Needle-like nano iron-based double-metal hydroxide and application thereof

A hydroxide, nano-iron technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, iron compound, nickel compound, etc., to achieve the effect of reducing pyrolysis temperature, improving pyrolysis efficiency, and enriching active sites

Active Publication Date: 2022-05-13
NORTHEAST GASOLINEEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, so far no researchers have applied LDH to the field of pyrolysis catalytic oil shale mining technology

Method used

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  • Needle-like nano iron-based double-metal hydroxide and application thereof
  • Needle-like nano iron-based double-metal hydroxide and application thereof
  • Needle-like nano iron-based double-metal hydroxide and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0037] The preparation method includes:

[0038] (1) Soluble ferric salt, soluble divalent metal salt (one of nickel salt, manganese salt or cobalt salt) and urea are dissolved in ultrapure water to form a mixed solution. Wherein, the mass ratio of soluble ferric salt to soluble divalent metal salt is 1:(3-6), and the mass ratio of urea to metal salt is (1-3):1.

[0039] (2) Stir the mixed solution in a reactor at 100-160°C (for example, 100°C, 110°C, 120°C, 130°C, 140°C, 150°C, 160°C, etc.) Wash and centrifuge, disperse and dry with ethanol, and protect with nitrogen to obtain needle-shaped nanometer iron-based double metal hydroxide.

[0040] In this preparation method, the ratio of iron salt to divalent metal salt and the ratio of the sum of the two to urea are selected according to the structural characteristics and unit cell parameter characteristics of the above-mentioned needle-like nano-iron-based double metal hydroxide, and urea can effectively control the divalent m...

Embodiment 1

[0058] (1) Dissolve 0.7131g nickel dichloride hexahydrate, 0.1442g ferric chloride hexahydrate and 0.54g urea into ultrapure water, stir and react in a reactor at 160°C for 10h, the product is washed and centrifuged with distilled water, dispersed with ethanol and Drying, nitrogen protection throughout, to obtain needle-shaped nano-nickel-iron double metal hydroxide. Nickel hydroxide by-product present in the product.

[0059] The average length, diameter, and unit cell parameters of the needle-like nano-nickel-iron double hydroxide in this example were detected, and the results are shown in Table 1.

[0060] The transmission electron microscope figure, energy dispersive X-ray figure, X-ray diffraction figure and Fourier transform infrared spectrum figure of the acicular nano-nickel-iron double metal hydroxide of the present embodiment were taken, respectively as figure 2 , image 3 , Figure 4 and Figure 5 shown.

[0061] figure 2 It is a transmission electron micros...

Embodiment 2

[0068] (1) Dissolve 0.595g of cobalt dichloride, 0.1442g of ferric chloride hexahydrate and 0.46g of urea into ultrapure water, stir and react in a reactor at 160°C for 10 hours, wash and centrifuge the product with distilled water, disperse with ethanol and dry, The whole process is protected by nitrogen gas to obtain needle-shaped nanometer cobalt-iron double metal hydroxide.

[0069] (2) Evenly mix 10 grams of oil shale (TOC: 18.67%, HI: 651.18) with 0.5 grams of needle-shaped nano-cobalt-iron double metal hydroxide, place it in a closed reaction kettle at 300°C, and react for 90 minutes, The gas and liquid products were collected in situ, and the composition and distribution of the products were detected by gas chromatography. Solid organic matter was not detected.

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Abstract

Metal cations in a laminate of the acicular nano iron-based double-metal hydroxide are composed of Fe < 3 + > and a divalent metal cation selected from Ni < 2 + >, Mn < 2 + > and Co < 2 + >, and anions in an interlayer region of the acicular nano iron-based double-metal hydroxide are composed of OH <->, CO3 < 2-> and OCN <->. The invention also provides application of the needle-like nano-iron-based double-metal hydroxide in the catalytic oil shale pyrolysis process and an oil shale catalytic pyrolysis method adopting the needle-like nano-iron-based double-metal hydroxide as a catalyst. The needle-like nano iron-based bimetal hydroxide has the characteristics of rich active sites, high temperature resistance and stable structure. When the needle-like nano-iron-based bimetallic hydroxide is adopted to catalyze oil shale pyrolysis, the pyrolysis temperature can be reduced, controllable distribution of oil shale pyrolysis products is achieved, and the oil shale pyrolysis products are converted into medium and low carbon hydrocarbon organic matters.

Description

technical field [0001] The invention relates to an acicular nanometer iron-based double metal hydroxide and its application in the pyrolysis and catalysis process of oil shale, belonging to the technical field of in-situ thermal exploitation of oil shale. Background technique [0002] Oil shale is a kind of unconventional energy with abundant reserves, which can extract shale oil and related petrochemical products. The main organic matter (kerogen) in oil shale can be converted into natural petroleum-like organic matter and gas through pyrolysis or dry distillation, and its energy storage is huge. Therefore, the development and utilization of oil shale and the development of related science and technology have important significance and academic value. [0003] In-situ mining technology is one of the main ways to develop and utilize oil shale. Heat is injected into oil shale to thermally crack shale oil to generate pyrolysis oil and gas, which is then discharged to the grou...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01G51/00C01G49/00B82Y40/00B01J23/75B01J23/755B01J23/889C09K8/592C10B53/06C10B57/06C10G1/00
CPCC01G53/00C01G51/00C01G49/00B82Y40/00C10B53/06C10G1/00C10B57/06B01J23/755B01J23/75B01J23/8892C09K8/592C01P2004/10C01P2002/77C01P2004/04C01P2002/72C01P2002/82C01P2002/88
Inventor 施伟光李伟刘飞付晓飞刘向斌孙亮闫秀玲李本仙张健孙先达许承武魏建光柳波
Owner NORTHEAST GASOLINEEUM UNIV
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