| 热化学碘硫循环中Bunsen反应 | |
| 白莹 ; 张平 ; 曲永水 ; BAI Ying ; ZHANG Ping ; QU Yong-Shui | |
| 2010-06-04 ; 2010-06-04 | |
| 关键词 | 碘硫循环 制氢 Bunsen反应 分离特性 I-S cycle,Bunsen reaction,separation characteristics O642 |
| 其他题名 | Bunsen Reaction in Thermochemcal Iodine-sulfur Cycle |
| 中文摘要 | 对碘硫循环中Bunsen反应生成的聚氢碘酸相和H2SO4相的分离特性进行了研究。研究了溶液温度和溶液中单质碘的加入量对体系分相的影响,考察了在不同的碘和水摩尔比下进行Bunsen反应后得到产物的分相特性。结果表明,过量碘的加入会引起溶液分相,分相需要的加碘量随温度升高而增加,在60℃时达到最大。碘和水的摩尔比对产物的分相特性有显著影响;在n(I2)∶n(H2O)<1∶8时,生成的产物不能分相;当n(I2)∶n(H2O)>1∶5时,产物冷却至室温下有碘析出。测定了在SO2连续通入过程中反应体系的酸度、I-离子、络合I-离子、SO42-等物种的变化情况,讨论了在各物种之间可能发生的反应。; Iodine-sulfur(I-S) cycle is one of the most promising thermochemical water-splitting processes for massive hydrogen production in the future with a high heat to hydrogen conversion efficiency.In this work,the separation characteristics of the two phases,sulfuric acid phase and polyhydriodic acid(HIx) phase,formed in Bunsen reaction of the cycle,were investigated.The effects of temperature of the solution and molar fraction of iodine in the mixture of H2SO4 and HIx on the separation characteristics were studied.The influence of the molar ratio of iodine to water in the Bunsen reaction on the phase separation and saturation of I2 was studied.Results show that the addition of excess iodine causes the formation of two insoluble liquid phases,the amount of excess iodine for the phase separation increases with the increasing of temperature and reaches the highest at 60 ℃.The separation characteristics are notably affected by molar ratio of iodine to water.If n(I2)∶n(H2O)<1∶8,the two acids can not be separated;if n(I2)∶n(H2O)>1∶5,iodine in the products may solidify at room temperature.In addition,the concentrations of H+,I-,SO2-4 and I-3 in the whole process of continuous SO2 addition were determined.Based on these results,possible reactions in Bunsen reaction were assumed and suitable reaction conditions were proposed.These results are beneficial to the selection of the operational parameters for Bunsen section of IS process.; 国防基础科研资助项目(A1420080145) |
| 语种 | 中文 ; 中文 |
| 内容类型 | 期刊论文 |
| 源URL | [http://hdl.handle.net/123456789/35683]  |
| 专题 | 清华大学 |
| 推荐引用方式 GB/T 7714 | 白莹,张平,曲永水,等. 热化学碘硫循环中Bunsen反应[J],2010, 2010. |
| APA | 白莹,张平,曲永水,BAI Ying,ZHANG Ping,&QU Yong-Shui.(2010).热化学碘硫循环中Bunsen反应.. |
| MLA | 白莹,et al."热化学碘硫循环中Bunsen反应".(2010). |
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