Method for preparing transitional metal/active carbon catalyst

A transition metal and activated carbon technology, applied in the field of chemical treatment of combustion exhaust gas, can solve the problems of limited activity promotion space and low catalyst loading, and achieve the effect of simple operation, low cost and uniform particle size distribution

Active Publication Date: 2011-11-16
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because the activated carbon carrier has a very large specific surface area, pore volume, and strong adsorption properties, it has been used in the field of PCBs and dioxin treatment and disposal. Metal / activated carbon catalysts have been used in the decomposition of dioxins. Research, preparation The traditional impregnation method of metal / activated carbon is obtained by excessive impregnation of activated carbon with metal salt solution and then dry carbonization. However, the catalyst loading obtained by this method is low, and its activity improvement space is thus limited. Therefore, it is necessary to explore new metals. / Activated carbon catalyst preparation method is used to prepare the catalyst of high load, further improves the activity of metal / activated carbon catalyst

Method used

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  • Method for preparing transitional metal/active carbon catalyst
  • Method for preparing transitional metal/active carbon catalyst
  • Method for preparing transitional metal/active carbon catalyst

Examples

Experimental program
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Effect test

preparation example Construction

[0021] The preparation method is realized through the following steps:

[0022] The first step, the loading of ion exchange resin;

[0023] Take a certain amount of ion-exchange resin and soak it in deionized water for 4-6 hours to remove the water-soluble impurities, and then place it in the ion-exchange column to prepare an ammonia solution containing a certain amount of transition metal sulfate, with 10-50mL / The flow rate of min is to perform ion exchange on the ion exchange resin for 1 to 2 hours. After the exchange, the ion exchange resin is washed with deionized water, and then dried in an oven at 70°C for 24 hours to obtain an ion exchange resin loaded with transition metals.

[0024] Second step, carbonization of ion exchange resin;

[0025] The carbonization of the ion-exchange resin is carried out in a high-temperature carbonization device, and the high-temperature carbonization device includes a high-purity nitrogen cylinder 1, a rotameter 2, a quartz tube furnace...

Embodiment 1

[0029] The present invention provides a kind of preparation method of transition metal / activated carbon catalyst, taking transition metal zinc / activated carbon as an example, mainly comprises the following steps to realize:

[0030] The first step, the loading of ion exchange resin, concrete steps are:

[0031] (1) Take by weighing 5g weakly acidic cation exchange resin (WK-11, Japan Mitsubishi Chemical Industry), its structural formula is as follows:

[0032]

[0033] Soak in 100mL deionized water for 4h to remove water-soluble impurities contained in the resin.

[0034] (2) Prepare an aqueous ammonia solution containing a certain amount of zinc sulfate, including 10gZnSO 4 ·7H 2 O, 100mL deionized water and 100mL mass fraction are 15% ammoniacal liquor.

[0035] (3) Fill the soaked ion-exchange resin into the ion-exchange column, and circulate and exchange the resin with an ammonia solution of zinc sulfate at a flow rate of 50 mL / min for 2 hours.

[0036] (4) After th...

Embodiment 2

[0044] This embodiment takes the preparation of transition metal nickel / activated carbon catalyst as an example to describe in detail, mainly through the following steps:

[0045] The first step, the loading of ion exchange resin, concrete steps are:

[0046] (1) Weigh 5 g of weakly acidic cation exchange resin (WK-11, Mitsubishi Chemical Industry), the structural formula of which is the same as in Example 1, soak in 100 mL of deionized water for 4 hours to remove water-soluble impurities contained in the resin.

[0047] (2) preparation contains the ammoniacal solution of a certain amount of nickel sulfate, comprises 10.5gNiSO 4 ·6H 2 O, 100mL deionized water and 100mL mass fraction are 15% ammoniacal liquor.

[0048] (3) Fill the soaked ion-exchange resin into the ion-exchange column, and circulate and exchange the resin with an ammonia solution of nickel sulfate at a flow rate of 50 mL / min for 2 hours.

[0049] (4) After the exchange, the nickel-loaded resin was washed wi...

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Abstract

The invention discloses a method for preparing a transitional metal/active carbon catalyst and belongs to the technical field of burnt gas chemical treatment and application. The preparation method comprises a step of loading an ion exchange resin and a step of carbonizing the ion exchange resin. The catalyst preparation method provided by the invention has the advantages of simple, convenient and easy operation, readily available raw material and low cost; and the load rate of the prepared transitional metal/active carbon catalyst is over 50 percent which is 10 to 40 times higher than that of a catalyst prepared by the common immersion method. The transitional metal/active carbon catalyst prepared by the invention, besides retaining the spherical shape of the original ion exchange resin,also has the advantages of uniform particle size distribution, smooth surface, uniform distribution of the transitional metal in and on the surface of the active carbon, and the like.

Description

technical field [0001] The invention belongs to the technical field of chemical treatment of combustion exhaust gas, and in particular relates to a method for preparing a transition metal / activated carbon catalyst. Background technique [0002] Because the activated carbon carrier has a very large specific surface area, pore volume, and strong adsorption properties, it has been used in the field of PCBs and dioxin treatment and disposal. Metal / activated carbon catalysts have been used in the decomposition of dioxins. Research, preparation The traditional impregnation method of metal / activated carbon is obtained by excessive impregnation of activated carbon with metal salt solution and then dry carbonization. However, the catalyst loading obtained by this method is low, and its activity improvement space is thus limited. Therefore, it is necessary to explore new metals. / Activated carbon catalyst preparation method is used to prepare the catalyst of high load, further improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J37/00B01J23/06B01J23/755B01J23/72B01J23/745B01J23/75B01J23/44
Inventor 孙轶斐付心朱天乐
Owner BEIHANG UNIV
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