Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Thermal storage oxygen carrier of core-shell structure and preparation method thereof

A core-shell structure and oxygen carrier technology, which is applied in the preparation of microspheres, microcapsule preparations, petroleum industry, etc., can solve the problems of uneven temperature distribution, unfavorable system stable operation, accelerated oxygen carrier breakage and sintering, etc., and achieves easy control. , good heat storage and oxygen carrying capacity, the effect of improving mechanical strength

Inactive Publication Date: 2013-02-13
KUNMING UNIV OF SCI & TECH
View PDF6 Cites 21 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no matter in the fuel reactor or the air reactor, the oxygen carrier bed layer has uneven temperature distribution in the lateral and axial directions, especially in the air reactor due to intense heat release and hot spots.
Thermal shock caused by temperature instability and the appearance of hot spots will accelerate the fragmentation and sintering of oxygen carriers, which is not conducive to the stable operation of the system

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Grinding Na with a ball mill 2 CO 3 Nanoscale microspheres up to 300nm;

[0028] (2) Disperse the nano-microspheres in step (1) in a mixture of CTAB (cetyltrimethylammonium bromide) and ethanol at 5 g / mL to form a suspension, and the suspension is subjected to ultrasonic conditions Under stirring, the nano-microspheres are evenly dispersed in the solution; wherein, the mixed solution of CTAB and ethanol is to dissolve CTAB in absolute ethanol, so that the concentration of CTAB in the mixed solution is 0.15mol / L;

[0029] (3) Add the suspension obtained in step (2) into TBOT (butyl titanate) slowly and dropwise together with ammonia water under stirring conditions until the pH value of the suspension is 9;

[0030] (4) Dissolve ferric nitrate and aluminum nitrate in deionized water at a mass ratio of 3:2 so that the salt concentration is 0.5mol / L;

[0031] (5) Add the solution prepared in step (4) dropwise to the suspension obtained in step (3) at a volume ratio o...

Embodiment 2

[0035] (1) Use a ball mill to grind sodium chloride to nano-sized microspheres of 1-100nm;

[0036] (2) Disperse the nano-microspheres in step (1) in a mixture of CTAB (cetyltrimethylammonium bromide) and ethanol at 1g / mL to form a suspension. Under stirring, the nano-microspheres are evenly dispersed in the solution; wherein, the mixed solution of CTAB and ethanol is to dissolve CTAB in absolute ethanol, so that the concentration of CTAB in the mixed solution is 0.25mol / L;

[0037] (3) Add the suspension obtained in step (2) into TBOT (butyl titanate) slowly and dropwise together with ammonia water under stirring conditions until the pH value of the suspension is 10;

[0038] (4) Dissolve cobalt nitrate and aluminum nitrate in deionized water at a mass ratio of 3:2, so that the concentration of the salt is 1mol / L;

[0039] (5) Add the solution prepared in step (4) dropwise to the suspension obtained in step (3) at a volume ratio of 1:1 in a water bath at 70°C, and keep stirr...

Embodiment 3

[0043] (1) Use a ball mill to grind the aluminum-silicon alloy to nano-scale microspheres of 400-500nm;

[0044] (2) Disperse the nano-microspheres in step (1) in a mixture of CTAB (cetyltrimethylammonium bromide) and ethanol at 10 g / mL to form a suspension. Under stirring, the nano microspheres are evenly dispersed in the solution; wherein, the mixed solution of CTAB and ethanol is to dissolve CTAB in absolute ethanol, so that the concentration of CTAB in the mixed solution is 0.08mol / L;

[0045] (3) Add the suspension obtained in step (2) into TBOT (butyl titanate) slowly and dropwise together with ammonia water under stirring conditions until the pH value of the suspension is 11;

[0046] (4) Dissolve nickel nitrate and aluminum nitrate in deionized water at a mass ratio of 3:2, so that the salt concentration is 2mol / L;

[0047] (5) Add the solution prepared in step (4) dropwise to the suspension obtained in step (3) at a volume ratio of 1:1 in a water bath at 70°C, and ke...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a thermal storage oxygen carrier of a core-shell structure and a preparation method thereof. The oxygen carrier is of a double-shell structure, namely a high-temperature phase change heat storage material. An inner shell is TiO2, and an outer shell is made of an oxygen carrier material. The method includes that the high-temperature phase change heat storage material is ground to nanoscale microballoons and dispersed in a mixed liquor of cetyl trimethyl ammonium bromide (CTAB) and ethanol to form turbid liquid, the turbid liquid and ammonia water parallelly flow and are dropped into tetra-n-butyl titanate (TBOT) slowly, a nitrate and aluminum nitrate solution is dropped into the turbid liquid gradually, stirring is conducted continuously in a dropping process, and sediment is generated; and then centrifugal processing is conducted, the sediment is washed through absolute ethyl alcohol and deionized water, the sediment is dried and baked, and the thermal storage oxygen carrier is obtained. The structure is favorable for protecting and fixing an inner-core thermal storage material becoming liquid at high temperature. Simultaneously, a frit reaction is prevented from happening between the inner-core thermal storage material and the outermost-layer oxygen carrier material, and the mechanical strength of the oxygen carrier is improved. The preparation method is simple and easy to control.

Description

technical field [0001] The invention relates to a heat storage type oxygen carrier with a core-shell structure and a preparation method thereof, belonging to the field of efficient and clean utilization of energy. Background technique [0002] Chemical looping combustion technology is a new type of combustion technology with distinctive characteristics of energy saving and emission reduction. It has CO 2 Internal separation properties, no need to add CO 2 The separation device can capture high-purity CO 2 gas. Chemical looping combustion utilizes the high-grade energy in the chemical looping combustion system to realize energy cascade utilization and improve energy efficiency. This method does not require a lot of energy consumption in the two processes of combustion and separation, separation and recovery of CO 2 Does not require additional energy consumption, does not reduce system efficiency, and recovers CO 2 And control of NOx has an absolute advantage. [0003] C...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C10L10/00B01J13/02
Inventor 李孔斋刘自松王华魏永刚祝星杜云鹏杨丽田俊杰
Owner KUNMING UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com