A method for preparing nano-copper ferrite composite oxygen carrier by microwave hydrothermal method

A microwave hydrothermal method and nano-iron technology, applied in the direction of nanotechnology, nanotechnology, iron compounds, etc., can solve the problems of easy agglomeration, uneven particles, poor reaction performance, etc., and achieve short reaction time and complete grain development , the effect of low reaction temperature

Inactive Publication Date: 2016-01-13
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, CuFe prepared by traditional calcination method 2 o 4 Particles are not uniform, easy to agglomerate, poor reaction performance

Method used

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  • A method for preparing nano-copper ferrite composite oxygen carrier by microwave hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 2.42gCu(NO 3 ) 2 ·3H 2 O and 8.08gFe(NO 3 ) 3 9H 2 O was dissolved in 200ml deionized water, ultrasonicated for 45min, and mixed evenly;

[0025] Add excess ammonia solution dropwise in the solution until the pH of the solution is 10, so that the precipitation is complete. Continue ultrasound for 60 minutes;

[0026] The precipitate was separated with a centrifuge and washed with deionized water until neutral;

[0027] Put the precipitate into the reaction kettle, add 1ml of dodecyltrimethylammonium bromide (DTAB) surfactant for modification, then add 200ml of deionized water, and place the reaction kettle in a microwave oven with a water-cooled reflux device Heating, holding at 180°C for 10 hours, separating the solid product after heating; washing and drying after natural cooling to obtain nano-copper ferrite.

[0028] With the nano-copper ferrite prepared above as an oxygen carrier, such as figure 1 mentioned.

[0029] The oxygen carrier particles prep...

Embodiment 2

[0031] Take 2.42gCu(NO 3 ) 2 ·3H 2 O and 8.08gFe(NO 3 ) 3 9H 2 O was dissolved in 200ml deionized water, ultrasonicated for 60min, and mixed evenly;

[0032] Add excess ammonia solution dropwise in the solution until the pH of the solution is 11 to make the precipitation complete. Continue ultrasound for 70min;

[0033] Separate the precipitate with a centrifuge and wash with deionized water until neutral;

[0034] Put the precipitate into the reaction kettle, add 1ml of polyethylene glycol (PEG), and then add 200ml of deionized water, place the reaction kettle in a microwave oven with a water-cooled reflux device and heat it at 200°C for 10h. After the heating is completed Separating the solid product; washing and drying after natural cooling to obtain the nano-copper ferrite oxygen carrier.

[0035] The oxygen carrier particles prepared above were sieved, and 0.2 g of the oxygen carrier with a particle size of 100-150 mesh was taken for performance testing in a small...

Embodiment 3

[0037] Take 2.42gCu(NO 3 ) 2 ·3H 2 O and 8.08gFe(NO 3 ) 3 9H 2 O was dissolved in 200ml deionized water, ultrasonicated for 90min, and mixed evenly;

[0038] Add excess ammonia solution dropwise to the solution until the pH of the solution is 12 to complete the precipitation. Continue ultrasound for 90 minutes;

[0039] Separate the precipitate with a centrifuge and wash with deionized water until neutral;

[0040] Put the precipitate into the reactor, add 1ml of polyethylene glycol (PEG), then add 250ml of deionized water, heat the reactor in a microwave oven with a water-cooled reflux device, keep it at 220°C for 20h, and separate after heating Solid product; after natural cooling, wash and dry to obtain nano-copper ferrite oxygen carrier.

[0041] The oxygen carrier particles prepared above were sieved, and 0.2 g of the oxygen carrier with a particle size of 100-150 mesh was taken for performance testing in a small quartz fluidized bed. The composition of the gaseo...

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Abstract

The invention discloses a method for preparing a nano-copper ferrite composite oxygen carrier by a microwave hydrothermal method, belonging to the technical field of chemical chain combustion. The method disclosed by the invention comprises the following steps: dissolving copper nitrate and ferric nitrate in deionized water, then performing ultrasonic treatment, dropwise adding excess ammonia water / urea solution, regulating the PH, performing centrifugal separation, washing a precipitate to be neutral, then placing the precipitate into a reaction kettle, adding a dispersing agent, adding the deionized water till 2 / 3-3 / 4 of the volume of the reaction kettle, placing the reaction kettle in a microwave oven with a water-cooled reflux device for heating, heating at the temperature of 150-220 DEG C for 10-20 hours, then cooling to room temperature and drying to get nano-copper ferrite. The copper ferrite prepared by adopting a hydrothermal synthesis method not only has uniform particle size, complete grain development and no agglomeration, but also is short in reaction time and low in reaction temperature. The copper ferrite prepared by applying the method disclosed by the invention has great application prospects in chemical chain combustion.

Description

technical field [0001] The invention belongs to the technical field of chemical looping combustion, and in particular relates to a method for preparing nanometer copper ferrite composite oxygen carrier by a microwave hydrothermal method. Background technique [0002] Climate and climate change have had a great impact on social and economic development and human progress, and have become a hot spot and key issue of concern to the international community. while CO 2 The greenhouse effect caused accounts for 64% of the total greenhouse effect, and the development of CO 2 Capture and storage technologies have become necessary. Chemical looping combustion is a very promising CO 2 Capture technology has the advantages of low cost, high efficiency, and environmental friendliness, and has received more and more attention in recent years. [0003] Oxygen carrier is one of the key factors for the success of chemical looping combustion. In chemical looping combustion, it transfers ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00B82Y30/00
Inventor 覃吴李渠王磊董长青杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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