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Modeling and simulation of HI and H2SO4 thermal decomposers for a 50 NL/h sulfur-iodine hydrogen production test facility

机译:用于50 NL / h硫碘制氢测试设备的HI和H2SO4热分解器的建模和仿真

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A 50 NL-H-2/h hydrogen production scale sulfur-iodine (SI) thermochemical process test facility to be operated under a pressurized environment has been constructed in Korea. This study focused on the catalyst-packed type HI thermal decomposer and bayonet type H2SO4 thermal decomposer, which are the key components for the 50 NL-H-2/h SI test facility. To sustain a closed loop operation of the SI process, the catalyst particles packed in the top of the H2SO4 thermal decomposer are protected from coming into contact with the inlet sulfuric acid aqueous solution, and the production molar ratio of oxygen discharged from the H2SO4 thermal decomposer to hydrogen discharged from the HI thermal decomposer always satisfies 0.5/1. Based on the design specifications and mass balance of the SI integrated process of 50 NL-H-2/h, numerical calculations for the two decomposers were done to evaluate their start-up and static behaviors. Based on the results of these calculations, it is predicted that the boiling interface of the sulfuric acid solution is located around 280 mm from the bottom of the electric furnace to heat the bayonet type H2SO4 thermal decomposer, which is far from the catalyst-packed region. It is also proposed that the proper operating temperature of the HI thermal decomposer to satisfy the hydrogen production rate of 50 NL-H-2/h and sustain the closed loop operation of the SI process is 587 degrees C. (C) 2016 Elsevier Ltd. All rights reserved.
机译:韩国已建造了50台NL-H-2 / h制氢规模的硫碘(SI)热化学过程测试设备,该设备将在加压环境下运行。这项研究的重点是装有催化剂的HI型热分解器和刺刀型H2SO4热分解器,它们是50 NL-H-2 / h SI测试设备的关键组件。为了维持SI工艺的闭环操作,应保护填充在H2SO4热分解器顶部的催化剂颗粒不与入口硫酸水溶液接触,并保护从H2SO4热分解器排出的氧气的生产摩尔比。从HI热分解器排出的氢的总含量始终满足0.5 / 1。根据50 NL-H-2 / h的SI集成工艺的设计规格和质量平衡,对两个分解器进行了数值计算,以评估它们的启动和静态行为。根据这些计算的结果,可以预测硫酸溶液的沸腾界面距离电炉底部约280 mm,以加热刺刀型H2SO4热分解器,该分解器远离催化剂填充区域。还建议HI热分解器的合适运行温度为587摄氏度,以满足50 NL-H-2 / h的制氢量并维持SI工艺的闭环运行。(C)2016 Elsevier Ltd 。 版权所有。

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