ZnO / ZnFe2O4 desulfurization adsorbent with stable porous structure and preparation method of ZnO / ZnFe2O4 desulfurization adsorbent

Abstract

The invention relates to the technical field of novel environment-friendly materials, in particular to a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure and a preparation method of the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure, and the preparation method of the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure comprises the following steps: step 1, preparing a zinc-iron salt mixed solution; preparing an alkaline mixed solution; step 2, dropwise adding the alkaline mixed solution prepared in the step 1 into the zinc-iron salt mixed solution while stirring, and adjusting the pH value to 9-10; then carrying out a water bath reaction to obtain a zinc iron-double metal hydroxide; 3, the zinc iron-bimetal hydroxide prepared in the step 2 is subjected to high-temperature calcination, and the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure is obtained.The zinc iron-bimetal hydroxide (ZnFe-LDH) serves as a raw material, under the high-temperature calcination condition, the ZnFe-LDH is decomposed to generate ZnO and Fe2O3, then the ZnO and the Fe2O3 are further subjected to a solid-phase reaction to generate ZnFe2O4 (excessive ZnO), and the ZnO / ZnFe2O4 desulfurization adsorbent with the stable porous structure is obtained. And finally, the ZnO / ZnFe2O4 desulfurization composite adsorption material is prepared.

Description

Technical Field

[0001] The present invention relates to the technical field of environmentally friendly new materials, and in particular to a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure and a preparation method thereof. Background Art

[0002] With increasingly stringent environmental regulations and standards, the clean utilization of traditional fossil energy sources such as coal and oil is becoming increasingly important. It is worth noting that the sulfur impurities contained in energy sources such as coal and oil will inevitably produce sulfur-containing gases (such as H2S, SO2, etc.), which not only corrode equipment and affect downstream production processes, but also pollute the environment and endanger human health. Therefore, the deep removal of sulfur-containing gases is particularly important. Due to the strong bonding between metals and sulfur, metal oxides are widely used in the deep removal of H2S. Compared with other metal oxides, zinc oxide (ZnO) desulfurizer has a relatively low cost and has become a widely used type of desulfurizer. However, due to the influence of reaction kinetics, the room temperature desulfurization activity of zinc oxide is relatively low [Liu Zhilong, Yang Chao, Su Zhelin, Wang Yeshuang, Liang Meisheng, Fan Huiling. Main influencing factors and research progress of room temperature fine desulfurization performance of zinc oxide. Journal of China Coal Society, 2025, 50(3):1794-1801]. The pore structure is the channel for H2S to diffuse from the surface of the desulfurizer to the active site, which is the prerequisite for the desulfurization reaction. Therefore, pore structure regulation is an effective measure to improve the desulfurization performance of zinc oxide. Since micropores are easily blocked during the desulfurization process, they are not conducive to mass transfer during the desulfurization process. On the contrary, increasing the pore size structure is conducive to the diffusion of H2S molecules and the storage of products. A Chinese patent (patent number: ZL201811454490.7) proposes a room-temperature zinc oxide fine desulfurizer, preparation method, and application. Its technical solution is to prepare a zinc oxide composite nanomaterial using a sol-gel method. The mesopores are mainly mesopores, accounting for 90-94%, which is conducive to mass transfer during the desulfurization process. The adsorbent has an adsorption capacity of 80-130 mg / g for H2S. However, in this type of technical solution, the zinc oxide desulfurizer with a large amount of mesoporous structure suffers from key technical problems such as severe sintering of zinc oxide particles and collapse of the mesoporous structure during high-temperature regeneration (the decomposition temperature of ZnSO4 is generally above 600°C), resulting in a sharp drop in the activity of the zinc oxide desulfurizer and poor regeneration performance. Summary of the Invention

[0003] In order to solve the problems existing in the prior art, the present invention provides a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure and a preparation method thereof, the purpose of which is to solve the key technical problems such as sintering and mesoporous structure collapse in the high-temperature regeneration process of mesoporous zinc oxide in the prior art, so as to improve the regeneration cycle performance of the zinc oxide desulfurizer.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure comprises the following steps:

[0006] Step 1: dissolving a soluble zinc salt and a soluble iron salt in deionized water to prepare a zinc-iron salt mixed solution; dissolving an organic amine alkaline salt and a soluble silicate in deionized water to prepare an alkaline mixed solution;

[0007] Step 2: adding the alkaline mixed solution prepared in step 1 dropwise to the zinc-iron salt mixed solution while stirring, adjusting the pH value of the zinc-iron salt mixed solution system to 9-10 to obtain a suspension; then performing a water bath reaction, filtering and washing after completion until the pH value of the filtrate is 7.0-7.5, and drying and crushing the filter cake at a temperature of 60° C. to 70° C. to obtain a zinc-iron double metal hydroxide;

[0008] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at a temperature of 600° C. to 650° C. for 3 to 7 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

[0009] Preferably, in the zinc and iron salt mixed solution prepared in step 1, the molar concentration of the soluble zinc salt is higher than the molar concentration of the soluble iron salt.

[0010] Preferably, in the zinc and iron salt mixed solution prepared in step 1, the molar concentration of the soluble zinc salt is 1.2 to 2.4 mol / L; the molar concentration of the soluble iron salt is 0.3 to 0.6 mol / L.

[0011] Preferably, the soluble zinc salt described in step 1 is one of zinc chloride, zinc sulfate or zinc nitrate; the soluble iron salt described in step 1 is one of ferric chloride, ferric sulfate or ferric nitrate.

[0012] Preferably, in the alkaline mixed solution prepared in step 1, the molar concentration of the organic amine alkaline salt is 0.5 to 1.0 mol / L; and the molar concentration of the soluble silicate is 0.8 to 1.6 mol / L.

[0013] Preferably, the organic amine alkaline salt described in step 1 is one of tetraethylammonium bicarbonate, tetrapropylammonium bicarbonate or tetrabutylammonium bicarbonate; and the soluble silicate described in step 1 is one of sodium silicate or potassium silicate.

[0014] Preferably, in step 2, the temperature of the water bath reaction is 80° C. to 100° C., and the stirring time of the water bath reaction is 12 to 24 hours.

[0015] Preferably, a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure is prepared by the above-mentioned method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

[0016] Preferably, a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure is used in high-temperature desulfurization.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention uses a mixed solution of an organic amine alkaline salt and a soluble silicate as an alkaline regulator. In addition to reacting with a soluble zinc salt and an iron salt to form a zinc-iron double hydroxide, it also has the following three advantages: ① The organic amine alkaline salt decomposes under relatively low temperature conditions (referring to step 2 of the present invention) to produce a small amount of carbon dioxide gas, which can perform primary pore formation on the zinc-iron double hydroxide (ZnFe-LDH); ② The decomposition product of the organic amine alkaline salt decomposes under high temperature conditions (referring to step 3 of the present invention) to produce a large amount of ammonia, water vapor and other gases, which have an expansion effect on metal oxides such as ZnO and ZnFe2O4, thereby achieving the purpose of secondary pore formation; ③ The small amount of silica sol produced by the soluble silicate during the reaction process (pH = 9-10) acts as a binder during the high-temperature calcination process, which is conducive to the formation of a good interface between the two metal oxides ZnO and ZnFe2O4, thereby stabilizing their pore structure.

[0019] 2. The present invention uses zinc-iron double hydroxide (ZnFe-LDH) as raw material. Under high-temperature calcination conditions, ZnFe-LDH first decomposes to form ZnO and Fe2O3. ZnO and Fe2O3 then undergo a solid-phase reaction to form ZnFe2O4 (with an excess of ZnO), ultimately producing a ZnO / ZnFe2O4 desulfurization composite adsorption material. The spinel-type ZnFe2O4 exhibits excellent desulfurization performance and high-temperature resistance. The ZnFe2O4-ZnO composite, with its good interfacial bonding, not only provides a synergistic desulfurization function but also effectively compensates for the shortcomings of ZnO at high temperatures, such as sintering and pore structure collapse. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 XRD spectra of ZnFe-LDH prepared in step 2 of Example 4 of the present invention, ZnO / ZnFe2O4 prepared in step 3, and pure ZnO prepared in comparative example 3.

[0021] Figure 2 This is a transmission electron microscope (TEM) photograph of the ZnFe-LDH prepared in step 2 of Example 4 of the present invention.

[0022] Figure 3This is a TEM photograph of the ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure prepared in step 3 of Example 4 of the present invention.

[0023] Figure 4 This is the TEM photo of pure ZnO prepared in Comparative Example 3. DETAILED DESCRIPTION

[0024] The present invention will be further illustrated below by specific examples and comparative examples, but the present invention is not limited to the following examples. Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional reagents and can be purchased on the market or synthesized according to conventional methods in the art; the experimental methods, unless otherwise specified, are all conventional methods.

[0025] Example 1

[0026] Step 1, dissolving zinc chloride and ferric chloride in deionized water to prepare a zinc-iron salt mixed solution with a molar concentration of 1.2 mol / L zinc chloride and 0.45 mol / L ferric chloride; dissolving tetraethylammonium bicarbonate and sodium silicate in deionized water to prepare an alkaline mixed solution with a molar concentration of 0.5 mol / L tetraethylammonium bicarbonate and 0.8 mol / L sodium silicate;

[0027] Step 2: Take 1 L of the zinc-iron salt mixed solution prepared in step 1, add the alkaline mixed solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc-iron salt mixed solution system to 9 to obtain a suspension; then continue stirring and reacting in a water bath temperature of 80° C. for 24 hours, filter and wash until the pH value of the filtrate is 7.0, dry and crush at a temperature of 60° C. to obtain a zinc-iron double hydroxide;

[0028] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at 600° C. for 7 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

[0029] Example 2

[0030] Step 1, dissolving zinc sulfate and ferric sulfate in deionized water to prepare a zinc-iron salt mixed solution with a molar concentration of 2.4 mol / L zinc sulfate and 0.6 mol / L ferric sulfate; dissolving tetrapropylammonium bicarbonate and potassium silicate in deionized water to prepare an alkaline mixed solution with a molar concentration of 1.0 mol / L tetrapropylammonium bicarbonate and 1.6 mol / L potassium silicate;

[0031] Step 2: Take 1 L of the zinc-iron salt mixed solution prepared in step 1, add the alkaline mixed solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc-iron salt mixed solution system to 10 to obtain a suspension; then continue stirring and reacting in a water bath temperature of 100° C. for 12 hours, filter and wash until the pH value of the filtrate is 7.5, dry and crush at a temperature of 70° C. to obtain a zinc-iron double hydroxide;

[0032] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at 650° C. for 3 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

[0033] Example 3

[0034] Step 1, dissolving zinc nitrate and ferric nitrate in deionized water to prepare a zinc-iron salt mixed solution with a molar concentration of 1.8 mol / L zinc nitrate and 0.3 mol / L ferric nitrate; dissolving tetrabutylammonium bicarbonate and potassium silicate in deionized water to prepare an alkaline mixed solution with a molar concentration of 0.75 mol / L tetrabutylammonium bicarbonate and 1.2 mol / L potassium silicate;

[0035] Step 2: Take 1 L of the zinc-iron salt mixed solution prepared in step 1, add the alkaline mixed solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc-iron salt mixed solution system to 9.5 to obtain a suspension; then continue stirring and reacting in a water bath at a temperature of 90° C. for 18 hours, filter and wash until the pH value of the filtrate is 7.3, dry and crush at a temperature of 65° C. to obtain a zinc-iron double hydroxide;

[0036] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at a temperature of 625° C. for 5 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

[0037] Example 4

[0038] Step 1, dissolving zinc chloride and ferric chloride in deionized water to prepare a zinc-iron salt mixed solution with a molar concentration of 2.0 mol / L zinc chloride and 0.4 mol / L ferric chloride; dissolving tetrabutylammonium bicarbonate and sodium silicate in deionized water to prepare an alkaline mixed solution with a molar concentration of 0.6 mol / L tetrabutylammonium bicarbonate and 1.0 mol / L sodium silicate;

[0039] Step 2: Take 1 L of the zinc-iron salt mixed solution prepared in step 1, add the alkaline mixed solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc-iron salt mixed solution system to 10 to obtain a suspension; then continue stirring and reacting in a water bath at a temperature of 95° C. for 15 hours, filter and wash until the pH value of the filtrate is 7.5, dry and crush at a temperature of 60° C. to obtain a zinc-iron double hydroxide;

[0040] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at a temperature of 630° C. for 4 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

[0041] Comparative Example 1

[0042] In Comparative Example 1, the step of adding tetrabutylammonium bicarbonate in Example 4 was deleted, and other process conditions remained unchanged. The specific steps were as follows:

[0043] Step 1, dissolving zinc chloride and ferric chloride in deionized water to prepare a zinc-iron salt mixed solution with a molar concentration of 2.0 mol / L zinc chloride and 0.4 mol / L ferric chloride; dissolving sodium silicate in deionized water to prepare an alkaline sodium silicate solution with a molar concentration of 1.0 mol / L;

[0044] Step 2: Take 1 L of the zinc-iron salt mixed solution prepared in step 1, add the alkaline solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc-iron salt mixed solution system to 10 to obtain a suspension; then continue stirring and reacting in a water bath temperature of 95° C. for 15 hours, filter and wash until the pH value of the filtrate is 7.5, dry and crush at a temperature of 60° C. to obtain a zinc-iron double hydroxide;

[0045] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at 630° C. for 4 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent.

[0046] Comparative Example 2

[0047] In Comparative Example 2, the step of adding sodium silicate in Example 4 was deleted, and other process conditions remained unchanged. The specific steps were as follows:

[0048] Step 1, dissolving zinc chloride and ferric chloride in deionized water to prepare a zinc-iron salt mixed solution with a molar concentration of 2.0 mol / L zinc chloride and 0.4 mol / L ferric chloride; dissolving tetrabutylammonium bicarbonate in deionized water to prepare a tetrabutylammonium bicarbonate alkaline solution with a molar concentration of 0.6 mol / L;

[0049] Step 2: Take 1 L of the zinc-iron salt mixed solution prepared in step 1, add the alkaline solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc-iron salt mixed solution system to 10 to obtain a suspension; then continue stirring and reacting in a water bath temperature of 95° C. for 15 hours, filter and wash until the pH value of the filtrate is 7.5, dry and crush at a temperature of 60° C. to obtain a zinc-iron double hydroxide;

[0050] Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at 630° C. for 4 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent.

[0051] Comparative Example 3

[0052] In Comparative Example 3, the step of adding ferric chloride in Example 4 was deleted, and other process conditions remained unchanged. The specific steps were as follows:

[0053] Step 1, dissolving zinc chloride in deionized water to prepare a zinc chloride solution with a molar concentration of 2.0 mol / L; dissolving tetrabutylammonium bicarbonate and sodium silicate in deionized water to prepare an alkaline mixed solution with a molar concentration of 0.6 mol / L tetrabutylammonium bicarbonate and 1.0 mol / L sodium silicate;

[0054] Step 2: Take 1 L of the zinc salt solution prepared in step 1, add the alkaline mixed solution prepared in step 1 dropwise while stirring, and adjust the pH value of the zinc salt solution system to 10 to obtain a suspension; then continue stirring and reacting in a water bath temperature of 95° C. for 15 hours, filter and wash until the pH value of the filtrate is 7.5, dry and crush at a temperature of 60° C. to obtain a zinc hydroxide precursor;

[0055] Step 3: calcining the zinc hydroxide precursor obtained in step 2 at 630° C. for 4 hours to obtain a pure ZnO desulfurization adsorbent.

[0056] Microstructure analysis and characterization:

[0057] The ZnFe-LDH prepared in step 2 of Example 4, the ZnO / ZnFe2O4 prepared in step 3 and the pure ZnO prepared in comparative example 3 were tested for their XRD spectra. The results are shown in FIG. Figure 1 As can be seen from the figure, ZnFe-LDH can generate ZnO / ZnFe2O4 composite through solid phase reaction after high temperature calcination.

[0058] The ZnFe-LDH obtained in step 2 of Example 4 was tested and its TEM image was shown in the following figure. Figure 2 As can be seen from the figure, ZnFe-LDH presents a flake structure with a small amount of SiO2 particles deposited on the surface.

[0059] The ZnO / ZnFe2O4 obtained in step 3 of Example 4 was tested and its TEM image was shown in the following figure. Figure 3 As can be seen from the figure, ZnO / ZnFe2O4 exhibits a stable porous structure.

[0060] The pure ZnO obtained in Comparative Example 3 was tested by TEM images. Figure 4 As can be seen from the figure, in the absence of ZnFe2O4, pure ZnO does not show a porous structure under high temperature conditions. This is because high temperature calcination leads to the fusion of the porous ZnO.

[0061] The microstructural analysis and characterization of the above samples provide effective evidence for the beneficial effects of the present invention.

[0062] Performance evaluation:

[0063] Preparation of adsorbent molding: Take 100 grams of sample and add it to a kneader (NH-2 type, Guangzhou Huagong Optoelectronic Technology Co., Ltd.), then add 20 ml of 3% mass concentration of carboxymethyl cellulose solution and 20 ml of deionized water in sequence, and knead for 30 minutes; take out the sample and add it to a double-thread extruder (F-26 type, Guangzhou Huagong Optoelectronic Technology Co., Ltd.), extrude it into a strip adsorbent with a diameter of 1 mm at a speed of 80 r / min, dry it at 100°C, then place it in a muffle furnace and calcine it at 500°C for 2 hours, and cut it into particles.

[0064] Adsorbent Desulfurization Performance Test: The adsorbent samples of the present invention were tested for adsorption performance using hydrogen sulfide as a simulated gas. The adsorbent activity evaluation was conducted in an adsorption-desorption catalytic reactor (VDRT-3000, Quzhou Ward Instrument Co., Ltd.). 15 g of 5-10 mm strips of adsorbent were placed on quartz wool in a 30 mm inner diameter quartz tube. Hydrogen sulfide was used as the simulated gas and blown directly from a cylinder. The hydrogen sulfide inlet concentration was 200 ppm and the air velocity was 3000 h / min. -1 The outlet concentration of hydrogen sulfide was analyzed online using a GC-2014 gas chromatograph (Shimadzu, Japan). When the outlet concentration reached 20 ppm, the breakthrough time was recorded, as shown in Table 1. Longer breakthrough times indicate better desulfurization performance.

[0065] Table 1

[0066]

[0067] As can be seen from Table 1, the adsorbents prepared by the adsorbent samples of Examples 1-4 have a penetration time greater than 55 minutes. In Comparative Example 1, tetrabutylammonium bicarbonate was not added, resulting in a smaller pore size of the ZnO / ZnFe2O4 desulfurization adsorbent (no two pore expansion treatments were performed), and the desulfurization effect of the final product was average, inferior to that of Examples 1-4; in Comparative Example 2, sodium silicate was not added, and the prepared ZnO / ZnFe2O4 desulfurization adsorbent had a poor desulfurization effect at high temperatures. Since no silica sol was produced, there was no good interfacial bonding between ZnFe2O4 and ZnO, and the two could not play a synergistic desulfurization function; in Comparative Example 3, ferric chloride was not added, and desulfurization was ultimately carried out based on pure ZnO desulfurization adsorbent, and the desulfurization effect was average at high temperatures.

[0068] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure, characterized in that: The following steps are involved: Step 1: dissolving a soluble zinc salt and a soluble iron salt in deionized water to prepare a zinc-iron salt mixed solution; dissolving an organic amine alkaline salt and a soluble silicate in deionized water to prepare an alkaline mixed solution; Step 2: adding the alkaline mixed solution prepared in step 1 dropwise to the zinc-iron salt mixed solution while stirring, adjusting the pH value of the zinc-iron salt mixed solution system to 9-10 to obtain a suspension; then performing a water bath reaction, filtering and washing after completion until the pH value of the filtrate is 7.0-7.5, and drying and crushing the filter cake at a temperature of 60° C. to 70° C. to obtain a zinc-iron double metal hydroxide; Step 3: calcining the zinc-iron double hydroxide prepared in step 2 at a temperature of 600° C. to 650° C. for 3 to 7 hours to obtain a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure.

2. The method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent having a stable porous structure according to claim 1, characterized in that: In the zinc and iron salt mixed solution prepared in step 1, the molar concentration of the soluble zinc salt is higher than the molar concentration of the soluble iron salt.

3. The method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent having a stable porous structure according to claim 2, characterized in that: In the zinc and iron salt mixed solution prepared in step 1, the molar concentration of the soluble zinc salt is 1.2 to 2.4 mol / L; the molar concentration of the soluble iron salt is 0.3 to 0.6 mol / L.

4. The method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent having a stable porous structure according to claim 3, characterized in that: The soluble zinc salt described in step 1 is one of zinc chloride, zinc sulfate or zinc nitrate; the soluble iron salt described in step 1 is one of ferric chloride, ferric sulfate or ferric nitrate.

5. The method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure according to claim 1, characterized in that: In the alkaline mixed solution prepared in step 1, the molar concentration of the organic amine alkaline salt is 0.5-1.0 mol / L; the molar concentration of the soluble silicate is 0.8-1.6 mol / L.

6. The method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent having a stable porous structure according to claim 5, characterized in that: The organic amine alkaline salt described in step 1 is one of tetraethylammonium bicarbonate, tetrapropylammonium bicarbonate or tetrabutylammonium bicarbonate; the soluble silicate described in step 1 is one of sodium silicate or potassium silicate.

7. The method for preparing a ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure according to claim 1, characterized in that: In step 2, the temperature of the water bath reaction is 80° C. to 100° C., and the stirring time of the water bath reaction is 12 to 24 hours.

8. A ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure, characterized in that: The desulfurization adsorbent is prepared by the preparation method of the ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure according to any one of claims 1 to 7.

9. Use of the ZnO / ZnFe2O4 desulfurization adsorbent with a stable porous structure according to claim 8 in high-temperature desulfurization.

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