A kind of composite oxygen carrier particle and preparation method thereof

An oxygen carrier and particle technology, which is used in solid fuels, petroleum industry, fuel additives, etc., to achieve the effects of environmental friendliness, excellent reactivity and low price

Inactive Publication Date: 2011-12-14
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to solve the defects of high price and low activity in the prior art, the present invention provides a composite oxygen carrier particle and its preparation method, the method is simple and the price Inexpensive, the oxygen carrying capacity of the prepared oxygen carrier is also higher than other metal oxide oxygen carriers

Method used

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  • A kind of composite oxygen carrier particle and preparation method thereof
  • A kind of composite oxygen carrier particle and preparation method thereof
  • A kind of composite oxygen carrier particle and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Get 38g of calcium sulfate (CaSO 4 ) particles and 10.1g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Place in 100ml of deionized water, stir and mix evenly, and then place in a magnetic stirrer heated at a constant temperature of 110°C until the moisture in the reactor is dried to form a dry load product, and after a little grinding, uniform particles can be obtained Finally, put the collected product in a muffle furnace at 550°C for decomposition and calcination to obtain iron oxide-type calcium sulfate composite oxygen carrier particles with a uniform particle loading weight ratio of 5%.

Embodiment 2

[0025] Take 36g of calcium sulfate (CaSO 4 ) particles and 20.2g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Place in 100ml of deionized water, stir and mix evenly, and then place in a magnetic stirrer heated at a constant temperature of 110°C until the moisture in the reactor is dried to form a dry load product, and after a little grinding, uniform particles can be obtained The diameter of the untreated composite oxygen carrier, and finally the collected product is placed in a 550 °C muffle furnace for decomposition and calcination to obtain iron oxide calcium sulfate composite oxygen carrier particles with a uniform particle loading weight ratio of 10%.

[0026] Example 2:

[0027] Take 34g of calcium sulfate (CaSO 4 ) particles and 77.8g ferric nitrate nonahydrate (Fe(NO 3 ) 3 9H 2 O) Place in 100ml of deionized water, stir and mix evenly, and then place in a magnetic stirrer heated at a constant temperature of 110°C until the moisture in the reactor is dried to ...

Embodiment 3

[0029] Take 36g of calcium sulfate (CaSO 4 ) particles and 6.92g of zinc nitrate hexahydrate (Zn(NO 3 ) 2 ·6H 2 O) Place in 100ml of deionized water, stir and mix evenly, and then place in a magnetic stirrer heated at a constant temperature of 110°C until the moisture in the reactor is dried to form a dry load product, and after a little grinding, uniform particles can be obtained The diameter of the untreated composite oxygen carrier, and finally the collected product was placed in a 550 °C muffle furnace for decomposition and calcination to obtain zinc oxide calcium sulfate composite oxygen carrier particles with a uniform particle loading weight ratio of 5%.

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Abstract

The invention discloses a composite oxygen carrier particle, which uses calcium sulfate with a particle size of 0.3-0.45mm as the main raw material, and nitrate as the active component, and adopts a chemical impregnation method to obtain the load after drying, calcining and grinding. There are composite oxygen carrier particles corresponding to oxides, and the loading amount of oxides is 5% to 30%. The nitrate is any one of ferric nitrate nonahydrate, zinc nitrate hexahydrate or copper nitrate trihydrate. The preparation is to add calcium sulfate particles and nitrate active components with a particle size of 0.3 to 0.45mm into deionized water, stir until the solution is evenly mixed, place it in a magnetic stirrer, heat and stir at a constant temperature until the water is fully evaporated, The product is then taken out and milled to obtain a calcium sulfate-loaded product with uniform particle size distribution, and finally decomposed and calcined in a muffle furnace at 550°C to obtain composite oxygen carrier particles. The preparation method is simple, the price is low, and the oxygen carrying capacity of the oxygen carrier is also higher than that of other metal oxide oxygen carriers.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of oxygen carrier particles in a chemical looping combustion system, and relates to a cheap and high-efficiency composite oxygen carrier particle which is suitable for chemical looping combustion using coal as fuel, and improves carbon conversion rate and outlet carbon dioxide concentration. its preparation method. Background technique: [0002] Chemical looping combustion technology is a brand-new combustion technology that realizes high-efficiency and low-cost CO 2 catch. The basic principle of chemical looping combustion is to achieve indirect combustion of air and fuel through the reduction and oxidation reactions of oxygen carriers. The CLC system consists of an oxidation reactor, namely an air reactor, a reduction reactor, namely a fuel reactor, and an oxygen carrier. Among them, the oxygen carrier is usually composed of a metal oxide and a carrier. The metal oxide is a substance t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L9/10C10L10/00
Inventor 肖睿刘健
Owner SOUTHEAST UNIV
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