Attapulgite-perovskite composite material, preparation method and application thereof

A composite material and attapulgite technology, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problem of insufficient attention to emissions, and achieve reduction in preparation cost, load reduction, and catalytic activity. Effect

Active Publication Date: 2014-04-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the control and treatment of air pollution in my country are mostly focused on the technical research and industrial promotion of flue gas dust removal, desulfurization, and denitrification of large-scale fixed sources such as power plants and boilers. In contrast, volatile organic waste gases, such as benzene series organic waste gases emissions have not attracted enough attention

Method used

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  • Attapulgite-perovskite composite material, preparation method and application thereof
  • Attapulgite-perovskite composite material, preparation method and application thereof
  • Attapulgite-perovskite composite material, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] 1. Pour the attapulgite clay ore mined from the mine on the ground of the ore stockyard, pave the thickness not to exceed 10cm, and transport it to the conical ore pile after drying for 3-5 days. The average ore stockpiling time is 1-6 During the storage process, the ore experienced natural weathering, natural crushing and mixing and homogenization to improve the uniformity of ore raw materials. Raw materials are taken from ore piles in a vertical way.

[0038] 2. Add water to the attapulgite clay material taken out from the ore pile, so that the water content of the attapulgite clay is 30-50%. After mixing evenly, the attapulgite is obtained by shearing and extruding with a pair of rollers or a multi-roller extruder. Clay flakes promote the depolymerization and dispersion of attapulgite crystal bundles.

[0039] 3. Attapulgite clay flakes were dried at 105° C., crushed and passed through a 200-mesh sieve to obtain attapulgite clay powder.

[0040] 4. Add 50g of attap...

Embodiment 2

[0046] The preparation method of step 1-3 is the same as embodiment 1.

[0047] 4. Add 50g of attapulgite powder into 1000ml of water, age for 24 hours, and then use a high-speed mixer to stir at a high speed of 10000r / min for 0.5 hours to obtain a uniformly mixed slurry, and add 7.00g of lanthanum nitrate (La( NO 3 ) 3 ·6H 2 O analytically pure), stirred for 10 minutes, then added 0.38g strontium nitrate (Sr(NO 3 ) 2 Analytical pure), continue stirring for 20 minutes, then add 6.43g manganese nitrate (containing Mn(NO 3 ) 2 50% analytical purity), continue to stir until no bubbles are generated, then add ammonia solution dropwise, stir at a high speed of 10000r / min for 10min, adjust the pH value to 8-10 to obtain a suspension, and hydrolyze the added lanthanum ions, strontium ions and manganese ions completely.

[0048] 5. Filter the suspension with a plate and frame filter press with washing function, wash and dehydrate to obtain a mud cake, dry the mud cake, crush an...

Embodiment 3

[0053] The preparation method of step 1-3 is the same as embodiment 1.

[0054] 4. Add 50g of attapulgite powder into 1000ml of water, age for 24 hours, then use a high-speed mixer to stir at a high speed of 10000r / min for 0.5 hours to obtain a uniformly mixed slurry, and add 8.03g of lanthanum nitrate (La( NO 3 ) 3 ·6H 2 O analytically pure), stirred for 10 minutes, then added 1.68g strontium nitrate (Sr(NO 3 ) 2 Analytical pure), continue stirring for 20 minutes, then add 9.48g manganese nitrate (containing Mn(NO 3 ) 2 50% analytical purity), continue to stir until no bubbles are generated, then add ammonia solution dropwise, stir at a high speed of 10000r / min for 10min, adjust the pH value to 8-10 to obtain a suspension, and hydrolyze the added lanthanum ions, strontium ions and manganese ions completely.

[0055] 5. Filter the suspension with a plate and frame filter press with washing function, wash and dehydrate to obtain mud cake, dry the mud cake, crush and siev...

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Abstract

The invention discloses an attapulgite-perovskite composite material, a preparation method and application thereof, wherein the attapulgite-perovskite composite material is a composite material obtained by loading perovskite particles on the surface of attapulgite by taking attapulgite clay as a carrier, and the load capacity of the perovskite is 6-12 percent of the mass of the attapulgite clay. The composition of the composite material is mu%La1-xSrxMnO3 / PG, wherein mu is 6-12, and x is 0, 0.1 or 0.3. The composite material disclosed by the invention is of a nano structure, has the advantages of low activation capacity, high catalyst activity and strong capacity of resisting inactivation and can be applied to the purification of volatile organic pollutants such as toluene and the like and the catalysis and oxidization of other various organic matters.

Description

1. Technical field [0001] The invention belongs to the field of energy and chemical industry, and relates to a nano material with attapulgite clay as a carrier and perovskite compound nano particles as an active component, a preparation method and an application for removing volatile organic pollutants. 2. Background technology [0002] Volatile organic compounds (VOCs) usually refer to organic compounds with a boiling point of 50-260°C under normal pressure, such as alkanes, alkenes, aromatic hydrocarbons, chlorinated aromatic hydrocarbons, saturated and unsaturated aldehydes, ketones, etc. VOCs mainly come from exhaust gases emitted by industries such as petroleum, chemical industry, papermaking, paint coatings, mining, metal electroplating, and textiles, as well as exhaust gases emitted by many vehicles. [0003] According to statistics, from 2005 to 2010, the total emission of VOCs in my country was about 26.5-31 million tons. In 2010, only about 3.88 million tons of VOC...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/34B01J35/00B01D53/72B01D53/86
Inventor 吴文涛陈天虎宋磊谢晶晶朱承驻彭书传
Owner HEFEI UNIV OF TECH
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