Sulfur-resistant and water-resistant catalyst for efficiently removing CVOCs as well as preparation method and application of sulfur-resistant and water-resistant catalyst
By loading noble metal Pt and transition metal Fe onto molecular sieves, a sulfur- and water-resistant catalyst was prepared, solving the problem of easy poisoning of existing catalysts at low temperatures and achieving efficient and low-cost CVOCs removal.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANCHANG UNIV
- Filing Date
- 2026-01-30
- Publication Date
- 2026-05-12
AI Technical Summary
Existing catalysts are difficult to remove CVOCs efficiently under low-temperature conditions and are susceptible to chlorine poisoning and water poisoning, leading to catalyst deactivation and high costs.
A sulfur- and water-resistant catalyst was prepared by supporting the noble metal Pt and the transition metal Fe on a molecular sieve support. The catalyst was formed through steps such as high-temperature calcination and water exchange with mixed aqueous solution.
It achieves efficient removal of CVOCs at low temperatures, reduces the amount of precious metals used, lowers costs, and maintains high catalytic activity in SO2 atmospheres, making it applicable to a wide range of applications.
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Figure CN122006792A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of air pollution purification, and in particular to a sulfur- and water-resistant catalyst for the efficient removal of CVOCs, its preparation method, and its application. Background Technology
[0002] Chlorinated volatile organic compounds (CVOCs) are a class of chlorine-containing organic pollutants with high volatility and toxicity. In modern industrial production and daily life, CVOCs are widely used in various products such as detergents, degreasers, chemical extractants, paint additives, inks, and adhesives, demonstrating significant practical value. Due to the high volatility and persistent degradation in the natural environment, most CVOCs can spread from their emission sources through atmospheric transport or water bodies, causing long-term and widespread environmental damage, with chlorobenzene being particularly hazardous. Therefore, low-temperature, high-efficiency end-of-pipe treatment technologies for CVOCs are crucial for achieving substantial reductions in CVOC emissions and ensuring ecological and environmental safety.
[0003] Among the various existing CVOCs end-of-pipe treatment technologies, catalytic removal technology has become one of the mainstream technologies due to its wide applicability. The performance of the catalyst is the core factor determining whether this type of technology can operate efficiently and stably. Currently, catalysts used for CVOCs catalytic removal can be mainly classified into three categories: (1) noble metal catalysts, which have good low-temperature activity but are too expensive; (2) transition metal oxide catalysts, which are cheap but are easily poisoned and deactivated; and (3) molecular sieve catalysts, which have good adsorption performance but are prone to carbon deposition and chlorine poisoning. Therefore, providing a low-temperature, high-efficiency, highly selective, and chlorine-poison-resistant CVOCs removal catalyst is an urgent problem to be solved in this field. Summary of the Invention
[0004] To address the aforementioned problems, this invention provides a sulfur- and water-resistant catalyst for efficient removal of CVOCs, its preparation method, and its applications. The catalyst prepared by this invention can achieve CVOCs removal at relatively low temperatures, while exhibiting high CO2 selectivity and hydrogen chloride selectivity.
[0005] The technical solution of the present invention is as follows: The first aspect of this invention protects a method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs, comprising the following steps: S1. The molecular sieve is calcined at high temperature and then cooled. S2. Weigh out the noble metal precursor and transition metal precursor according to the proportions and prepare a mixed aqueous solution. S3. The molecular sieve treated in step S1 is mixed and exchanged with the mixed aqueous solution, washed and filtered, and the solid is dried and calcined to obtain a catalyst that is resistant to sulfur and water and highly efficient in removing CVOCs.
[0006] Preferably, in step S1, The molecular sieve has a silica-to-alumina ratio of 1 to 100; The molecular sieve includes at least one of H-beta and H-ZSM-5; The high-temperature roasting temperature is 300~400℃, and the time is 2~3h.
[0007] Preferably, in step S2, The molar ratio of the noble metal element in the noble metal precursor to the transition metal element in the transition metal precursor is (0.04~2.0):(1~20). The precious metal element in the precious metal precursor includes Pt; The transition metal element in the transition metal precursor includes Fe.
[0008] Preferably, in step S2, The noble metal precursor includes a platinum precursor, which includes at least one of platinum tetraamminenitrate and chloroplatinic acid. The transition metal precursor includes an iron precursor, which includes ferrous chloride tetrahydrate.
[0009] Preferably, in step S3, the exchange includes sealing and stirring at 20~80℃ for 12~24h, and the stirring speed is 15~25r / s.
[0010] Preferably, in step S3, the drying conditions are: drying at 85~120℃ for 10~48h.
[0011] Preferably, in step S3, the calcination conditions are: calcination in an air atmosphere at 200~800℃ for 3~24h.
[0012] Preferably, in step S3, the total loading of noble metals and transition metals in the catalyst for removing CVOCs is 1~20 wt.%.
[0013] The second aspect of this invention protects a sulfur- and water-resistant catalyst for the efficient removal of CVOCs prepared by the method described in the first aspect.
[0014] The third aspect of this invention protects the application of a sulfur- and water-resistant, highly efficient CVOCs removal catalyst in CVOCs removal, wherein the catalyst is the sulfur- and water-resistant, highly efficient CVOCs removal catalyst described in the second aspect, and / or the sulfur- and water-resistant, highly efficient CVOCs removal catalyst prepared by the preparation method described in the first aspect.
[0015] The beneficial effects of this invention are as follows: This invention loads a bimetallic element, Pt, and a transition metal element, Fe, onto a molecular sieve support to prepare a catalyst that is resistant to sulfur and water and highly efficient in removing CVOCs. Compared with existing single noble metal catalysts, it not only significantly improves the catalytic conversion activity for CVOCs, but also effectively reduces the amount of noble metal Pt used, thereby greatly reducing the catalyst preparation cost.
[0016] The catalyst of this invention exhibits a wide temperature window, demonstrating excellent catalytic activity in the range of 200–400°C. Even at a low temperature of 310°C, the removal rate of chlorobenzene can reach over 90%, with low byproduct formation, high CO2 selectivity, and high hydrogen chloride selectivity during the reaction. Furthermore, the catalyst possesses excellent water resistance and SO2 poisoning resistance, enabling highly efficient catalytic conversion of chlorobenzene in SO2-containing atmospheres, making it suitable for a wide range of applications.
[0017] The catalyst of this invention exhibits highly efficient low-temperature catalytic activity, corresponding to a lower reaction activation energy, which helps to reduce reaction temperature and energy consumption in industrial applications, thereby reducing production costs. Furthermore, the preparation method of this catalyst is simple, operates under mild conditions, requires no complex equipment, and facilitates large-scale production and widespread application. Attached Figure Description
[0018] Figure 1 The conversion rate of chlorobenzene (CB) by the catalysts prepared in Examples 1-4 is given.
[0019] Figure 2 The selectivity of the catalysts prepared in Examples 1-4 for CO2 is shown.
[0020] Figure 3 The selectivity of the catalysts prepared in Examples 1-4 for HCl is shown.
[0021] Figure 4 The conversion rate of p-chlorobenzene (CB) by the catalysts prepared in Example 2, Comparative Examples 1 and 2 is given.
[0022] Figure 5 The selectivity of the catalysts for CO2 prepared in Example 2, Comparative Examples 1 and 2 is shown.
[0023] Figure 6 The selectivity of the catalysts for HCl prepared in Example 2, Comparative Examples 1 and 2 is shown.
[0024] Figure 7 The conversion rate of chlorobenzene (CB) by the catalysts prepared in Examples 2, 3 and 4 is given.
[0025] Figure 8 The selectivity of the catalysts for CO2 prepared in Examples 2, 3 and 4 is shown.
[0026] Figure 9 The selectivity of the catalysts for HCl prepared in Examples 2, 3 and 4 is shown.
[0027] Figure 10 The graph shows the catalytic removal conversion rate of p-chlorobenzene (CB) as a test of the sulfur resistance stability of the catalyst prepared in Example 2.
[0028] Figure 11 The graph shows the catalytic removal conversion rate of p-chlorobenzene (CB) as a test of the sulfur and water stability of the catalyst prepared in Example 2. Detailed Implementation
[0029] To further illustrate the technical means and effects adopted by the present invention in order to achieve the intended purpose, the specific embodiments according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments.
[0030] A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. The molecular sieve is calcined at high temperature and then cooled. S2. Weigh out the noble metal precursor and transition metal precursor according to the proportions and prepare a mixed aqueous solution. S3. The molecular sieve treated in step S1 is mixed and exchanged with the mixed aqueous solution, washed and filtered, and the solid is dried and calcined to obtain a catalyst that is resistant to sulfur and water and highly efficient in removing CVOCs.
[0031] In step S2, the molar ratio of the noble metal element in the noble metal precursor to the transition metal element in the transition metal precursor is (0.04~2.0):(1~20).
[0032] Understandably, in step S2, there is no limit to the concentration of noble metal precursors and transition metal precursors in the mixed aqueous solution.
[0033] In some embodiments, in step S3, the total loading of noble metals and transition metals in the catalyst for removing CVOCs is 1~20 wt.%.
[0034] Further preferred, in step S3, the total loading of noble metals and transition metals in the catalyst for removing CVOCs is 1~5 wt.%.
[0035] The total loading of noble metals and transition metals refers to the total content of noble metals and transition metals in the catalyst for removing CVOCs.
[0036] All raw materials used in the following embodiments and comparative examples of the present invention can be obtained by purchasing.
[0037] Example 1 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. Calcine the H-beta molecular sieve at 400°C for 3 hours and then allow it to cool naturally to room temperature. S2. According to the Pt / Fe molar ratio of 1:0.5, ferrous chloride tetrahydrate and platinum nitrate tetraammine nitrate were dissolved in deionized water to obtain a clear solution. S3. With a total metal loading of 1.27 wt.%, the molecular sieve treated in step S1 was placed in a clear solution and magnetically stirred at 20 r / s at 60 °C for 12 h to obtain a suspension. The suspension was then washed and filtered three times. The resulting filter cake was dried in an oven at 120 °C for 12 h, and finally calcined in a muffle furnace at 500 °C in air for 4 h to obtain the catalyst, denoted as Pt1Fe. 0.5 / beta-IE.
[0038] Example 2 The preparation method of a catalyst for the efficient removal of CVOCs by resisting sulfur and water is basically the same as that in Example 1, except that: the molar ratio of Pt / Fe in step S2 is 1:1; and the catalyst Pt1Fe1 / beta-IE is prepared in step S3.
[0039] Example 3 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs is basically the same as that in Example 1, except that: in step S2, the Pt / Fe molar ratio is 1:1.5; and in step S3, the catalyst Pt1Fe is prepared. 1.5 / beta-IE.
[0040] Example 4 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. Calcine the H-ZSM-5 molecular sieve at 400℃ for 3 hours and then allow it to cool naturally to room temperature; S2. Dissolve ferrous chloride tetrahydrate and platinum nitrate tetraammine in deionized water according to the Pt / Fe molar ratio of 1:1 to obtain a clear solution. S3. With a total metal loading of 1.27 wt%, the molecular sieve treated in step S1 is placed in a clear solution and stirred magnetically at 60°C for 12 h at a speed of 20 r / s to obtain a suspension. Then, it is filtered and washed three times. The resulting filter cake is placed in an oven and dried at 120°C for 12 h. Finally, it is calcined in a muffle furnace at 500°C in an air atmosphere for 4 h to obtain the catalyst, denoted as Pt1Fe1 / ZSM-5-IE.
[0041] Comparative Example 1 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. Calcine the H-beta molecular sieve at 400℃ for 3 hours and then allow it to cool naturally to room temperature; S2. Dissolve ferrous chloride tetrahydrate in deionized water to obtain a clear solution; S3. With a total metal loading of 1.27 wt.%, the molecular sieve treated in step S1 is placed in a clear solution and stirred magnetically at 60°C for 12 h at a speed of 20 r / s to obtain a suspension. Then, the suspension is filtered and washed three times. The resulting filter cake is placed in an oven and dried at 120°C for 12 h. Finally, it is calcined in a muffle furnace at 500°C in an air atmosphere for 4 h to obtain the catalyst, denoted as Fe1 / beta-IE.
[0042] Comparative Example 2 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. Calcine the H-beta molecular sieve at 400℃ for 3 hours and then allow it to cool naturally to room temperature; S2. Dissolve tetraammineplatinum nitrate in deionized water to obtain a clear solution; S3. With a total metal loading of 1.27 wt.%, the molecular sieve treated in step S1 is placed in a clear solution and stirred magnetically at 60°C for 12 h at a speed of 20 r / s to obtain a suspension. Then, the suspension is filtered and washed three times. The resulting filter cake is placed in an oven and dried at 120°C for 24 h. Finally, it is calcined in a muffle furnace at 500°C in an air atmosphere for 4 h to obtain the catalyst, denoted as Pt1 / beta-IE.
[0043] Comparative Example 3 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. Calcine the H-beta molecular sieve at 400℃ for 3 hours and then allow it to cool naturally to room temperature; S2. Dissolve ferric nitrate nonahydrate and platinum nitrate tetraammine in deionized water according to the Pt / Fe molar ratio of 1:1 to obtain a clear solution. S3. With a total metal loading of 1.27 wt.%, the molecular sieve treated in step S1 is placed in a clear solution and stirred magnetically at 60°C for 12 h at a speed of 20 r / s to obtain a suspension. Then, the suspension is filtered and washed three times. The resulting filter cake is placed in an oven and dried at 120°C for 24 h. Finally, it is calcined in a muffle furnace at 500°C in an air atmosphere for 4 h to obtain the catalyst, denoted as Pt1Fe1 / beta-N.
[0044] Comparative Example 4 A method for preparing a sulfur- and water-resistant catalyst for efficient removal of CVOCs includes the following steps: S1. Calcine the H-beta molecular sieve at 400℃ for 3 hours and then allow it to cool naturally to room temperature; S2. Dissolve ferrous chloride tetrahydrate and platinum nitrate tetraammine in deionized water according to the Pt / Fe molar ratio of 1:1 to obtain a clear solution. S3, with a total metal loading of 1.27 wt.%, the molecular sieve treated in step S1 was placed in a clear solution and magnetically stirred at 20 r / s and 60 °C until it evaporated to dryness to obtain a solid. Then, it was placed in an oven and dried at 120 °C for 12 h. Finally, it was calcined in a muffle furnace at 500 °C in an air atmosphere for 4 h to obtain the catalyst, denoted as Pt1Fe1 / beta-IMP.
[0045] Test case (1) The removal rate of chlorobenzene by the catalysts prepared in the above examples and comparative examples was tested using the following method. The test results are shown in Table 1.
[0046] The detection method is as follows: 150 mg of catalyst was weighed and placed in a quartz reaction tube. The reaction was carried out under a flow of reaction gas, with the temperature programmed to 280 °C. The reaction tail gas was continuously monitored in real time by FT-IR (resolution: 4 cm⁻¹, scans: 32 times / spectrum) in an insulated gas in-situ cell.
[0047] Table 1: Removal rate of chlorobenzene by the catalysts in the above examples and comparative examples Comparing Examples 1, 2, and 3, and referring to Table 1, it can be seen that within the range of Pt / Fe molar ratio of 1:(0.5 to 1.5), as the molar amount of Fe increases, the removal of chlorobenzene by the catalyst first increases and then decreases. The removal rate is relatively high at 1:1, which is 65%.
[0048] Comparing Example 2 and Example 4, and referring to Table 1, it can be seen that, under the same Pt / Fe molar ratio and loading, the catalyst prepared with molecular sieve H-beta as support in the low-temperature range has a better chlorobenzene removal rate than the catalyst prepared with molecular sieve H-ZSM-5 as support.
[0049] Comparing Examples 1-3 with Comparative Example 1, and referring to Table 1, it can be seen that, under the same loading rate, the removal rate of chlorobenzene by the catalyst supported only by Fe metal is significantly worse than that of the catalyst supported by Pt-Fe in this invention.
[0050] Comparing Examples 1-3 with Comparative Example 2, and referring to Table 1, it can be seen that, under the same loading rate, the removal rate of chlorobenzene by the Pt-Fe supported catalyst in this invention is not much different from that of the catalyst supported only by metal Pt, and Examples 1-2 even perform better.
[0051] Comparing Example 2 with Comparative Example 3, as shown in Table 1, the removal rate of chlorobenzene by the catalyst in Comparative Example 3 was significantly reduced. The reason for this is that the catalyst prepared from the ferric nitrate precursor exhibits obvious particle agglomeration characteristics, which may lead to the coverage of effective active sites and insufficient deep oxidation activity for large molecular CVOCs.
[0052] Comparing Example 2 with Comparative Example 4, as shown in Table 1, when the Pt / Fe molar ratio and loading are the same, the removal rate of chlorobenzene by the catalyst obtained by directly evaporating it during the impregnation process is reduced.
[0053] (2) The conversion rate and selectivity of the catalysts prepared in Examples 1-4 and Comparative Examples 1-4 were tested using the following methods.
[0054] The testing method is as follows: 150 mg of catalyst was weighed and placed into a fixed-bed reactor. A balance gas of 300 ppm CB, 5 vol% O2, and 120 ml / min N2 was introduced. Under programmed temperature rise, the temperature was maintained for 25 min at 25 °C intervals. The outlet concentrations of chlorobenzene, carbon dioxide, and hydrogen chloride were measured by FT-IR. The conversion rate and selectivity of the corresponding substances were calculated based on the changes in net outlet concentration.
[0055] Figure 1 The conversion rates of chlorobenzene (CB) by the catalysts prepared in Examples 1-4 are shown. Figure 2 The selectivity of the catalysts prepared in Examples 1-4 for CO2; Figure 3 The selectivity of the catalysts prepared in Examples 1-4 for HCl is shown. Figure 4 The conversion rate of chlorobenzene (CB) by the catalysts prepared in Example 2, Comparative Examples 1 and 2; Figure 5 The selectivity of the catalysts for CO2 prepared in Example 2, Comparative Examples 1 and 2; Figure 6 The selectivity of the catalysts for HCl prepared in Example 2, Comparative Examples 1 and 2 is shown. Figure 7 The conversion rate of chlorobenzene (CB) by the catalysts prepared in Examples 2, 3, and 4; Figure 8The selectivity of the catalysts for CO2 prepared in Example 2, Comparative Examples 3 and 4; Figure 9 The selectivity of the catalysts for HCl prepared in Examples 2, 3 and 4 is shown.
[0056] according to Figure 1-2 It can be seen that the conversion rate of chlorobenzene (CB) by the catalysts prepared in Examples 1-4 increases with increasing temperature in the range of 200-400℃, reaching approximately 90% at 300℃, with the catalysts in Examples 1-3 reaching nearly 100% at 350℃. The selectivity of the catalysts prepared in Examples 1-3 for CO2 reaches approximately 70% at 250℃, while the catalysts prepared in Examples 1-4 all reach nearly 100% at 300℃. This indicates that the catalytic reaction is relatively complete, and chlorobenzene is effectively oxidized to carbon dioxide. In other words, the catalysts prepared in Examples 1-4 all exhibit excellent CO2 selectivity at relatively low temperatures. Figure 3 It can be seen that the catalysts prepared in Examples 1 to 4 can achieve a selectivity of more than 90% for hydrogen chloride at 300°C. This indicates that the catalytic reaction is relatively complete and chlorobenzene is effectively converted into hydrogen chloride. In other words, the catalysts prepared in Examples 1 to 4 all exhibit excellent hydrogen chloride selectivity at relatively low temperatures.
[0057] according to Figures 4-5 It can be seen that the conversion rate of p-chlorobenzene (CB) and the selectivity of CO2 of the catalyst Pt1Fe1 / beta-IE prepared in Example 2 are not much different from those of the catalyst Pt1 / beta-IE in Comparative Example 2, and are significantly better than those of the catalyst Fe1 / beta-IE in Comparative Example 1. According to Figure 6 It can be seen that the selectivity of the Fe1 / beta-IE catalyst in Comparative Example 1 for hydrogen chloride is significantly worse than that of the catalysts prepared in Example 2 and Comparative Example 2.
[0058] according to Figures 7-9 It can be seen that the catalyst Pt1Fe1 / beta-N prepared in Comparative Example 3 has a conversion rate of only about 20% for chlorobenzene (CB) at 300℃, a selectivity of only about 60% for CO2, and a selectivity of only about 60% for hydrogen chloride, indicating that the catalyst in Comparative Example 3 has poor low-temperature performance.
[0059] according to Figure 7-8 It can also be seen that the catalyst Pt1Fe1 / beta-IMP prepared in Comparative Example 4 has a lower conversion rate of chlorobenzene (CB) than that in Example 2 in the low temperature region (less than 300°C), while the CO2 selectivity of the two is comparable, indicating that the low temperature performance of the catalyst prepared in Comparative Example 4 is worse than that in Example 2.
[0060] Figure 10This is a graph showing the catalytic removal conversion rate of chlorobenzene, a test of the sulfur resistance stability of the catalyst prepared in Example 2 of this invention. According to... Figure 10 It can be seen that under the condition of maintaining a constant temperature of 300℃, the performance of the catalyst remained almost unchanged after 7 hours of sulfur resistance testing, indicating that the catalyst has excellent sulfur resistance.
[0061] Figure 11 This is a graph showing the catalytic removal conversion rate of chlorobenzene, based on the sulfur and water resistance stability test of the catalyst prepared in Example 2 of this invention. Figure 11 It can be seen that the catalyst has excellent resistance to sulfur and water under the condition of maintaining a constant temperature of 300℃.
[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.
Claims
1. A method for preparing a catalyst that is resistant to sulfur and water and highly efficient in removing CVOCs, characterized in that, Includes the following steps: S1. The molecular sieve is calcined at high temperature and then cooled. S2. Weigh out the noble metal precursor and transition metal precursor according to the proportions and prepare a mixed aqueous solution. S3. The molecular sieve treated in step S1 is mixed and exchanged with the mixed aqueous solution, washed and filtered, and the solid is dried and calcined to obtain a catalyst that is resistant to sulfur and water and highly efficient in removing CVOCs.
2. The preparation method according to claim 1, characterized in that, In step S1, The molecular sieve has a silica-to-alumina ratio of 1 to 100; The molecular sieve includes at least one of H-beta and H-ZSM-5; The high-temperature roasting temperature is 300~400℃, and the time is 2~3h.
3. The preparation method according to claim 1, characterized in that, In step S2, The molar ratio of the noble metal element in the noble metal precursor to the transition metal element in the transition metal precursor is (0.04~2.0):(1~20). The precious metal element in the precious metal precursor includes Pt; The transition metal element in the transition metal precursor includes Fe.
4. The preparation method according to claim 1, characterized in that, In step S2, The noble metal precursor includes a platinum precursor, which includes at least one of platinum tetraamminenitrate and chloroplatinic acid. The transition metal precursor includes an iron precursor, which includes ferrous chloride tetrahydrate.
5. The preparation method according to claim 1, characterized in that, In step S3, the exchange includes sealing and stirring at 20~80℃ for 12~24h, and the stirring speed is 15~25r / s.
6. The preparation method according to claim 1, characterized in that, In step S3, the drying conditions are: drying at 85~120℃ for 10~48h.
7. The preparation method according to claim 1, characterized in that, In step S3, the calcination conditions are: calcination in an air atmosphere at 200~800℃ for 3~24h.
8. The preparation method according to claim 1, characterized in that, In step S3, the total loading of noble metals and transition metals in the catalyst for removing CVOCs is 1~20 wt.%.
9. A catalyst for the efficient removal of CVOCs by means of any one of claims 1 to 8, which is resistant to sulfur and water.
10. The application of a sulfur- and water-resistant catalyst for the efficient removal of CVOCs in CVOCs removal, characterized in that, The catalyst is the sulfur-resistant and water-resistant catalyst for efficient removal of CVOCs as described in claim 9, and / or the sulfur-resistant and water-resistant catalyst for efficient removal of CVOCs prepared by the preparation method described in any one of claims 1 to 8.