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Redox preparation process of an oxygen carrier for a chemical looping process

A technology of oxygen carrier and chemical chain, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of oxygen carrier materials, energy density, and expensive

Pending Publication Date: 2021-11-09
威妥有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] A disadvantage of the methods described in WO 2014 / 155116 and WO 2018 / 115344 is the risk of particle aggregation of the oxygen carrier material, which has an adverse effect on the impregnation of the particles with redox materials
Furthermore, these methods involve two calcination steps, which makes the method energy intensive and thus expensive

Method used

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  • Redox preparation process of an oxygen carrier for a chemical looping process
  • Redox preparation process of an oxygen carrier for a chemical looping process
  • Redox preparation process of an oxygen carrier for a chemical looping process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] by containing 20 vol% H at a temperature of 850°C 2 The oxygen carrier material was reduced overnight in He flow (100 seem) to obtain pre-reduced oxygen carrier material.

[0109] 0.76g CuCl 2 .2H 2 O dissolved in 1.1ml H 2 O, thus obtaining 4.05M Cu 2+ solution. 0.050 g of this solution was contacted with 0.5072 g of pre-reduced oxygen carrier (OC) material. In the case of a quantitative reaction, 0.013 g of Cu could be deposited. The observed final Fe:Cu molar ratio was 36.1:1.

Embodiment 2

[0111] 0.0241g CuCl 2 .2H 2 O dissolved in 0.4993g H 2 O, thus obtaining 0.283M Cu 2+ solution.

[0112] 0.30 g of this solution was contacted with 1 g of pre-reduced oxygen carrier material obtained by heating at 900° C. 2 Obtained by overnight reduction in He (100 sccm). 0.0054 g Cu could be deposited in case of quantitative reaction. The Fe:Cu molar ratio in the final product obtained was observed to be 87:1.

Embodiment 3

[0114] 0.4614g CuCl 2 .2H 2 O dissolved in 0.5058g H 2 O, thus obtaining 5.35M in H 2 solution in O. 0.30 g of this solution was contacted overnight with 1 g of pre-reduced oxygen carrier material produced by heating at 900° C. 2 obtained by reducing the oxygen carrier material in the presence of flowing He (100 sccm).

[0115] In case of quantitative reaction, 0.102 g Cu can be deposited on the oxygen carrier material. A final Fe:Cu molar ratio of 3.7:1 was obtained

[0116] SEM & Optical Microscopy

[0117] On polished cross-sections of embedded particles inside epoxy resin, the concentration of oxygen carriers was studied by optical microscopy (SteREO imager, ZEISS) and by scanning electron microscopy using a FEI NOVA Nanosem 450 with an energy dispersive spectrometer (EDS) system. microstructure.

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Abstract

The invention is directed to a process for the preparation of an oxygen carrier for a chemical looping process comprising: (a) providing a material A comprising at least one first transition metal and / or an oxide of the at least one first transition metal, wherein the at least one first transition metal is selected from one or more of chemical element groups 6-11 of the Periodic System, wherein the at least one first transition metal and / or oxide of at least one first transition metal is optionally supported on one or more support materials, (b) subjecting material A to a reaction with H2 to cause at least partial reduction of the at least one first transition metal and / or at least one first transition metal oxide to form a reduced material B, (c) treating reduced material B with a solution of a salt of at least one second transition metal, wherein the at least one second transition metal is selected such that it has a standard reduction potential that is larger than a standard reduction potential of the first transition metal, wherein a portion of the at least one first transition metal in the reduced material B is replaced by the at least one second transition metal, wherein a molar ratio of the at least one first transition metal with respect to the at least one second transition metal in the reduced material B ranges between 2:1 and 100:1, and (d) washing and optionally drying the thus obtained oxygen carrier. The invention also relates to an oxygen carrier obtained with this method and to a method for regeneration of the oxygen carrier using steam.

Description

technical field [0001] The present invention relates to a method for preparing oxygen carriers for chemical chain processes. Background technique [0002] Carbon dioxide emissions from combustion and other chemical processes severely impact the environment. Therefore, alternative methods have been developed in which these CO 2 emission. In current and emerging CO 2 Among capture technologies, chemical looping processes are often used as 2 Particularly promising approaches for capture and energy generation are mentioned. [0003] In general, chemical chaining is used to refer to cyclic processes using solid materials that cycle the oxygen required to convert fuels. Such solid materials are therefore called "oxygen carriers" and traditionally consist of metal oxide particles. In order to close the chemical chain, the oxygen-depleted solid oxygen carrier must be reoxidized (regenerated) before a new cycle can start. Depending on the focus of the chemical looping process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J23/889B01J23/94B01J38/06B01J37/02B01J37/18C01B3/40C01B3/38B01J23/76B01J23/89B01J23/78B01J37/00B01J37/08B01J35/00
CPCB01J23/745B01J23/8892B01J23/94B01J38/06B01J37/18B01J37/0201B01J37/0203B01J37/0213B01J37/0018B01J37/088B01J37/024B01J37/0045B01J37/009B01J35/002B01J23/76B01J23/89B01J23/78C01B3/36C01B2203/025Y02P20/584
Inventor 约伦·德沃斯玛丽克·雅各布斯安·维伯克默斯帕斯卡尔·范德沃特伊莎贝尔·范德里舍
Owner 威妥有限公司
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