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Preparation method of zinc-iron composite oxide loaded activated carbon desulfurizer

A composite oxide and activated carbon technology, which is applied in chemical instruments and methods, separation methods, and other chemical processes, can solve the problems of desulfurization desulfurization performance of desulfurizers, reduction of sulfur capacity, uneven loading of active components, etc. Capacity and desulfurization accuracy, improve load uniformity, and prevent equipment corrosion

Active Publication Date: 2021-02-12
HUNAN HUANDA ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In recent years, some loaded desulfurizers have also appeared, such as a kind of activated carbon desulfurizer loaded with copper oxide disclosed in CN105903324A and its preparation process and a kind of activated carbon desulfurized agent loaded with magnesium oxide disclosed in CN107583636A and its preparation method, but existing Due to the insufficient preparation process and the limitation of production conditions of the supported activated carbon desulfurizer, the active components are loaded unevenly in the carrier activated carbon and the dispersion is not good, resulting in low utilization of the active components and the penetration of the desulfurizer. The time is shortened, the sulfur capacity is reduced, and the desulfurization accuracy cannot meet the standard stably
In addition, the uneven distribution of active components is also detrimental to the anti-sintering performance of the desulfurizer, and the active components are prone to agglomeration during the reaction at high temperature, which greatly reduces the desulfurization performance of the desulfurizer

Method used

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  • Preparation method of zinc-iron composite oxide loaded activated carbon desulfurizer
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  • Preparation method of zinc-iron composite oxide loaded activated carbon desulfurizer

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Experimental program
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Effect test

Embodiment 1

[0052] A preparation method of zinc-iron composite oxide loaded activated carbon desulfurizer, the steps are as follows:

[0053] S1. Take 3000g of φ4mm activated carbon, and measure in the laboratory that its water content is 0.2wt%, its bulk density is 0.45kg / L, its pore volume is 0.51mL / g, and its adsorption saturation is 90%;

[0054] S2, get S1 activated carbon 500g, its water content is 0.2 wt%; Get S1 activated carbon 500g, carry out vacuum treatment (vacuum negative pressure is-0.2MPa, pumping time 15min), make the water content of activated carbon be controlled at 0.1wt%; Take 500g of S1 activated carbon for 0.2h -1 Water vapor is passed into the activated carbon at a space velocity of 2.5h to make the water content reach 0.3wt%; take 500g of S1 activated carbon, -1 Water vapor is passed into the activated carbon at a space velocity of 2.5h to make the water content reach 0.4wt%; take 500g of S1 activated carbon, 1 Water vapor is passed into the activated carbon at ...

Embodiment 2

[0066] A preparation method of zinc-iron composite oxide loaded activated carbon desulfurizer, the steps are as follows:

[0067] S1. Take 3000g of φ4mm activated carbon, and measure in the laboratory that its water content is 0.2wt%, its bulk density is 0.45kg / L, its pore volume is 0.51mL / g, and its adsorption saturation is 90%;

[0068] S2, with 0.4h -1 The space velocity is passed into the S1 activated carbon for 2.5h to make the water content reach 0.4wt%, and then the activated carbon is divided into 6 parts, each 500g;

[0069] S3, dissolving zinc sulfate, iron sulfate and urea into deionized water to form a mixed solution of zinc and iron salts. In the solution, the concentration of zinc ions is 0.01mol / l, the concentration of iron ions is 0.01mol / l, and the excess of urea is 2 times;

[0070] S4. Pour the mixed solution of zinc-iron salt obtained in S3 into the drum machine with 6 parts of 500g of activated carbon in S2, the mass ratio of zinc-iron salt solution to a...

Embodiment 3

[0079] A preparation method of zinc-iron composite oxide loaded activated carbon desulfurizer, the steps are as follows:

[0080] S1. Take 4000g of φ4mm activated carbon, and measure in the laboratory that its water content is 0.2wt%, its bulk density is 0.45kg / L, its pore volume is 0.51mL / g, and its adsorption saturation is 90%;

[0081] S2, with 0.4h -1 The space velocity is passed into the S1 activated carbon for 2.5h to make the water content reach 0.4wt%, and then the activated carbon is divided into 8 parts, each 500g;

[0082] S3, dissolving zinc sulfate, iron sulfate and urea into deionized water to form a mixed solution of zinc and iron salts. In the solution, the concentration of zinc ions is 0.01mol / l, the concentration of iron ions is 0.01mol / l, and the excess of urea is 2 times;

[0083] S4, the mixed solution of the zinc-iron salt obtained in S3 is poured into the tumbler with the gac of 8 parts of 500g in S2 respectively, and the zinc-iron salt solution

[00...

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Abstract

The invention relates to a preparation method of a zinc-iron composite oxide loaded activated carbon desulfurizer, which comprises the following steps: impregnating activated carbon with the water content of 0.1-0.5 wt% in a zinc-iron mixed solution at 60-80 DEG C, and controlling the impregnation time according to the bulk density of the activated carbon; drying the impregnated activated carbon,and controlling the drying rate according to the adsorption saturation of the activated carbon during the period; and roasting the dried activated carbon at 500-700 DEG C for 2-4 hours to obtain the finished product of the zinc-iron composite oxide loaded activated carbon desulfurizer. By improving and innovating the preparation process, the loading uniformity and dispersity of the active components on the carrier are greatly improved, and the sulfur capacity and desulfurization precision of the loaded activated carbon desulfurizer are effectively improved, so that hydrogen sulfide in the chemical production process is efficiently and stably removed, equipment corrosion is prevented, and the environment is protected.

Description

technical field [0001] The invention relates to a preparation method of a zinc-iron composite oxide-loaded activated carbon desulfurizer, belonging to the technical field of gas purification. Background technique [0002] With the continuous development and progress of my country's economy and society, ecological environment protection has gradually become an important issue of concern to people. h 2 S is a poisonous and foul-smelling gas, which is extremely harmful and comes from industrial production activities such as petrochemical and coal chemical industries. h 2 S can cause metal catalysts in industrial production to lose their catalytic ability and corrode equipment. When H 2 When the S content is relatively high, it can be life-threatening (Peng Ben, Yang Lei, Peng Xiaohu, Zhong Wu, Qiu Shuliang, Liao Yian, Jiang Bo, Li Si, Progress in Regeneration Process of Waste ZnO Desulfurizer, Guangdong Chemical Industry, 2019, 46(22): 72- 73). Currently, removing H 2 Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/02
CPCB01J20/20B01J20/06B01D53/02B01D2257/204Y02A50/20
Inventor 彭奔彭晓虎邱树梁廖怡安钟武蒋波
Owner HUNAN HUANDA ENVIRONMENTAL PROTECTION
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