Preparation method and application of high-temperature composite phase change regenerative oxygen carrier of iron lanthanum oxide-(copper-aluminum@alumina)

A composite phase transition, lanthanum iron oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, heterogeneous catalyst chemical elements, etc. The problem of low speed is to achieve stable catalytic activity, prevent copper and aluminum leakage, and good heat resistance.

Active Publication Date: 2019-01-04
KUNMING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the Ni-based oxygen carrier has very high reactivity, it is easy to generate toxic sulfides during the reaction process, and its own porous nature leads to a low reaction rate; the Cu-based oxygen carrier is easily decomposed into Cu 2 O, and under high-temperature reaction conditions, sintering often occurs due to its low melting point, and the reaction rate of Cu-based oxygen carriers decreases rapidly after several cycles of reaction
Although Co...

Method used

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  • Preparation method and application of high-temperature composite phase change regenerative oxygen carrier of iron lanthanum oxide-(copper-aluminum@alumina)
  • Preparation method and application of high-temperature composite phase change regenerative oxygen carrier of iron lanthanum oxide-(copper-aluminum@alumina)
  • Preparation method and application of high-temperature composite phase change regenerative oxygen carrier of iron lanthanum oxide-(copper-aluminum@alumina)

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Experimental program
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Effect test

Embodiment 1

[0040] Embodiment 1: A kind of core-shell structure LaFeO 3 -(Cu-Al@Al 2 o 3 ) The preparation method of high temperature composite phase change heat storage oxygen carrier, the specific steps are:

[0041] (1) Copper-aluminum alloy powder, Co(NO 3 ) 2 , NH 4 F is added to water to prepare copper-aluminum alloy powder turbid liquid, Co(NO 3 ) 2 solution and NH 4 F solution; where copper aluminum alloy powder, Co(NO 3 ) 2 , NH 4 The mass ratio of F is 10:2:3, the concentration of copper-aluminum alloy powder in the turbid solution of copper-aluminum alloy powder is 30g / L, Co(NO 3 ) 2 Co(NO 3 ) 2 The concentration is 0.16mol / L, NH 4 NH in F solution 4 The concentration of F is 0.2mol / L;

[0042] (2) Put the copper-aluminum alloy powder turbid solution in step (1) in an ultrasonic wave with a power of 70W and perform ultrasonic treatment for 10 minutes to obtain a copper-aluminum alloy powder suspension;

[0043] (3) Add gelatin to the Co(NO 3 ) 2 solution, in ...

Embodiment 2

[0052] Embodiment 2: A kind of core-shell structure LaFeO 3 -(Cu-Al@Al 2 o 3 ) The preparation method of high temperature composite phase change heat storage oxygen carrier, the specific steps are:

[0053] (1) Copper-aluminum powder, Co(NO 3 ) 2 , NH 4 F is added to water to prepare copper-aluminum powder turbid liquid, Co(NO 3 ) 2 solution and NH 4 F solution; where copper aluminum alloy powder, Co(NO 3 ) 2 , NH 4 The mass ratio of F is 5:1:2, the concentration of copper-aluminum alloy powder in the turbid solution of copper-aluminum alloy powder is 10g / L, Co(NO 3 ) 2 Co(NO 3 ) 2 The concentration is 0.05mol / L, NH 4 NH in F solution 4 The concentration of F is 0.1mol / L;

[0054] (2) Place the copper-aluminum powder turbid solution in step (1) in an ultrasonic wave with a power of 40W for 5 minutes to obtain a copper-aluminum powder suspension;

[0055] (3) Add gelatin to the Co(NO 3 ) 2 solution, in which gelatin and Co(NO 3 ) 2 The solid-to-liquid ratio...

Embodiment 3

[0064] Embodiment 3: A kind of core-shell structure LaFeO 3 -(Cu-Al@Al 2 o 3 ) The preparation method of high temperature composite phase change heat storage oxygen carrier, the specific steps are:

[0065] (1) Copper-aluminum powder, Co(NO 3 ) 2 , NH 4 F is added to water to prepare copper-aluminum powder turbid liquid, Co(NO 3 ) 2 solution and NH 4 F solution; where aluminum alloy powder, Co(NO 3 ) 2 , NH 4 The mass ratio of F is 20:3:5, the concentration of copper-aluminum alloy powder in the turbid solution of copper-aluminum alloy powder is 50g / L, Co(NO 3 ) 2 Co(NO 3 ) 2 The concentration is 0.2mol / L, NH 4 NH in F solution 4 The concentration of F is 0.3mol / L;

[0066] (2) Place the copper-aluminum powder turbid solution in step (1) in an ultrasonic wave with a power of 80W for 30 minutes to obtain a copper-aluminum powder suspension;

[0067] (3) Add gelatin to the Co(NO 3 ) 2 solution, in which gelatin and Co(NO 3 ) 2 The solid-to-liquid ratio g:L o...

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Abstract

The invention relates to a preparation method and application of high-temperature composite phase change regenerative oxygen carrier of iron lanthanum oxide-(copper-aluminum@alumina), and belongs to the technical field of high-temperature composite regenerative oxygen carriers. Co-precipitation is utilized herein; a composite phase change regenerative material with core-shell structure is added toa lanthanum salt-iron salt mixed liquid; reacting is allowed by adjusting solution pH with ammonia water; high temperature roasting is performed to obtain core-shell LaFeO3-(Cu-Al@Al2O3) regenerativeoxygen carrier. The core-shell LaFeO3-(Cu-Al@Al2O3) high-temperature composite phase change regenerative oxygen carrier comprises core phase change regenerative material copper-aluminum alloy, innerAl2O3-CoO, and shell LaFeO3 oxygen carrier; multiple shells are combined such that the regenerative oxygen carrier has more stable structure; the shell covering layer is more compact, so that copper-aluminum leakage from the core in molten state can be effectively prevented. Core copper-aluminum alloy phase change heat also provides continuously controllable temperature control for chemical-chainhydrogen production reaction, so that hydrogen production by reaction is continuously stable. In addition, LaFeO3 in the composite phase change regenerative oxygen carrier has efficient and stable catalytic activity and is reusable.

Description

technical field [0001] The invention relates to a core-shell structure LaFeO 3 -(Cu-Al@Al 2 o 3 ) The preparation method and application of high-temperature composite phase-change thermal storage oxygen carrier belong to the technical field of high-temperature composite phase-change thermal storage oxygen carrier. Background technique [0002] As the most important energy consumed in the world at present, traditional fossil energy not only obtains energy, but also produces a large amount of CO in the process of utilization. 2 , leading to the greenhouse effect. Hydrogen has clear advantages over conventional fossil fuels. The calorific value of hydrogen is high, and the product of hydrogen combustion is only water, which does not produce greenhouse gases. Therefore, hydrogen is a clean and efficient fuel with great application prospects. Although there are many methods for traditional hydrogen production, the chemical chain hydrogen production technology uses fuel and a...

Claims

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Application Information

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IPC IPC(8): B01J23/83C09K5/06
CPCB01J23/002B01J23/83B01J35/0073B01J2523/00C09K5/06B01J2523/31B01J2523/3706B01J2523/17B01J2523/842
Inventor 李孔斋张凌田孟爽陈艳鹏隆颜徽
Owner KUNMING UNIV OF SCI & TECH
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