Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof

A technology of attapulgite clay and nano-composite materials, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, refined hydrocarbon oil, etc., can solve the problems of changing the surface properties of palygorskite, low catalytic activity, environmental hazards, etc., and achieve Reduce preparation cost, improve catalytic performance, and improve performance

Inactive Publication Date: 2010-12-08
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research results reported in literature at home and abroad, in tar catalytic cracking and catalytic tar steam reforming, the catalytic activity of metal oxides is low, and treating palygorskite clay with acid for a long time will destroy the palygorskite crystal structure and change The surface properties of palygorskite. In addition, the pretreatment of clay in this preparation method consumes acid and produces acidic drainage. In the subsequent pH adjustment process, more alkali is consumed and high-salinity wastewater is discharged, which causes great harm to the environment.

Method used

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  • Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof
  • Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof
  • Attapulgite clay-Ni/Fe nano composite material, preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0036] Select the attapulgite clay ore that meets the requirements for pre-stocking and homogenization;

[0037] Add water to the stockpiled and homogenized attapulgite clay raw material, adjust the water content and mass ratio of attapulgite clay to 30-50%, and shear and extrude attapulgite clay flakes through double-roller and multi-roller extruders shape, which promotes the depolymerization and dispersion of attapulgite crystal bundles;

[0038] Attapulgite clay flakes are dried and pulverized into attapulgite clay powders passing through a 200-mesh sieve;

[0039] Add 100g of attapulgite powder into 500ml of water, age for 24 hours, then stir with a high-speed mixer at 10000r / min for 0.5 hours, the attapulgite clay becomes a uniform slurry, add 20g of ferric nitrate, stir for 20 minutes, add 10g Nickel nitrate, keep stirring until no bubbles are generated, then dropwise add 10% sodium hydroxide solution, stir at a high speed of 10000r / min for 5min, adjust the pH value of ...

Embodiment 2

[0046] Select the attapulgite clay ore that meets the requirements for pre-stocking and homogenization;

[0047] Add water to the stockpiled and homogenized attapulgite clay raw material, adjust the water content and mass ratio of attapulgite clay to 30-50%, and shear and extrude attapulgite clay flakes through double-roller and multi-roller extruders shape, which promotes the depolymerization and dispersion of attapulgite crystal bundles;

[0048] Attapulgite clay flakes are dried and pulverized into attapulgite clay powders passing through a 200-mesh sieve;

[0049] Add 100g of attapulgite powder into 1000mL of water, age for 24 hours, then stir with a high-speed mixer at 10000r / min for 0.5 hours, the attapulgite clay becomes a uniform slurry, add 30g of ferric nitrate, and continue stirring until no bubbles are generated. Then add 10% sodium hydroxide solution dropwise, stir with a high-speed mixer at 10000 r / min for 5 minutes, adjust the pH value of the suspension to be g...

Embodiment 3

[0055] Select the attapulgite clay ore that meets the requirements, and pulverize it into attapulgite clay powder that passes through a 200-mesh sieve;

[0056] According to the ratio of adding 1000mL water to 100g of attapulgite powder, add water to soak and age for 48 hours, stir with a high-speed mixer at 10000r / min for 0.5 hours, the attapulgite clay becomes a uniform slurry, add 20g of nickel nitrate, and continue stirring until no Bubbles are generated, then 10% sodium hydroxide solution is added dropwise, stirred at 10,000 r / min with a high-speed mixer for 5 minutes, and the pH value of the suspension is adjusted to be greater than 8, so that the added nickel ions are hydrolyzed completely.

[0057] Filter the suspension with a plate and frame filter press with washing function, wash, dehydrate into a mud cake, dry, and crush and sieve as required to obtain 0.1-0.2mm, 0.2-0.5mm, 0.5-1.0mm different particle sizes Particles to meet the requirements of catalytic reactors ...

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Abstract

An attapulgite clay-Ni / Fe nano composite material, a preparation method and applications thereof are characterized in that the attapulgite clay is taken as the raw material; metallic nickel and / or metallic iron particles with the diameter less than 20nm are loaded on the surface of attapulgite rhabdolith with the diameter between 40 and 50nm; the preparation method is that the attapulgite clay isprepared into suspension liquid, then the suspension liquid is hydrolyzed with iron salt and nickel salt and loaded on the surface of attapulgite crystal in the precipitation form of hydroxide, and finally the composite material is prepared through washing, dehydration, forming, drying and hydrogen reduction and calcination. With a nano structure, the composite material has low activation energy,high catalytic activity and strong resistance to carbon deposit, and can be applied to catalytic pyrolysis and purification of thermal gas and tar of a biomass gasification furnace and the catalytic pyrolysis of other various organisms.

Description

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 nickel and / or iron nano-metal particles as an active component, a preparation method and its application in catalytic cracking and purification of tar from biomass gasification gas. Background technique [0002] my country produces about 1 billion tons of various straws every year, and agricultural and forestry products and industrial enterprises that use biomass as raw materials also produce hundreds of millions of tons of processing residues. Biomass resources are a renewable and clean energy that can achieve CO 2 Zero emissions, greatly reducing the greenhouse effect and environmental pollution. The development and utilization of biomass energy to replace mineral energy such as petroleum and coal is one of the important ways to solve energy and environmental problems. Judging from the current research progress, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/745B01J21/16B01J37/18B01J20/12C10G11/02C10G25/00
Inventor 陈天虎刘海波张先龙何宏平
Owner HEFEI UNIV OF TECH
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