Calcium-containing cobalt-based composite oxygen carrier and preparation method therefor

An oxygen carrier, cobalt-based technology, used in fuel additives, petroleum industry, fuels, etc., can solve the problems of insufficient reaction rate, reduced oxygen carrier activity and cycle stability, easy sintering, etc., to achieve the oxygen release rate. and oxygen release quality, the preparation method is simple, and the dispersion is good.

Inactive Publication Date: 2016-04-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Metal oxide oxygen carriers have received extensive attention due to their high reactivity and high temperature resistance, but there are still disadvantages such as insufficient reaction rate.
[0006] Wang Jie, Wang Wenju, etc. Research progress of oxygen carrier in chemical looping combustion technology [J]. Modern Chemical Industry, 2012,32(11):13-17. Co 3 o 4 The activity and cycle stability of the oxygen carrier decrease at high temperature, and it is prone to sintering, and the reaction rate is not fast enough, etc.

Method used

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  • Calcium-containing cobalt-based composite oxygen carrier and preparation method therefor

Examples

Experimental program
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Embodiment 1

[0024] Take 38.62gCo(NO 3 ) 2 ·6H 2 O is put into a 500ml beaker, add 100ml of distilled water, then place the beaker on a magnetic stirrer with a constant temperature water bath, and the stirring speed is 400rpm. Take 4.86gCa(NO 3 ) 2 4H 2 O into a 100ml beaker, add 50ml of distilled water, stir until completely dissolved. Then add the calcium nitrate solution dropwise to the copper nitrate solution, and stir while adding dropwise. Take 49.87g of citric acid, put it into a beaker with 100ml of distilled water and stir until it is completely dissolved. After the above solution is stirred evenly, slowly add the citric acid solution, and stir while adding it dropwise. After stirring for 6 hours, the solution had dehydrated into a viscous wet gel. The wet gel was placed in a blast drying oven at 105° C., and after drying for 24 hours, the wet gel in the beaker became a dry gel. Take out the xerogel, place it in a muffle furnace at 500°C for calcination for 5 hours until c...

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Abstract

The invention discloses a calcium-containing cobalt-based composite oxygen carrier and a preparation method therefor. The oxygen carrier is composed of Co3O4 and CaO, wherein the mass percentage of Co3O4 is 95% and the mass percentage of CaO is 5%. According to the preparation method disclosed by the invention, the calcium-containing cobalt-based composite oxygen carrier which is uniform in grain size and good in dispersity is prepared by controlling appropriate reaction conditions by virtue of a sol-gel method. The calcium-containing cobalt-based composite oxygen carrier is simple in preparation method, and the prepared composite oxygen carrier has a relatively great reaction rate, and the oxygen release rate is obviously increased.

Description

technical field [0001] The invention belongs to the technical field of preparation of oxygen carrier particles in a chemical chain oxygen decoupling system, and in particular relates to a calcium-cobalt-based composite oxygen carrier and a preparation method thereof. Background technique [0002] The problem of global warming caused by greenhouse gas emissions is attracting people's attention. CO 2 As the most important greenhouse gas, the study of CO 2 Emission reduction technologies are imminent. CO in flue gas 2 Often diluted with large amounts of nitrogen, CO 2 The cost of separation and recovery is very high. High concentrations of CO are produced during combustion 2 or facilitate CO 2 It is an effective way to separate the gas phase mixture and eliminate the formation and emission of other pollutants. Chemical-Looping Combustion (CLC for short) is a new type of combustion with the above characteristics, and has received more attention. [0003] The basic princ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L10/00
Inventor 王文举程明张彬
Owner NANJING UNIV OF SCI & TECH
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