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Evaluation method for condensation effect of hydrogen iodide in iodine-containing hydriodic acid by using electrolysis-electrodialysis device

An evaluation method, electrodialysis technology, applied in the field of electrochemistry, can solve problems such as heavy workload and complicated operation

Active Publication Date: 2014-07-02
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Relevant researchers (Journal of Membrane Science, Vol.346, 2010, 136-142) further proposed a theoretical calculation method to derive t + and beta w value, but the premise of its calculation is assuming that in the EED process t + and beta w are constant, and need a series of data points for drawing, and then deduce t by curve extension + and beta w Numerical values, the operation is more complicated, and the workload is relatively large

Method used

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  • Evaluation method for condensation effect of hydrogen iodide in iodine-containing hydriodic acid by using electrolysis-electrodialysis device
  • Evaluation method for condensation effect of hydrogen iodide in iodine-containing hydriodic acid by using electrolysis-electrodialysis device
  • Evaluation method for condensation effect of hydrogen iodide in iodine-containing hydriodic acid by using electrolysis-electrodialysis device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Embodiment 1: the effective membrane area of ​​proton selective permeable membrane is 25cm 2 The 2-piece electrolysis-electrodialysis device (including 1 electrolysis-electrodialysis unit, that is, only includes one cathode area and one anode area) is used for performance evaluation, in which, the volume V of the cathode area and the auxiliary pipeline of the cathode area c is 40ml, the volume V of the anode area and the auxiliary pipeline in the anode area a Be 50ml, take by weighing the iodine-containing hydroiodic acid feed liquid that determines each component concentration to form by titration and material balance, in this hydroiodic acid feed liquid, HI, I 2 、H 2 The molar ratio of O is 1:1.42:5.50, and 530.55g and 538.03g of the hydroiodic acid feed liquid are respectively used as the initial feed liquid of the cathode and anode bipolar regions. At 60°C, the current intensity I=3.75A (that is, the current density is 0.15 A / cm 2 ) conditions, keep the feed liqu...

Embodiment 2

[0076] Embodiment 2: To 5 stacked electrolysis-electrodialysis devices (containing 4 electrolysis-electrodialysis units, the effective membrane area of ​​each unit is 25cm 2 ) for performance evaluation, wherein, the volume V of the cathode area and the auxiliary pipeline of the cathode area c is 60ml, the volume V of the anode area and the auxiliary pipeline in the anode area a Be 75ml, take by weighing the iodine-containing hydroiodic acid feed liquid that determines each component concentration to form by titration and material balance, this hydroiodic acid feed liquid HI, I 2 、H 2 The molar ratio of O is 1:1.80:5.50, and 523.82g and 543.45g of this hydriodic acid feed solution are respectively used as the initial feed solution of the cathode and anode bipolar regions. A / cm 2 ) conditions, keep the feed liquid in the cathode and anode regions circulating in the cathode and anode pools, corresponding storage tanks, and auxiliary pipelines respectively, and the electrolysi...

Embodiment 3

[0081] Embodiment 3: to 11 stacked electrolysis-electrodialysis devices (containing 10 electrolysis-electrodialysis units, the effective membrane area of ​​each unit is 100cm 2 ) for performance evaluation, wherein, the volume V of the cathode area and the auxiliary pipeline of the cathode area c is 270ml, the volume V of the anode area and the auxiliary pipeline in the anode area a Be 297ml, take by weighing the iodine hydroiodic acid feed solution that determines each component concentration to form by titration and material balance, with 5003.3g HI, I 2 、H 2 O mol ratio is the hydroiodic acid feed liquid of 1:2.60:5.20 and 5018.1gHI, I 2 、H 2 The hydriodic acid feed solution with O molar ratio of 1:2.60:5.20 is used as the initial feed solution of the cathode and anode bipolar regions respectively. At 100°C, the current intensity I=15A (that is, the current density is 0.15A / cm 2 ) conditions, keep the feed liquid in the cathode and anode regions circulated in the cathod...

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Abstract

The invention discloses an evaluation method for concentration effect of hydrogen iodide in iodine-containing hydriodic acid by using an electrolysis-electrodialysis device, which belongs to the technical field of electrochemistry. According to the evaluation method, an electrolysis-electrodialysis cell treated by the electrolysis-electrodialysis device is repeatedly washed by using washing liquid containing iodine ions and deionized water, then the difference of the masses of the washing liquid containing iodine ions and the deionized water before and after washing is calculated, and the mass of residual liquid in the electrolysis-electrodialysis cell is calculated through balance according to the law of conservation of mass; therefore, evaluation errors caused by the residual liquid in the electrolysis-electrodialysis cell are reduced, the electrolysis-electrodialysis cell does not need to be dismounted, the whole process is simple and quick, and the method has strong operability and a high practical value.

Description

technical field [0001] The invention relates to the field of electrochemical technology, in particular to a method for evaluating the concentration effect of hydrogen iodide in iodine-containing hydroiodic acid by an electrolysis-electrodialysis device. Background technique [0002] Electrolysis-electrodialysis (Electrolysis and electrodialysis device, referred to as "EED") is a high-efficiency electrochemical concentration method, also known as ion-exchange membrane electrolysis or membrane electrolysis, and can also be used for the electrochemical synthesis of specific chemicals. [0003] Electrolysis-electrodialysis has been applied in thermochemical iodine-sulfur cycle (IS cycle) water splitting hydrogen production process. The IS cycle is an efficient and clean method for large-scale hydrogen production. What is particularly attractive is that this method is expected to be coupled with nuclear energy heating (such as heating by high-temperature gas-cooled reactors). Hy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/02
Inventor 陈崧哲王仁玲张平王来军徐景明
Owner TSINGHUA UNIV
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