A kind of perovskite structure oxide modified ilmenite ore oxygen carrier and preparation method thereof

A technology of perovskite structure and ilmenite ore, which is applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of expensive Ni-based oxygen carriers, Poor reactivity, low reactivity and other problems, to achieve the effect of improving reactivity and oxygen load capacity, reducing production cost, and good reactivity

Active Publication Date: 2022-06-24
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current oxygen carriers mainly include Fe, Ni, Co, Cu, Mn and other metal oxides and CaSO 4 Alkaline earth metal compounds such as Ni-based oxygen carriers have the characteristics of high activity, high temperature resistance and large oxygen carrying capacity, but Ni-based oxygen carriers are relatively expensive
Fe-based oxygen carrier has the advantages of cheap price, high melting point and not easy to sinter, but the oxygen carrying capacity is relatively low
Cu-based oxygen carrier has the characteristics of high reactivity and large oxygen carrying capacity, but its melting point is low, and it is prone to agglomeration and sintering at high temperature, so its use is limited.
Calcium-based oxygen carriers have the advantages of cheap price and high oxygen loading rate, but their reactivity is low and there is a problem of sulfur loss
Ilmenite is rich in FeO and TiO 2 , and it is cheap and easy to obtain, so it has attracted widespread attention, but it also has the problems of low oxygen loading rate and poor reactivity

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  • A kind of perovskite structure oxide modified ilmenite ore oxygen carrier and preparation method thereof

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preparation example Construction

[0033] The application provides a method for preparing an ilmenite ore oxygen carrier modified by a perovskite structure oxide, which includes: combining the reduction product of ilmenite ore with the general formula A 1～x B x o 3 A mixture of perovskite-structured oxide precursors was fired. Specifically include the following steps:

[0034] S1. Preparation of reduction products of ilmenite ore.

[0035] The reduction product of the ilmenite ore is obtained by subjecting the mixture of ilmenite ore and carbonaceous material to microwave heating treatment.

[0036] Specifically, the ilmenite ore and the carbonaceous material are mixed according to a weight ratio of 1:0.1-0.2 to obtain a mixture, the mixture is subjected to tableting treatment, and then dried at 90-125°C for 16-24 hours, followed by microwave heating to 550-700°C, keep for 10-30 minutes, and cool to obtain the reduced product of ilmenite ore.

[0037] Among them, the particle size of the ilmenite ore is 10...

Embodiment 1

[0052] (1) Ilmenite ore pretreatment

[0053] ①Weigh 20g of ilmenite ore with a particle size of 100-300μm after grinding and 2.0g of charcoal with a particle size of 50μm, put them in container 1, and mix them evenly; ②Compress the mixture in step ①, put it in a drying oven, and dry at 100°C 16 hours, then microwave heating to 580° C., keep for 20 minutes, and cool to obtain pretreated ilmenite ore.

[0054] (2)Ni 0.4 Cu 0.6 o 3 Preparation of Oxide Precursors with Perovskite Structure

[0055] ①Weigh 8.5gNi(NO 3 ) 3 ·6H 2 O and 13.2gCu(NO 3 ) 2 ·6H 2 O put in beaker 1, add 50g deionized water, stir to dissolve completely; ②Weigh 10.5g citric acid and 3.4g ethylene glycol into beaker 1 in turn, stir, citric acid / ethylene glycol / metal ion The molar ratio in the aqueous solution is 2.0:2.0:1.0, and stir for 30 minutes after the addition. The resulting mixed aqueous solution was aged at room temperature for 12 h to obtain Ni 0.4 Cu 0.6 o 3 Perovskite Structure Oxid...

Embodiment 2

[0059] (1) Ilmenite ore pretreatment

[0060] ①Weigh 20g of ilmenite ore with a particle size of 100-300μm after grinding and 3.0g of charcoal with a particle size of 50μm, put them in container 1, and mix them evenly; ②Compress the mixture in step ①, put it in a drying oven, and dry at 110°C 18 hours, then microwave heating to 650° C., keep for 20 minutes, and cool to obtain pretreated ilmenite ore.

[0061] (2)Ni 0.5 Cu 0.5 o 3 Preparation of Oxide Precursors with Perovskite Structure

[0062] ①Weigh 10.7gNi(NO 3 ) 3 ·6H 2 O and 7.7 g CuCl 2 4H 2 O put in beaker 1, add 50g deionized water, stir to dissolve completely; ②Weigh 10.5g citric acid and 3.4g ethylene glycol into beaker 1 in turn, stir, citric acid / ethylene glycol / metal ion The molar ratio in the aqueous solution is 2.0:2.0:1.0, and stir for 30 minutes after the addition. The resulting mixed aqueous solution was aged at room temperature for 12 h to obtain Ni 0.5 Cu 0.5 o 3 Perovskite Structure Oxide Pre...

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Abstract

The invention discloses an ilmenite ore oxygen carrier modified by a perovskite structure oxide and a preparation method thereof, and relates to the technical field of chemical chain combustion. The preparation method comprises combining the reduction product of ilmenite ore with the general formula A 1～x B x o 3 The mixture of the perovskite structure oxide precursor is roasted, the preparation method of the ilmenite ore oxygen carrier modified by the perovskite structure oxide provided by the application is by reducing the ilmenite ore, and then the titanium Roasting the mixture of the iron ore reduction product and the perovskite structure oxide precursor solution can fully load the perovskite structure oxide on the reduction product of ilmenite ore, which not only improves the oxygen carrier reactivity and Oxygen carrying capacity can also reduce the cost of oxygen carrier preparation. The obtained perovskite structure oxide-modified ilmenite ore oxygen carrier has high oxygen-carrying rate and good reactivity.

Description

technical field [0001] The invention relates to the technical field of chemical looping combustion, in particular to an ilmenite ore oxygen carrier modified by a perovskite structure oxide and a preparation method thereof. Background technique [0002] Chemical looping combustion is an efficient, clean and economical new flameless combustion technology. Its technical core is to transfer the oxygen in the air to the fuel in the form of lattice oxygen through an oxygen carrier, so as to realize the combustion reaction of the fuel in an air-free atmosphere, and has the function of enriching CO 2 and low NO x The characteristics of pollutant emissions have received extensive attention from the academic community. The current oxygen carriers mainly include Fe, Ni, Co, Cu, Mn and other metal oxides and CaSO 4 Alkaline earth metal compounds such as Ni-based oxygen carriers have the characteristics of high activity, high temperature resistance and large oxygen carrying capacity, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/70
CPCC10L10/00
Inventor 齐文义郝代军陈千惠李小苗黄延召左世伟孟学峰邓向军邹颖
Owner CHINA PETROLEUM & CHEM CORP
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