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Stainless steel photoelectrochemical reaction device with both online and offline gas analysis functions

A chemical reaction and offline analysis technology, applied in the field of new stainless steel photoelectrochemical reaction devices, can solve the problems of fragile, expensive glass pipes, complicated stainless steel pipe connection process, etc., to improve accuracy and reliability, avoid solution heating and Thermal evaporation, avoiding the effect of solution heating and evaporation

Pending Publication Date: 2017-11-21
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glass pipes used for gas on-line analysis have disadvantages such as expensive, fragile, complex structure, difficult processing, poor scalability, complicated maintenance process, and difficult to ensure airtightness
In addition, the connection process between glass pipes and stainless steel pipes for gas chromatography is relatively complicated

Method used

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  • Stainless steel photoelectrochemical reaction device with both online and offline gas analysis functions
  • Stainless steel photoelectrochemical reaction device with both online and offline gas analysis functions
  • Stainless steel photoelectrochemical reaction device with both online and offline gas analysis functions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 1. A photoelectrochemical reaction device with both on-line and off-line gas analysis functions, mainly composed of a main reaction chamber, a gas circulation loop and a circulating water cooling system (see figure 1 shown). The gas flow direction in the reaction device is as follows: figure 1 indicated by the dotted arrow.

[0042] Specifically, the components of the device are as follows:

[0043] (1) Main reaction chamber: the main structure is a stainless steel 9-way chamber, 2 flanges are located on the upper and lower parts respectively, 6 flanges are located in the middle of the main reaction chamber and are distributed at 60 degrees, and 1 ferrule is welded in the middle of the chamber. An optical window is connected to the main reaction chamber through a flange on the upper part of the main reaction chamber. A photoelectrochemical electrolytic cell with a three-electrode system is sealed in the main reaction chamber. In the test, the light shines on the ph...

Embodiment 2

[0064] Embodiment 2 The effect of circulating water cooling device

[0065] During the photoelectrochemical reaction process, it is necessary to use a high-power light source to illuminate the photoelectrode. The temperature rise of the solution due to light will bring the following adverse effects:

[0066] 1) The temperature of the photoelectrochemical reaction changes with the light time;

[0067] 2) The solution evaporates rapidly due to heating up, so that the concentration of the solution changes significantly;

[0068] 3) Evaporated water condenses on the optical window, changing the intensity of the light.

[0069] By using a thermocouple, it is possible to measure the temperature of the solution in the electrolytic cell as a function of the exposure time. like figure 2 As shown, the temperature of the solution increased from 20 °C to 33.2 °C after 140 min of irradiation. At the same time, the solution in the electrolytic cell was reduced by about 2 ml (about 10%...

Embodiment 3

[0071] Embodiment 3 The relationship between the amount of calibration hydrogen and the hydrogen peak area measured by gas chromatography

[0072] 1. Experimental method

[0073] (1) Mix 20 ml of 0.1 mol / L Na 2 SO 4 The solution is poured into the electrolytic cell. Use a platinum wire with a diameter of 0.5 mm as the working electrode, a large-area platinum sheet as the counter electrode and an Ag / AgCl / Cl - as a reference electrode. After the three electrodes are connected to the electrode terminals, the electrolytic cell is sealed in the main reaction chamber.

[0074] (2) Rotate the switch of the six-way valve to connect the quantitative sampling loop to the main reaction chamber.

[0075] (3) Turn on the vacuum pump and fill it with argon to completely replace the gas inside the reactor. After the replacement is completed, turn off the vacuum pump and replace the gas.

[0076] (4) Turn on the micro air pump and keep it running during the reaction.

[0077] (5) Turn...

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Abstract

The invention discloses a photoelectrochemical reaction device with both online and offline gas analysis functions. A core structure of the device comprises a main reaction cavity, a gas circulating loop and a circulating water cooling system, which are all manufactured by stainless steel to achieve the advantages of high air tightness, temperature controllability, compact structure and high expansibility. The device can be compatible with the commodifaction gas chromatography, meanwhile, achieves online and offline analysis functions of gas components, and is hopeful to achieve wide application to such scientific researches as water photoelectrochemical pyrolysis and carbon dioxide reduction.

Description

technical field [0001] The invention belongs to the technical field of chemical reaction devices. More specifically, it relates to a new stainless steel photoelectrochemical reaction device with both online and offline gas analysis functions. Background technique [0002] With the rapid development of society, people's demand for energy is increasing. The reserves of non-renewable mineral energy such as oil and natural gas are limited, and with the continuous exploitation and consumption of human beings, they will be exhausted one day. In addition, the use of these fossil energy sources will produce a large amount of carbon dioxide gas, causing the greenhouse effect, and the emission of a large amount of harmful gases will cause serious environmental pollution. Therefore, the development of new clean and renewable energy is crucial and urgent for the sustainable development of human society. [0003] The sun is the main source of energy for the earth. The energy reaching...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/04C25B3/04C25B9/00C25B15/00G01N27/26G01N30/02C25B3/25
CPCG01N27/26G01N30/02C25B1/04C25B9/00C25B15/00C25B1/55C25B3/25Y02E60/36Y02P20/133
Inventor 马信洲张京涛楚盛
Owner SUN YAT SEN UNIV
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