised and modeled in this work. Adoption of electrochemical Bunsen reaction simplifies the flowsheet. The high concentrations of H2SO4and HI, especially the over-azeotropic HI solution, successfully generated in the separated compartments of electrochemical cell without requiring further separation and purification. The enriched HI gas evaporates through flash, eliminating the extra concentration process, and then decomposes into 1 mol/s of H2in hydrogen perm-selective membrane reactor. A HI separator is employed to maximize the recycle of undecomposed HI. The concentrated H2SO4after flash decomposes into 0.5 mol/s of O2. The mass and energy balances of the SI cycle were evaluated. The cascade utilization of energy was carried out through internal heat exchange between hot and cold streams in the flowsheet. The surplus waste heat was recovered as electric power to improve the energy utilization efficiency. The overall thermal efficiency of the flowsheet was estimated to be 42–50% and was sensitive to heat recovery ratio. The simplified and energy-efficient flowsheet is competitive to the previous traditional flowsheets and will provide a reference for the industrial utilization of SI cycle.
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影响因子：
15.9
作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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