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Nitrogen pentoxide standard gas providing device and method

A dinitrogen pentoxide and nitrogen dioxide technology, applied in the field of dinitrogen pentoxide standard gas supply devices, can solve the problems of unstable gas, difficulty in storing solids, unstable gas concentration, etc., and achieve a reliable adjustment method

Pending Publication Date: 2021-07-23
HANGZHOU PUYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

due to NO 3 with N 2 o 5 The gas is unstable and difficult to store. Currently, there is no commercial calibration instrument on the market for the calibration of nitric acid radicals and dinitrogen pentoxide.
While the N prepared in the laboratory 2 o 5 Solids are difficult to preserve (need to be preserved at -80°C), and the use of N 2 purge N 2 o 5 solid to produce N 2 o 5 Unstable gas concentration

Method used

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  • Nitrogen pentoxide standard gas providing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 A structural diagram of a providing apparatus of a nitrogen-free gas in accordance with an embodiment of the present invention is shown schematically, such as figure 1 As shown, the providing apparatus of the nitric oxide gas-stripped gas includes:

[0027] The reaction unit, the reaction gas reacts in the reaction unit to form a nitrogen, and the reaction gases comprise nitric oxide and ozone;

[0028] The detection unit is used to detect the concentration of ozone or nitrogen oxide in the mixed gas of the reactive unit;

[0029] The calculation unit is used to obtain a concentration of nitrous dioxide nitride. C t1 , C t2 It is the concentration of ozone or nitrogen ozone or nitric oxide at the reactive gas in the reaction unit T1 and T2 times. t2 , C t2 It is the concentration of the same gas;

[0030] The adjustment unit is configured to adjust the volume of the reaction unit or the flow rate of the reaction gas such that the residence time of the reaction ga...

Embodiment 2

[0049] Application examples of the providing apparatus and method of the nitrobium nitrogen reference gas according to Example 1 of the present invention.

[0050] In the application example, in the gas source, the first gas source is made of a steel bottle, providing a known concentration of nitric oxide; the second gas source uses an ozone production unit, such as the CN200910154006.3; the adjustment unit is used in the form of a piston to regulate the react The volume of the unit; the detecting unit is used to detect the concentration of nitrogen oxide in the mixed gas.

[0051] The method of providing a nitrous nitrogen barrier according to an embodiment of the present invention is:

[0052] The known concentration of nitric oxide and excess ozone provided by the gas source reacts in the reaction unit to form a nitric oxide;

[0053] The detection unit real time detects the concentration of nitrogen oxide in the mixed gas of the reaction unit;

[0054] The volume of the reaction...

Embodiment 3

[0060] According to an application example of the providing apparatus and method of the dioxide nitrogen gastrogent of the first embodiment of the present invention, it is different from that of Example 2:

[0061] 1. The detection unit detects the concentration of ozone;

[0062] 2. The adjustment unit regulates the flow rate of the reaction gas such that the residence time of the reaction gas is time T2: the larger flow, the shorter the residence time;

[0063] 3. The mixture of the discharge reaction unit is diluted, thereby reducing the concentration of nitrous oxide, and the dilution multiplication is determined according to the nitric oxide concentration of the reaction unit and the nitrous dioxide concentration required by the air.

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Abstract

The invention provides a nitrogen pentoxide standard gas providing device and method. The nitrogen pentoxide standard gas providing device is characterized in that a reaction gas reacts in a reaction unit to generate nitrogen pentoxide, and the reaction gas comprises nitric oxide and ozone; a detection unit is used for detecting the concentration of ozone or nitrogen dioxide in the mixed gas discharged from the reaction unit; a calculation unit is used for obtaining the concentrations Ct1 and Ct2 of nitrogen pentoxide, wherein the concentrations Ct1 and Ct2 are the concentrations of ozone or nitrogen dioxide when the reaction gas enters the reaction unit at t1 and t2 respectively, and the concentrations Ct2 and Ct2 are the concentrations of the same gas respectively; and an adjusting unit is used for adjusting the volume of the reaction unit or the flow of the reaction gas so that the retention time of the reaction gas in the reaction unit is t2. The device has the advantages of automation, good stability and the like.

Description

Technical field [0001] The present invention relates to a provisioning apparatus and method, particularly to a nitrous nitrogen reference gas. Background technique [0002] Nitrate radicals (NO 3 ) Is an important atmospheric atmospheric oxidant. Nitrite and nitrogen dioxide (N) 2 O 5 ) The production of nitrate particulates in Night nitrate and the activation of chlorine free radicals. The study of nitrobitrous and nitric oxide and its environmental concentration has become a research hotspot in the field of atmospheric chemistry in recent years. Due to NO 3 N 2 O 5 Gas is not stable, it is difficult to save, and there is no commercially based curler in the market for calibration of nitric radicals and nitrogen nitrogen. And N in the laboratory 2 O 5 The solid is difficult to save (stored by -80 ° C) and use N 2 Purge N 2 O 5 Solid n 2 O 5 The gas concentration is unstable. Inventive content [0003] In order to solve the deficiencies in the above prior art, the present inventi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 汪维昊刘永林刘盈智韩双来刘立鹏黄俊兴胡琼璞
Owner HANGZHOU PUYU TECH DEV CO LTD
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