Building and Verifying a Model for Mass Transfer and Reaction Kinetics of the Bunsen Reaction in the Iodine-Sulfur Process
Building and Verifying a Model for Mass Transfer and Reaction Kinetics of the Bunsen Reaction in the Iodine-Sulfur Process
复制标题
建立并验证碘-硫过程中本生反应的传质和反应动力学模型
DOI：
10.1021/acs.iecr.8b00930
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发表时间：
2018
影响因子：
4.2
通讯作者：
Zhang Ping
中科院分区：
文献类型：
--
作者：
Zhou Chenglin;Chen Songzhe;Wang Laijun;Zhang Ping
碘-硫(IS)工艺是最有前途的核制氢热化学水分离工艺之一。本森反应为两个分解反应产生硫酸和氢酸，在IS过程中起着至关重要的作用。本生反应的动力学数据和模型不足，给本生反应器的设计和工艺效率的优化与提高带来了困难。在双膜理论和热力学计算的基础上，首次分析和提出了本生反应这一复杂的气液两相浆态过程的传质机理和动力学机理，并根据不同的假设反应机理推导出本征反应速率方程模型。然后，对模型进行了进一步改进，并用实验动力学数据对模型进行了验证。最后，建立了一套反应速率方程，从而验证了该方程用于计算反应动力学数据的可靠性。所建立的传质模型和反应动力学模型为深入了解本生反应机理、选择反应器类型和设计本生反应器提供了重要信息。
The iodine–sulfur (IS) process is one of the most promising thermochemical water-splitting processes for nuclear hydrogen production. The Bunsen reaction, which produces sulfuric and hydriodic acids for two decomposition reactions, plays a crucial role in the IS process. Insufficient kinetics data and models of the Bunsen reaction have caused difficulties for designing a Bunsen reactor and optimizing and improving the efficiency of the process. The mass transfer and kinetics mechanism of the Bunsen reaction, which is a complicated gas–liquid slurry process, were first analyzed and proposed on the basis of double-film theory and thermodynamics calculation, and intrinsic reaction rate equation models were deduced with different hypothesized reaction mechanisms. Then, the models were further improved, and the experimental kinetics data were used to verify the models. Finally, a set of reaction rate equations was developed, thereby confirming its reliability for calculating the reaction kinetics data. The built models for mass transfer and reaction kinetics provide crucial information for the thorough understanding of the Bunsen reaction mechanism, selecting the reactor type, and designing the Bunsen reactor.