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Method and device for directly synthesizing hydrogen peroxide at room temperature

A hydrogen peroxide, direct technology, applied in chemical instruments and methods, peroxide/peroxy hydrate/peroxyacid/superoxide/ozonide, inorganic chemistry, etc., can solve the problem of no new reports, Unfavorable practical application and other problems, to achieve the effect of improving the uniformity of discharge and solving the problem of heat removal

Inactive Publication Date: 2009-02-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This is obviously not conducive to practical application
[0005] In terms of plasma synthesis of hydrogen peroxide, no new reports have been seen since the 1960s

Method used

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  • Method and device for directly synthesizing hydrogen peroxide at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1 (comparative example)

[0025] Hydrogen and oxygen are regulated by a flow meter and a regulating valve, and then mixed in the pipeline at a flow rate of 100 ml / min and 2 ml / min respectively, and then enter a common wire barrel type dielectric barrier discharge plasma generator. The housing of the device is made of silicate oxide hard glass with a wall thickness of 1.5 mm, an inner diameter of 9 mm and a length of the discharge area of ​​220 mm. The device uses a metal copper wire with a smooth surface as the discharge electrode, and its diameter is 0.56 mm. The grounding electrode of the device is a metallic copper mesh tightly wrapped around the exterior of the glass case. The device works in an atmospheric environment. The gas mixture passing through the discharge of the device was sparged in a collector filled with 10 ml of water (adjusted to pH 5 with phosphoric acid) and then evacuated. After ventilating for 5 minutes, turn on the high-voltage AC p...

Embodiment 2

[0031] Example 1 was repeated, but using the self-cooling dielectric barrier discharge plasma generator of the present invention. The shell of the device is made of silicate oxide hard glass, the wall thickness of the inner cylinder is 1.5 mm, the inner diameter is 9 mm, and the length of the discharge area is 220 mm. The annulus distance between the inner and outer cylinders is 10mm, and the annulus length is the same as the discharge area. The device uses a metal copper wire with a smooth surface as the discharge electrode, and its diameter is 0.56 mm. Ordinary pipe tap water with a conductivity of 0.078 millisiemens / cm is passed into the annulus of the inner and outer cylinders of the device as cooling circulating water / ground electrode. within 1°C. The current lead-out wire of the device is a metal tungsten wire with a diameter of 1.0 mm. The device is also discharged at 10.8KV, and the results obtained under different discharge times are:

[0032] Discharge for 10 min...

Embodiment 3

[0037] Repeat Example 2, but the housing of the device is made of silicate oxide quartz glass, the discharge electrode is 18Ni9Ti stainless steel alloy, and the conductivity is 9.23 millisiemens / centimeter containing sodium chloride 2% in the inner and outer cylinder annulus. (Quality) aqueous solution is used as cooling circulating water / ground electrode, and the current lead-out line is metal platinum wire. The discharge voltage of the device is 10KV. The results obtained under different discharge times are:

[0038] Discharge for 10 minutes, the temperature of the inner wall of the device is 15°C, and the concentration of hydrogen peroxide in the collected liquid is 5.8 mmol / L;

[0039] Discharge for 30 minutes, the temperature of the inner wall of the device is 15°C, and the concentration of hydrogen peroxide in the collected liquid is 22.5 mmol / L;

[0040] Discharge for 60 minutes, the temperature of the inner wall of the device is 15°C, and the concentration of hydrogen ...

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Abstract

The invention relates to a self-cooled plasma generating apparatus by using dielectric barrier discharge, and a method for converting mixed gas of oxygen and hydrogen into hydrogen dioxide in gas phase at room temperature by using the apparatus, wherein the apparatus includes a coaxial sleeve configuration made of glass, the inner wall of the cartridge is a discharge medium, at the center of which a metallic discharged electrode is arranged, the mixed gas containing oxygen hydrogen flows downwards, wherein the annular space of the glass sleeve is filled with circulating water, which serves as an earth electrode.

Description

technical field [0001] The invention belongs to the technical field of plasma synthesis chemicals, and relates to a self-cooling plasma generating device belonging to a dielectric barrier discharge and using the device to directly synthesize hydrogen peroxide from a mixed gas containing hydrogen and oxygen in a gas phase at room temperature method. Background technique [0002] Known as "green oxidant" and "the cleanest chemical product", hydrogen peroxide is widely used in chemical synthesis, textile bleaching, pulp, paper bleaching, waste paper deinking, electronics, medicine and health, and military industry. [0003] At present, the industrial method of producing hydrogen peroxide is mainly the anthraquinone method, and the annual output in the world has reached millions of tons. Although the technology of the anthraquinone method is mature, due to the use of precious metal palladium as an anthraquinone hydrogenation catalyst, and the recycling of anthraquinone and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B15/029
Inventor 郭洪臣周军成王祥生郭明星赵剑利宫为民
Owner DALIAN UNIV OF TECH
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