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Composite metal oxide desulphurization agent and preparation method thereof

A technology of composite metal and desulfurizer, applied in chemical instruments and methods, separation methods, combustible gas purification, etc., can solve the problems of unstable oxygen content, carrier absorption, and high tail gas content, and achieves improved reaction efficiency, mild reaction conditions, The effect of improving the removal accuracy

Inactive Publication Date: 2019-01-01
WUHAN TEXTILE UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages: high COS tail gas content, incomplete removal
Disadvantages: Due to the catalytic mechanism, a certain amount of oxygen needs to be added, which brings difficulty to the operation, and due to the unstable oxygen content, the experiment repeatability is poor and the effect is unstable
[0011] (1) The existing liquid-phase desulfurization method requires a certain amount of water vapor and some organic solvents in the raw material gas, which will make the catalyst use process more complicated and increase the cost
[0012] (2) The existing desulfurizing agent preparation technology is to obtain the desulfurizing agent by precipitating and drying the active component and mixing it with the auxiliary agent. The defect of this method is that the auxiliary agent and the active group are mechanically mixed, and some raw materials are mixed during the mixing process. It is still in the granular state and the dispersion is not complete; therefore, the raw materials are not mixed uniformly during the mixing process, and the dispersion of the active components is not high, which ultimately affects the desulfurization effect
[0013] (3) In the existing desulfurizer preparation technology, the impregnation method is also used to prepare the catalyst. The defect of this method is that the active components cannot fully reach the inner surface of the carrier during the impregnation process, and the active components with higher concentration will gather on the outer surface. , which affects the diffusion of active components to the inner surface, and the solution where the active components are located cannot be completely absorbed by the carrier, which will cause a lot of waste of materials
[0014] (4) Existing copper-based desulfurizers use copper and aluminum to make oxides by co-precipitation, which is more effective in removing hydrogen sulfide, and the removal accuracy can reach 5ppb, but the effect in removing COS is not good obvious

Method used

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  • Composite metal oxide desulphurization agent and preparation method thereof
  • Composite metal oxide desulphurization agent and preparation method thereof
  • Composite metal oxide desulphurization agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] 1 Weigh 0.08mol of AlCl 3 .6H 2 O, 0.04mol of Cu(NO 3 ) 2 , 0.04mol MnCl 2 configured as Cu(NO 3 ) 2 The co-solution A with a mass fraction of 10% was poured into a 500mL three-neck flask for later use.

[0050] 2. Weigh again 0.13 mol of diethylenetriamine (EDTA), and configure it into 10% lye B for later use.

[0051] 3. Will be loaded with Cu(NO 3 ) 2 Place the three-necked flask of co-solution A of iso-salt in a water bath at 70°C, start stirring at 400r / min, add lye B to co-solution A drop by drop with a constant pressure dropping funnel, and the dropping speed is 1 drop / S, The dropping time is controlled at 1.5h, and the stirring is continued for 0.5h after the dropping, and the pH is controlled to be 10;

[0052] 4. After the dropwise addition was completed, continue to keep warm and stir for 1 hour, then stop the reaction, and place the obtained precipitate at the reaction temperature to age for 18 hours.

[0053] 5. After the aging is completed, add 1...

Embodiment 2

[0058] 1. Weigh 0.08mol of AlCl 3 .6H 2 O, 0.04mol of Cu(NO 3 ) 2 , 0.04mol ZnCl 2 configured as Cu(NO 3 ) 2 The co-solution A with a mass fraction of 10% was poured into a 500mL three-neck flask for later use.

[0059] 2. Weigh again 0.13mol DEA, and configure it into lye B with a mass fraction of 10%, and set it aside.

[0060] 3. Will be loaded with Cu(NO 3 ) 2 Place the three-neck flask of co-solution A of iso-salt in a water bath at 20°C, start stirring at 600r / min, add lye B to co-solution A drop by drop with a constant pressure dropping funnel, and the dropping speed is 3 drops / S, The dropping time is controlled at 1h, and the stirring is continued for 1h after the dropping is completed, and the pH is controlled to be 8;

[0061] 4. After the dropwise addition was completed, continue to heat and stir for 1 hour, then stop the reaction, and place the obtained precipitate at the reaction temperature to age for 36 hours.

[0062] 5. After the aging is completed, ...

Embodiment 3

[0067] 1. Weigh 0.08mol of AlCl 3 .6H 2 O, 0.04mol of Cu(NO 3 ) 2 , 0.04mol FeCl 3 configured as Cu(NO 3 ) 2 The co-solution A with a mass fraction of 10% was poured into a 500mL three-neck flask for later use.

[0068] 2. Weigh again 0.146 mol of diethylenetriamine (EDTA), configure it into lye B with a mass fraction of 10%, and set aside.

[0069] 3. Will be loaded with Cu(NO 3 ) 2 Place the three-necked flask of co-solution A of iso-salt in a water bath at 70°C, start stirring at 200r / min, add lye B to co-solution A drop by drop with a constant pressure dropping funnel, and the dropping speed is 3 drops / S, The dropping time is controlled at 1.5h, and the stirring is continued for 0.5h after the dropping, and the pH is controlled to be 9;

[0070] 4. After the dropwise addition was completed, continue to heat and stir for 1 hour, then stop the reaction, and place the obtained precipitate at the reaction temperature to age for 36 hours.

[0071]5. After the aging is...

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Abstract

The invention discloses a composite metal oxide desulphurization agent and a preparation method thereof, which belongs to the technical field of environmental protection and chemical industry. The desulphurization agent is prepared by precipitating an active component and a carrier by virtue of a precipitating agent in a kneading method, wherein the active component is classified into a main active component and a third active component, the main active component is Cu<2+>, the third active component is Mn<2+>, Zn<2+>, Ca<2+>, Fe<3+>, the carrier is Al<3+>, and the precipitating agent is organic amine. By mixing the multi-component metal, the utilization rate is maximized, the active components are sufficiently dispersed in pores of the carrier with a given specific surface area and a porous structure by adopting a co-precipitation method, so that the active components can be sufficiently mixed with sulfide, the utilization rate is greatly improved, and the desulphurization precision can be improved by utilizing the doping of different metal oxides.

Description

technical field [0001] The invention belongs to the technical fields of environmental protection and chemical engineering, and in particular relates to a composite metal oxide desulfurizer and a preparation method thereof. Background technique [0002] my country is a country rich in coal and lacking in oil and gas. Under the situation of increasing energy security and environmental protection requirements, improving coal utilization efficiency and strictly controlling environmental pollution is an important research topic at present. Therefore, the development of coal liquefaction products and clean fuel utilization technology is an inevitable choice to solve the shortage of petroleum energy in my country. The indirect coal liquefaction technology is to convert the gasification gas generated by coal gasification furnace into synthesis gas, and use synthesis gas as the basic raw material. It is converted into hydrocarbons by Fischer-Tropsch synthesis, and liquid fuels and var...

Claims

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Application Information

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IPC IPC(8): B01D53/81B01D53/52B01D53/48C10K1/20
CPCB01D53/81B01D53/485B01D53/52B01D2251/602B01D2257/308C10K1/20
Inventor 夏明桂何秋瑾夏王哲王彩凤夏广曲瑞娜方派周玉清王琦
Owner WUHAN TEXTILE UNIV
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