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Catalyst for removing dioxin-type halogenated aromatic compounds and preparation method thereof

A dioxin and catalyst technology, which is applied in the field of catalysts for removing dioxin-like aromatic halogenated compounds and their preparation fields, can solve problems such as air pollution, achieve high conversion rate, high removal efficiency and easy The effect of commercialization

Inactive Publication Date: 2009-12-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the incineration temperature is lower than 800°C, and chlorine-containing garbage such as plastics is not completely burned, which easily generates dioxin-like persistent organic pollutants; Chemical substances, especially chlorine-based chemicals, such as pesticides, herbicides, wood preservatives, defoliants, polychlorinated biphenyls, and other products will also produce dioxins, resulting in air pollution

Method used

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  • Catalyst for removing dioxin-type halogenated aromatic compounds and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0017] In a 50ml ball mill jar, add 0.04 grams of ammonium metavanadate (NH4VO 3 ), 6 grams of manganese carbonate (MnCO 3 ) and 32.36 grams of anatase titanium dioxide (TiO 2 ), on a QM-C1300 planetary ball mill, after 300r / min ball milling for 3h, calcined at 600°C in air for 1h, and then the calcined mixture and 0.04 g of multi-walled carbon nanotubes (CNTs), 300r / min ball milled for 1h , to obtain vanadium-manganese / titanium oxide-multi-walled carbon nanotube catalyst [V-Mn / TiO 2 -CNTs], the catalyst contains (weight percent): 0.1% of vanadium, 15% of manganese, 0.1% of carbon nanotubes, and 84.8% of titanium oxide.

[0018] The conversion rate of this catalyst to remove chlorobenzene is shown in Table 1.

Embodiment 2

[0020] In a 50ml ball mill jar, add 2 grams of ammonium metavanadate (NH4VO 3 ), 4 grams of ditungsten trioxide (W 2 o 3 ) and 32.4 grams of anatase titanium dioxide (TiO 2 ), on a QM-C 1300 planetary ball mill, after 300r / min ball milling for 3h, calcined in air at 500°C for 3h, and then the calcined mixture and 1.6 g of multi-walled carbon nanotubes (CNTs), 300r / min ball mill 2h, the vanadium-tungsten / titanium oxide-multi-walled carbon nanotube catalyst [V-W / TiO 2 -CNTs], the catalyst contains (percentage by weight): 5% vanadium, 10% tungsten, 4% carbon nanotubes, and 81% titanium oxide.

[0021] The conversion rate of this catalyst to remove chlorobenzene is shown in Table 1.

Embodiment 3

[0023] In a 50ml ball mill jar, add 2.4 grams of ammonium metavanadate (NH4VO 3 ), 0.4 grams of cerium oxide (CeO 2 ) and 35.6 grams of anatase titanium dioxide (TiO 2 ), on a QM-C1300 planetary ball mill, after ball milling at 300r / min for 3h, calcining at 350°C in air for 5h, and then the calcined mixture and 4 grams of multi-walled carbon nanotubes (CNTs), ball milling at 300r / min for 3h , to obtain vanadium-cerium / titanium oxide-multi-walled carbon nanotube catalyst [V-Ce / TiO 2 -CNTs], the catalyst contains (weight percent): 6% of vanadium, 1% of cerium, 10% of carbon nanotubes, and 83% of titanium oxide.

[0024] The conversion rate of this catalyst to remove chlorobenzene is shown in Table 1.

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Abstract

The catalyst for removing dioxin-type halogenated aromatic compounds of the invention is a catalyst which adopts titanium dioxide and carbon nanotubes as carriers and vanadium and a transition metal as active ingredients; the weight percent of the components is as follows: 0.1-6% of vanadium, 1-15% of transition metal, 0.1-10% of carbon nanotubes and the allowance titanium dioxide; wherein, the transition metal is Mn, Fe, W, Co, Ni, Cu, Cr or Mo. The catalyst of the invention contains no noble metal, the raw materials are accessible, binary carriers are used to increase the surface area the catalyst and the conversion rate for removing the dioxin-type halogenated aromatic compounds is high; high energy ball milling method is adopted in preparation method, the production process and the devices are very simple, the preparation method has no pollution, the catalyst is applicable to the industrialized mass production and is easily commercialized.

Description

technical field [0001] The invention relates to a catalyst for removing dioxin-like aromatic halogenated compounds and a preparation method thereof. Background technique [0002] In China, with the process of urbanization and the improvement of people's living standards, more and more industrial waste and domestic waste are produced, and more and more waste is disposed of through incineration. However, the incineration temperature is lower than 800°C, and chlorine-containing garbage such as plastics is not completely burned, which easily generates dioxin-like persistent organic pollutants; Chemical substances, especially chlorine-based chemicals, such as pesticides, herbicides, wood preservatives, defoliants, polychlorinated biphenyls, and other products will also produce dioxins and air pollution. [0003] Dioxins (which are one of the major air pollutants) are organic compounds of two benzene rings linked together by oxygen, and are polychlorinated dibenzo-p-dioxins conta...

Claims

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Application Information

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IPC IPC(8): B01J23/847B01J23/34B01J23/22B01J23/30B01J23/10B01J23/28B01J37/04B01J37/08B01D53/70A62D3/00A62D101/28
Inventor 侯田锋樊孝玉张孝彬杨杭生
Owner ZHEJIANG UNIV
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