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Bipolar three-dimensional electrode catalyst packing and preparation method thereof

A three-dimensional electrode and catalyst technology, which is applied in the field of bipolar three-dimensional electrode catalyst filler and its preparation, can solve the problems of short-circuit current, loss of active components, reduction of current efficiency, etc., achieve long continuous service life, improve mechanical strength, improve The effect of biodegradability

Inactive Publication Date: 2014-03-12
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The two-dimensional reaction system is the traditional flat electrode system, which has low mass transfer efficiency and small specific surface area, resulting in a decrease in current efficiency, and it is difficult to promote practical applications.
At present, activated carbon, modified activated carbon, supported γ-Al 2 o 3 , supported molecular sieves, and supported ceramic particles are used as three-dimensional electrode catalyst fillers, but these fillers have the following defects: the activated carbon has a small impedance, and it is easy to form a short-circuit current when it is filled between the plates, reducing the current efficiency, and the activated carbon particles will also appear pulverized. Phenomenon; modified activated carbon is generally dominated by coating and loaded metal oxides, but after such treatment, the specific surface area of ​​particles is greatly reduced, and the active components are easy to lose, which reduces the catalytic activity; supported γ-Al 2 o 3 And supported molecular sieves have large pores and specific surface areas, but it is also difficult to solve the problem of active component loss; the surface of supported ceramic particles is covered by organic pollutants and denuded, resulting in the loss of active components that seriously affects the catalytic performance of three-dimensional electrode catalyst fillers. Activity and service life

Method used

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  • Bipolar three-dimensional electrode catalyst packing and preparation method thereof
  • Bipolar three-dimensional electrode catalyst packing and preparation method thereof

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Effect test

Embodiment 1

[0027] The bipolar three-dimensional electrode catalyst filler of this embodiment includes pottery clay, γ-Al 2 o 3 ; The clay 90 wt %, γ-Al 2 o 3 10wt%, additionally contains metal active components, the content of metal active components is clay and γ-Al 2 o 3 3wt% of the total amount.

[0028] The composition of the metal active component is: iron 20wt%, copper 30wt%, nickel 5wt%, zinc 10wt%, cobalt 3wt%, manganese 12wt%, tin 10wt%, antimony 8wt%, cerium 2wt%.

[0029] The bipolar three-dimensional electrode catalyst filler is spherical particles with a diameter of 10 mm.

[0030] The preparation method comprises the following steps: first, according to the ratio of pottery clay 90wt%, gamma-Al 2 o 3 10wt% weigh clay and γ-Al 2 o 3 , then add water equivalent to 67% of the weight of the pottery clay to the weighed pottery clay, stir to form a paste, and then add the weighed γ-Al 2 o 3 , stir evenly, then add the equivalent of pottery clay and γ-Al 2 o 3 3% met...

Embodiment 2

[0032] The bipolar three-dimensional electrode catalyst filler of this embodiment includes pottery clay, γ-Al 2 o 3 ; The clay 85 wt %, γ-Al 2 o 3 15 wt %, it also contains metal active components, and the content of metal active components is clay and γ-Al 2 o 3 5 wt % of the total amount.

[0033] The composition of the metal active component is: iron 25wt%, copper 25wt%, nickel 5wt%, zinc 10wt%, cobalt 1wt%, manganese 14wt%, tin 8wt%, antimony 7wt% and cerium 5wt%, each component weight The sum of the percentages is 100 wt %.

[0034] The bipolar three-dimensional electrode catalyst filler is spherical particles with a diameter of 4 mm.

[0035] The preparation method comprises the following steps: first according to the ratio of pottery clay 85wt%, gamma-Al 2 o 3 15wt% weigh clay and γ-Al 2 o 3 , then add water equivalent to 85% of the weight of the pottery clay to the weighed clay, stir to form a paste, and then add the weighed γ-Al 2 o 3 , stir evenly, then ...

Embodiment 3

[0037] The bipolar three-dimensional electrode catalyst filler of this embodiment includes pottery clay, γ-Al 2 o 3 ; The clay 80 wt %, γ-Al 2 o 3 20 wt %, it also contains metal active components, and the content of metal active components is clay and γ-Al 2 o 3 6 wt % of the total amount.

[0038] The composition of the metal active component is: iron 30wt%, copper 20wt%, nickel 5wt%, zinc 8wt%, cobalt 2wt%, manganese 15wt%, tin 10wt%, antimony 8wt% and cerium 2wt%, each component weight The sum of the percentages is 100%.

[0039] The bipolar three-dimensional electrode catalyst filler is spherical particles with a diameter of 5 mm.

[0040] The preparation method comprises the following steps: first, according to the ratio of pottery clay 80wt%, γ-Al 2 o 3 20wt% weigh clay and γ-Al 2 o 3 , then add water equivalent to 90% of the weight of the pottery clay to the weighed pottery clay, stir it into a paste, and then add the weighed γ-Al 2 o 3 , stir evenly, then...

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Abstract

Disclosed are a bipolar three-dimensional electrode catalyst packing and a preparation method thereof. The bipolar three-dimensional electrode catalyst packing comprises, by weight percent, 70-90% of pottery clay, 10-30% of gamma-Al2O3, and 3-10% of metal active component accounting for total amount of the pottery clay and the gamma-Al2O3. The bipolar three-dimensional electrode catalyst packing is large in surface area, high in catalytic activity, low in unit COD (chemical oxygen demand) energy consumption, less prone to active component losing, long in continuous service life and the like.

Description

technical field [0001] The invention relates to a bipolar three-dimensional electrode catalyst filler and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of the national economy, especially the development of related industries such as petrochemicals, printing and dyeing, explosives, medicine and pesticides, and the increase in sanitary landfills of urban domestic waste, resulting in high concentration, difficult biochemical degradation, acute or chronic The discharge of toxic organic pollutants and high-concentration ammonia-nitrogen wastewater has increased dramatically. [0003] At present, the treatment methods of this kind of wastewater mainly include physical methods, chemical methods, and biological methods. Physical methods, such as adsorption and extraction, are more common, but they are difficult to treat thoroughly and are likely to cause secondary pollution; chemical methods can also cause secondary polluti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/889B01J35/08C02F1/72C02F1/46
Inventor 孟勇李明殷杰黄力华尹笃林毛丽秋钟文周
Owner HUNAN NORMAL UNIVERSITY
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