CN115025747A - High-performance PH 3 Preparation method, product and application of adsorbent - Google Patents
High-performance PH 3 Preparation method, product and application of adsorbent Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/3078—Thermal treatment, e.g. calcining or pyrolizing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/55—Compounds of silicon, phosphorus, germanium or arsenic
- B01D2257/553—Compounds comprising hydrogen, e.g. silanes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Oil, Petroleum & Natural Gas (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The invention discloses a high-performance PH 3 A preparation method, a product and an application of an adsorbent relate to the technical field of air pollution control. The method comprises the following steps: carrying out hydrothermal reaction on a mixed aqueous solution of Cu salt and Ce salt to obtain CuO-CeO 2 A precursor; for the CuO-CeO 2 Calcining the precursor to obtain the high-performance PH 3 An adsorbent. The method has the advantages of simple operation, rich raw materials, wide sources, easy realization of industrial application and better application prospect. The bi-component CuO-CeO prepared by the method of the invention 2 High performance PH 3 The appearance of the adsorbent is walnut-shaped and the surface of the adsorbent is rough, so that more pores are generated, the specific surface area and the active sites are increased, the adsorption of phosphine molecules is facilitated, and the adsorbent canCan realize the pH value under the condition of low temperature and oxygen-free atmosphere 3 High efficiency and stability of removal of and pH 3 The penetration capacity is higher.
Description
Technical Field
The invention relates to the technical field of air pollution control, in particular to a high-performance PH 3 A preparation method of the adsorbent, a product and application.
Background
Yellow phosphorus is an important product in the chemical industry, and theoretically, 2500-3000 m can be generated every 1t of yellow phosphorus produced by using an electric furnace method 3 The yellow phosphorus tail gas of (2) is mainly composed of CO (85% -90%), and has a higher heating value. But because the yellow phosphorus tail gas contains PH besides CO 3 Equal impurities, pH 3 The presence of (2) can easily result in the poisoning and deactivation of various catalysts in the carbonization industry, especially for noble metal catalysts such as palladium, rhodium, ruthenium and the like. In addition, the pH 3 Has strong biological toxicity, the comprehensive mechanism of poisoning is still unclear, and no effective antidote or treatment method is found at present. PH value 3 Enters the human body mainly through the respiratory tract and then is distributed to the whole body through the blood. Inhalation of pH 3 Can affect the heart, respiratory system, kidney, intestines and stomach, nervous system, liver, etc. Long term exposure to low concentrations of pH 3 The symptoms of dizziness, headache, insomnia, general weakness, inappetence, nausea and the like can appear, and the patient can be exposed to higher-concentration PH 3 Can directly lead to death of adults. The pH of the yellow phosphorus tail gas, the domestic biogas, the landfill gas, the semiconductor photoelectric industry tail gas and the like is 3 Is the main source of (1). However, over the past decades, pH 3 DischargingThe problem is still lacking in the degree of importance in some regions. Therefore, in order to comprehensively implement the concept of circular economy and construct a resource efficient recycling system, and in order to fully guarantee the human health and solve the problem of ecological environment, the PH value existing in each tail gas must be adjusted 3 Effective removal is performed.
pH at home and abroad 3 The related technical research of high-efficiency removal is short, and the gas-solid adsorption method, the adsorption-oxidation method and the catalytic decomposition method are currently representative of PH 3 A purification and removal method. However, these several representative purification and removal methods still have major drawbacks and disadvantages, such as higher working temperature of catalytic decomposition method (c) ((b))>420 ℃) and the catalyst is easy to be poisoned and deactivated. Also, although the adsorption-oxidation method is considered to be a very potential and effective solution, the development and application of the currently researched adsorbent still have major problems (poor adsorption performance, long preparation period and the like), and the currently developed adsorbent based on the adsorption-oxidation method is difficult to meet the current practical industrial application requirements.
Thus, a pH having a short preparation cycle and excellent adsorption performance is provided 3 The preparation method of the adsorbent has important significance for the technical field of air pollution control.
Disclosure of Invention
Based on the above, the present invention provides a high performance PH 3 A preparation method, a product and application of the adsorbent. The method firstly utilizes a simple hydrothermal method to synthesize a precursor, and then calcines the precursor to finally obtain the CuO-CeO 2 High performance PH 3 An adsorbent. The preparation process uses pure water as a solvent, and further ensures the environmental protection and economic benefits of the preparation process. Has the characteristics of short preparation period and good adsorption performance.
In order to achieve the purpose, the invention provides the following scheme:
one of the technical schemes of the invention is a high-performance PH 3 The preparation method of the adsorbent comprises the following steps:
carrying out hydrothermal reaction on a mixed aqueous solution of Cu salt and Ce salt to obtain CuO-CeO 2 A precursor;
for the CuO-CeO 2 Calcining the precursor to obtain the high-performance PH 3 An adsorbent.
Further, Cu in the mixed aqueous solution 2+ And Ce 3+ The molar ratio of (A) to (B) is 15:1 to 25: 1. The purpose is to add a proper amount of rare earth element cerium on the surface of the adsorbent to further enhance the adsorption performance of the adsorbent.
Further, Cu in the mixed aqueous solution 2+ The concentration of (B) is 0.05mol/L to 0.15 mol/L.
Further, the Cu salt is Cu (CH) 3 COO) 2 (ii) a The Ce salt is Ce (CH) 3 COO) 3 。
Further, a carbonate solution is added to the mixed aqueous solution before the hydrothermal reaction is carried out.
Further, CO in carbonate solution 2 3 - The concentration of (A) is 0.2-0.5 mol/L; CO in solution 2 3 - And Cu 2+ The molar ratio of (a) to (b) is 4:5 to 3: 2. The carbonate solution is added to provide CO 2 3 - The aim is to ensure the full synthesis of the precursor.
Further, the carbonate solution is Na 2 CO 3 Solution, K 2 CO 3 One of the solutions.
Further, the temperature of the hydrothermal reaction is 120-160 ℃, and the time is 10-13 h.
Further, after the hydrothermal reaction is finished, the method also comprises the steps of centrifugal separation, washing the generated precursor for 2-3 times by using distilled water and absolute ethyl alcohol, and drying for 7-9 hours at the temperature of 50-80 ℃.
Further, the calcination treatment specifically comprises: calcining the mixture for 3 to 4 hours in air at the temperature of between 300 and 600 ℃. Aims to fully synthesize the double components CuO-CeO 2 High performance PH 3 The adsorbent is used for further enhancing the specific surface area of the adsorbent and improving the adsorption performance.
The second technical scheme of the invention is that the high-performance PH prepared by the preparation method 3 An adsorbent.
Third technical solution of the present invention, the high performance PH 3 Adsorbent for removing PH by adsorption-oxidation 3 The use of (1).
Further, the conditions of adsorption-oxidation removal are as follows: oxygen-free atmosphere, 30-150 ℃.
The invention discloses the following technical effects:
the invention utilizes a simple hydrothermal method to synthesize a precursor, and then calcines the precursor. The addition of Ce salt can ensure that CuO is dispersed more uniformly, prevent the aggregation of single CuO particles, ensure that the specific surface area of the single copper oxide particles is smaller, directly influence the specific surface area of the adsorbent due to the aggregation phenomenon, and play an important role in the uniform dispersion of copper. Meanwhile, since CuO and CeO 2 The strong interaction between the two components finally causes the prepared adsorbent to be in a walnut-like shape, and the special spherical coarse structure of the adsorbent can generate more pores and active sites, thereby being beneficial to the adsorption of phosphine molecules. The method of the invention uses pure water as solvent, and has environmental protection and economy. The method has the advantages of simple operation, rich raw materials, wide sources, easy realization of industrial application and better application prospect.
The bi-component CuO-CeO prepared by the method of the invention 2 High performance PH 3 The adsorbent is peach-like in shape and rough in surface, so that more pores are generated, the specific surface area and active sites of the adsorbent are increased, phosphine molecules can be adsorbed easily, and the pH value of the adsorbent can be adjusted under the low-temperature oxygen-free atmosphere 3 High efficiency and stability of removal of and pH 3 The penetration capacity is higher. The experimental results of test example 2 show that the high performance pH prepared according to the present invention 3 Adsorbent for pH value under low-temperature and oxygen-free conditions 3 The removal efficiency is maintained to be more than 97 percent, the time is as long as 360min, and the phosphorus capacity is as high as 272.8mg (PH) 3 ) Per g (adsorbent) illustrating the high performance pH provided by the present invention 3 Adsorbent pH at low temperature in the absence of oxygen 3 The method has the advantages of high removal efficiency, long penetration time, large phosphorus capacity and excellent overall adsorption performance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 shows a high performance pH as prepared in example 1 3 A microscopic topography of the sorbent;
FIG. 2 shows a high performance pH as prepared in example 1 3 A microscopic topography of the adsorbent;
FIG. 3 shows a high performance pH prepared in example 1 3 Adsorbent, conventional solid copper oxide adsorbent prepared in example 2, and conventional solid CuO-CeO prepared in example 3 2 Adsorbent to pH 3 The removal effect of (2) is compared with the figure.
Detailed Description
Reference will now be made in detail to various exemplary embodiments of the invention, the detailed description should not be construed as limiting the invention but rather as a more detailed description of certain aspects, features and embodiments of the invention.
It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In addition, for numerical ranges in the present disclosure, it is understood that each intervening value, to the upper and lower limit of that range, is also specifically disclosed. Every smaller range between any stated value or intervening value in a stated range and any other stated or intervening value in a stated range is encompassed within the invention. The upper and lower limits of these smaller ranges may independently be included or excluded in the range.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference herein for the purpose of disclosing and describing the methods and/or materials associated with the documents. In case of conflict with any incorporated document, the present specification will control.
It will be apparent to those skilled in the art that various modifications and variations can be made in the specific embodiments of the present disclosure without departing from the scope or spirit of the disclosure. Other embodiments will be apparent to those skilled in the art from consideration of the specification. It is intended that the specification and examples be considered as exemplary only.
As used herein, the terms "comprising," "including," "having," "containing," and the like are open-ended terms that mean including, but not limited to.
The term "room temperature" as used herein means 20 to 25 ℃ unless otherwise specified.
Example 1 high Performance PH 3 Preparation of the adsorbent
(1) Preparing Cu (CH) with the concentration of 0.1mol/L 3 COO) 2 ·H 2 O solution to which Ce (CH) is added 3 COO) 3 Solution, control of Cu in solution 2+ And Ce 3+ Is 20: 1.
(2) Adding 0.3mol/LNa into the solution in the step (1) 2 CO 3 Solution, control of CO in solution 2 3 - And Cu 2+ Is 1: 1.
(3) And (3) placing the solution obtained in the step (2) into a reaction kettle, reacting for 12 hours at 140 ℃, after the reaction is finished and cooled, carrying out centrifugal separation, washing the generated precursor for 3 times by using distilled water and absolute ethyl alcohol, and drying for 8 hours at 60 ℃.
(4) Calcining the product obtained after drying in the step (3) for 3 hours in air at the temperature of 400 ℃, and cooling to room temperature to obtain CuO-CeO 2 High performance PH 3 An adsorbent.
CuO-CeO prepared in this example 2 High performance PH 3 The adsorbent had a specific surface area of 41.93 m 2 ·g -1 ) Pore volume of 0.16cm 3 ·g -1 。
EXAMPLE 2 preparation of conventional copper oxide configuration adsorbent
And (3) tabletting the nano copper oxide powder (99.5%, 40nm, Shanghai Michelin Biochemical technology Co., Ltd.) to obtain the pure copper oxide adsorbent with the particle diameter of 40-60 meshes in 15MPa for 45 s.
EXAMPLE 3 conventional solid CuO-CeO 2 Preparation of the adsorbent
This example uses a milling method to prepare conventional solid CuO-CeO 2 An adsorbent. Mixing nanometer cerium oxide (99.9%, 50nm, Shanghai Michelin Biochemical technology Co., Ltd.) and nanometer copper oxide (99.5%, 40nm, Shanghai Michelin Biochemical technology Co., Ltd.) according to Cu 2+ And Ce 3+ In a molar ratio of 20:1, adding the required CuO and CeO 2 After mixing together, the mixture was fully ground in an agate mortar until uniform. Then adding CuO and CeO 2 Calcining the mixture in air at 400 ℃ for 3h, cooling to room temperature, and tabletting the product (15MPa, 45s) to obtain the traditional solid CuO-CeO with the particle diameter of 40-60 meshes 2 An adsorbent.
Example 4 high Performance PH 3 Preparation of the adsorbent
(1) Preparing Cu (CH) with a concentration of 0.05mol/L 3 COO) 2 ·H 2 O solution to which Ce (CH) is added 3 COO) 3 Solution, control of Cu in solution 2+ And Ce 3+ In a molar ratio of 15: 1.
(2) Adding 0.25mol/LNa into the solution in the step (1) 2 CO 3 Solution, control of CO in solution - 3 2 And Cu 2+ In a molar ratio of 4: 5.
(3) And (3) putting the solution obtained in the step (2) into a reaction kettle, reacting for 13 hours at 100 ℃, after the reaction is finished and cooled, performing centrifugal separation, washing the generated precursor for 2 times by using distilled water and absolute ethyl alcohol, and drying for 9 hours at 50 ℃.
(4) Calcining the product obtained after drying in the step (3) for 4 hours in air at the temperature of 300 ℃, and cooling to room temperature to obtain CuO-CeO 2 High performance PH 3 An adsorbent.
CuO-CeO prepared in this example 2 High performance PH 3 The specific surface area of the adsorbent was 26.28m 2 ·g -1 Pore volume of 0.082cm 3 ·g -1 . To PH 3 The removal efficiency of (2) was maintained at 97% or more for 150min, and the phosphorus content was 113.6mg (pH) 3 ) In terms of/g (adsorbent).
Example 5 high Performance PH 3 Preparation of the adsorbent
(1) Preparing Cu (CH) with the concentration of 0.15mol/L 3 COO) 2 ·H 2 O solution to which Ce (CH) is added 3 COO) 3 Solution, control of Cu in solution 2+ And Ce 3+ Is 25: 1.
(2) Adding 0.5mol/LNa into the solution in the step (1) 2 CO 3 Solution, control of CO in solution - 3 2 And Cu 2+ In a molar ratio of 6: 5.
(3) And (3) placing the solution in the step (2) into a reaction kettle, reacting for 10 hours at 160 ℃, after the reaction is finished and cooled, performing centrifugal separation, washing the generated precursor for 3 times by using distilled water and absolute ethyl alcohol, and drying for 7 hours at 80 ℃.
(4) Calcining the product obtained after drying in the step (3) for 3 hours in air at the temperature of 600 ℃, and cooling to room temperature to obtain CuO-CeO 2 High performance PH 3 An adsorbent.
CuO-CeO prepared in this example 2 High performance PH 3 The specific surface area of the adsorbent is 30.15m 2 ·g -1 Pore volume of 0.13cm 3 ·g -1 . To PH 3 The removal efficiency of (2) was maintained at 97% or more for 240min, and the phosphorus content was 159.2mg (pH) 3 ) In terms of/g (adsorbent).
Example 6 high Performance PH 3 Preparation of the adsorbent
(1) Preparing Cu (CH) with the concentration of 0.1mol/L 3 COO) 2 ·H 2 O solution to which Ce (CH) is added 3 COO) 3 Solution, control of Cu in solution 2+ And Ce 3+ In a molar ratio of 22: 1.
(2) Adding 0.3mol/LNa into the solution in the step (1) 2 CO 3 Solution, control of CO in solution 2 3 - And Cu 2+ In a molar ratio of 13: 10.
(3) And (3) placing the solution in the step (2) into a reaction kettle, reacting for 12h at 150 ℃, after the reaction is finished and cooled, performing centrifugal separation, washing the generated precursor for 3 times by using distilled water and absolute ethyl alcohol, and drying for 8h at 60 ℃.
(4) Calcining the product obtained after drying in the step (3) in air at 500 ℃ for 3h, and cooling to room temperature to obtain CuO-CeO 2 High performance PH 3 An adsorbent.
CuO-CeO prepared in this example 2 High performance PH 3 The adsorbent has a specific surface area of 36.74m 2 ·g -1 Pore volume of 0.14cm 3 ·g -1 . To PH 3 The removal efficiency of (2) was maintained at 97% or more for 300min, and the phosphorus content was 227.4mg (pH) 3 ) In terms of/g (adsorbent).
Test example 1
For the CuO-CeO prepared in example 1 2 High performance PH 3 The adsorbents were subjected to physicochemical characterization analysis, in which the high performance pH was obtained by scanning electron microscopy (Gemini300, Zeiss, Germany) 3 Micro-topography information of the adsorbent. 5-10 mg of the adsorbent prepared in the embodiment 1 is weighed each time, the adsorbent particles to be tested are stuck on the conductive adhesive for sample preparation, all samples are subjected to Pt metal spraying treatment before testing so as to enhance the surface conductivity of the samples, and the operating voltage is 3.00 kV.
FIGS. 1 and 2 show CuO-CeO prepared in example 1 2 High performance PH 3 Microscopic topography of the sorbent. As can be seen from fig. 1 and 2, the material prepared in example 1 is walnut-like in morphology and the surface of the adsorbent is rough, so that more pores are generated, the specific surface area and the active sites are increased, and the adsorption of phosphine molecules is facilitated, so that the adsorption performance is obviously improved.
Test example 2
For the high performance PH prepared in example 1 3 Adsorbent (Walnut-shaped CuO-CeO) 2 ) Conventional Solid copper oxide adsorbent (Solid CuO) prepared in example 2 and conventional Solid CuO-CeO prepared in example 3 2 Adsorbent (Solid CuO-CeO) 2 ) And (3) performing performance test, wherein the test conditions are as follows: PH value 3 The concentration is 1000ppm, only nitrogen is used as carrier gas, the prepared adsorbent is placed in a fixed bed reactor under the condition of oxygen-free atmosphere, and the space velocity is 30000h -1 The reaction temperature is 60 ℃; the concentration of the inlet and outlet of the reactor is detected by gas chromatography.
As a result, as shown in FIG. 3, it can be seen from FIG. 3 that the high performance PH was obtained in example 1 3 Adsorbent (Walnut-shaped CuO-CeO) 2 ) Conventional solid CuO-CeO prepared in example 3 2 Adsorbent (Solid CuO-CeO) 2 ) And conventional Solid copper oxide adsorbent (Solid CuO) prepared in example 2 versus pH 3 The removal efficiency of (2) was maintained at 97% or more for 360min, 180min and 120min, respectively, and the phosphorus content was 272.8mg (pH) 3 ) Per g (adsorbent), 135.9mg (pH) 3 ) Per g (adsorbent) and 90.5mg (pH) 3 ) In terms of/g (adsorbent). Among them two components of CuO-CeO 2 Walnut-shaped adsorbent (i.e., high performance PH) 3 Adsorbent) performance significantly higher than that of solid CuO-CeO 2 Adsorbents and solid copper oxide adsorbents.
Test example 3
pH of examples 4 to 6 3 And (3) testing the adsorption performance, wherein the test conditions are as follows: PH value 3 The prepared adsorbent is placed in a fixed bed reactor under the condition of oxygen-free atmosphere with the concentration of 1000ppm and the space velocity of 30000h by only taking nitrogen as carrier gas -1 The reaction temperature is 60 ℃; the concentration of the inlet and outlet of the reactor is detected by gas chromatography.
As is clear from the results of the adsorption performance test in test example 3, examples 4 to 6 showed pH control 3 The time for maintaining the removal efficiency of more than 97 percent is respectively 150min, 240min and 300 min; phosphorus contents were 113.6mg (pH) 3 ) Per g (adsorbent), 159.2mg (pH) 3 ) Per g (adsorbent) and 227.4mg (pH) 3 ) In terms of/g (adsorbent). It can be seen that when the conditions for preparing the adsorbent are within the ranges specified in the claims of the present invention, the high performance adsorbent can be prepared with respect to pH 3 All have relatively excellent adsorptivity; but when the preparation conditions exist, the preparation conditions are not in line with the description of the claims of the inventionIn the loading range, the prepared adsorbent has a pH value 3 The adsorption performance of (2) is obviously reduced. For example, in comparison with examples 5 and 6, the hydrothermal temperature for synthesizing the adsorbent precursor in example 4 does not meet the hydrothermal temperature range (120- 3 The adsorption performance of the composite is poorer and even lower than that of the traditional solid CuO-CeO prepared in example 3 2 Adsorbent to pH 3 The adsorption performance of (3).
The results of various test examples of the invention show that the invention provides two components of CuO-CeO 2 Walnut-shaped high performance PH 3 The adsorbent has good adsorption activity and can realize pH value under the conditions of low temperature and no oxygen 3 High efficiency and stability, and is favorable for solving the problem of PH in industrial tail gas 3 The problem of emissions. Meanwhile, the preparation method provided by the invention is simple to operate, the preparation time of the adsorbent is relatively short, and meanwhile, pure water is used as a solvent, so that the environmental protection property and the economical efficiency are both considered. The high performance PH prepared by the invention 3 The adsorbent is walnut-shaped in appearance, the surface of the adsorbent is rough, more pores are generated, and the specific surface area and active sites are increased, so that the adsorbent has excellent adsorption activity and adsorption selectivity, and can be used for PH (potential of hydrogen) in various systems 3 Stable and high-efficiency removal and purification. At pH value 3 Compared with the traditional adsorbent, the prepared bi-component CuO-CeO has high efficiency in removal and purification 2 High performance PH 3 The adsorbent has better adsorption performance due to high specific surface area and high active sites, so the adsorbent has better practical application potential.
The above-described embodiments are only intended to illustrate the preferred embodiments of the present invention, and not to limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. High-performance PH 3 The preparation method of the adsorbent is characterized by comprising the following steps:
carrying out hydrothermal reaction on a mixed aqueous solution of Cu salt and Ce salt to obtain CuO-CeO 2 A precursor;
for the CuO-CeO 2 Calcining the precursor to obtain the high-performance PH 3 An adsorbent.
2. A high performance PH according to claim 1 3 The preparation method of the adsorbent is characterized in that Cu in the mixed aqueous solution 2+ And Ce 3+ The molar ratio of (A) to (B) is 15:1 to 25: 1.
3. A high performance PH according to claim 1 3 The preparation method of the adsorbent is characterized in that the Cu salt is Cu (CH) 3 COO) 2 (ii) a The Ce salt is Ce (CH) 3 COO) 3 。
4. A high performance PH as claimed in claim 1 3 A method for producing an adsorbent, characterized in that a carbonate solution is added to the mixed aqueous solution before hydrothermal reaction.
5. A high performance PH according to claim 4 3 The preparation method of the adsorbent is characterized in that CO in the carbonate solution 2 3 - The concentration of (A) is 0.2-0.5 mol/L; CO in solution 3 2- And Cu 2+ The molar ratio of (a) to (b) is 4:5 to 3: 2.
6. A high performance PH as claimed in claim 1 3 The preparation method of the adsorbent is characterized in that the temperature of the hydrothermal reaction is 120-160 ℃, and the time is 10-13 h.
7. A high performance PH according to claim 1 3 The preparation method of the adsorbent is characterized in that the calcination treatment specifically comprises the following steps: calcining the mixture for 3 to 4 hours in air at the temperature of between 300 and 600 ℃.
8. High performance PH produced by the process according to any of claims 1 to 7 3 An adsorbent.
9. The high performance PH of claim 8 3 Adsorbent for removing PH by adsorption-oxidation 3 The use of (1).
10. Use according to claim 9, wherein the conditions for the adsorption-oxidation removal are: oxygen-free atmosphere, 30-150 deg.C.
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