Modified resin carbon dioxide trapping agent as well as preparation method and regeneration method thereof

Abstract

The invention relates to the technical field of carbon capture, utilization and storage, in particular to a modified resin carbon dioxide trapping agent and a preparation method and regeneration method thereof, and the modified resin carbon dioxide trapping agent comprises the following raw materials in parts by weight: 2-10 parts of urea resin, 0.5-2 parts of cysteine, 1-5 parts of chitosan, 5-15 parts of gelatin, 0.5-2 parts of titanium dioxide and 4-8 parts of N-hydroxyethyl piperazine. According to the modified resin carbon dioxide trapping agent disclosed by the invention, through elaborately designed raw material combination and interaction, the adsorption capacity of the modified resin carbon dioxide trapping agent on carbon dioxide is remarkably improved through rich active sites and pore structures inside the modified resin carbon dioxide trapping agent; meanwhile, the catalyst not only has good ultraviolet aging resistance, but also can catalyze the decomposition of NOX to reduce the damage of NOX to resin, so that the resin can keep better performance stability in a long-term use process; and finally, various components in the resin interact with one another, so that the modified resin forms a structure with strong anti-interference performance, and the structure can enable the modified resin to still keep good trapping performance in a complex environment.

Description

Technical Field

[0001] The present invention relates to the field of carbon capture, utilization and storage, and in particular to a modified resin carbon dioxide capture agent and a preparation method and a regeneration method thereof. Background Art

[0002] As the global climate change problem becomes increasingly serious, reducing greenhouse gas emissions, especially carbon dioxide (CO2) emissions, has become a focus of widespread international attention. As an important means of emission reduction, the development and application of Carbon Capture, Utilization and Storage (CCUS) technology is of great significance to promoting the green transformation of energy structure and promoting the sustainable development of economy and society.

[0003] CCUS technology covers the entire chain from capturing CO2 at the source, transportation, utilization to final safe storage. Among them, CO2 capture, as the primary link in the technology chain, is directly related to the efficiency and cost of subsequent utilization and storage. Although traditional CO2 capture methods, such as chemical absorption and physical adsorption, have achieved effective capture of CO2 to a certain extent, they generally have problems such as high energy consumption, difficulty in material regeneration, and high cost, which limit their large-scale commercial application. Therefore, the development of new, efficient and economical CO2 capture materials has become a hot topic in current research.

[0004] In recent years, resin materials have shown great potential in the field of gas separation and capture due to their good processability, high specific surface area and adjustable chemical properties. In particular, chemical modification can significantly improve the selective adsorption capacity of resin materials for specific gases, providing a new idea for achieving efficient and low-cost CO2 capture. Modified resins can not only capture CO2 through physical adsorption, but also achieve more efficient capture through chemical bonding. Under certain designs, the adsorbent can be recycled and regenerated, greatly reducing operating costs.

[0005] However, although modified resins show great potential in carbon dioxide capture, the following problems still exist:

[0006] 1. High cost: The preparation process often involves complex chemical modification steps and high-cost raw materials, resulting in high overall costs, which limits the competitiveness of modified resins in large-scale commercial applications;

[0007] 2. Difficulty in regeneration: Some modified resins are difficult to regenerate effectively after capturing carbon dioxide. The regeneration process may require high temperature, high pressure or special chemical reagents, which not only increases operating costs, but may also cause secondary pollution to the environment;

[0008] 3. Limited selectivity: Although the modified resin can improve its selective adsorption capacity for carbon dioxide through chemical modification, it may still be interfered by other gases (such as nitrogen, oxygen, etc.) in practical applications, resulting in less than ideal selectivity;

[0009] 4. Insufficient stability: During long-term use, the performance of some modified resins may decline due to chemical degradation, physical wear and other reasons, affecting their stability and service life.

[0010] In view of this, the present invention is proposed. Summary of the invention

[0011] The object of the present invention is to provide a modified resin carbon dioxide capture agent and a preparation method and a regeneration method thereof. The modified resin carbon dioxide capture agent of the present invention has excellent carbon dioxide adsorption performance, anti-aging performance and anti-interference performance.

[0012] In a first aspect, the present invention provides a modified resin carbon dioxide capture agent, comprising the following raw materials in parts by weight:

[0013] 2-10 parts of urea-formaldehyde resin, 0.5-2 parts of cysteine, 1-5 parts of chitosan, 5-15 parts of gelatin, 0.5-2 parts of titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0014] As a preferred embodiment of the present technical solution, the chitosan is acid-soluble chitosan.

[0015] Acid-soluble chitosan can more effectively adsorb carbon dioxide due to its optimized molecular structure and exposure of active groups. Therefore, the use of acid-soluble chitosan in combination with other ingredients can significantly increase the amount of carbon dioxide captured by the modified resin. In addition, chitosan itself has a certain adsorption capacity for a variety of substances, and acid-soluble chitosan has a strong selective adsorption of carbon dioxide. Therefore, the selection of acid-soluble chitosan can also effectively reduce the interference of other gases during the adsorption process. Finally, the selection of acid-soluble chitosan mixed with other resin components can also enhance the overall stability of the capture agent, allowing it to maintain stable capture performance over a wider range of temperature and humidity.

[0016] As a preferred embodiment of the present technical solution, the gelatin is food grade gelatin.

[0017] First, the use of food-grade gelatin in the modified resin carbon dioxide capture agent can ensure the safety of the capture agent and avoid harm to the human body and the environment during use; secondly, food-grade gelatin has good compatibility, which helps to improve the overall performance and stability of the capture agent, so that it can maintain a stable capture effect during use; food-grade gelatin also has excellent foaming properties and can form a large number of tiny bubbles in the capture agent. These bubbles can not only increase the porosity of the capture agent and improve its adsorption capacity for carbon dioxide, but also make the capture agent more fluffy and easy to operate during use; food-grade gelatin contains rich amino groups, which can interact with carbon dioxide to improve the adsorption efficiency and selectivity of the capture agent for carbon dioxide. At the same time, the amino group can also react with other active groups (such as carboxyl, hydroxyl, etc.) to form a cross-linked structure, further enhancing the stability and durability of the capture agent; finally, as a natural polymer compound, food-grade gelatin has good biocompatibility and degradability, which can not only reduce pollution to the environment, but also realize the recycling of resources.

[0018] As a preferred embodiment of the present technical solution, the particle size of the titanium dioxide is 0.2-0.4 μm, and industrial grade titanium dioxide can be directly selected.

[0019] Titanium dioxide with a particle size of 0.2-0.4μm has an extremely high specific surface area and can provide more adsorption sites, thereby improving the collector's ability to adsorb carbon dioxide. At the same time, by using titanium dioxide of a specific particle size, the macroporous structure of the polymer can be regulated to obtain a polymer adsorption material matrix with a uniform pore structure, which is conducive to the diffusion and transmission of carbon dioxide molecules, thereby increasing the adsorption rate and amount of the collector. In addition, titanium dioxide can also form a relatively uniform network coverage on the surface of the polymer pores to further improve the material's adsorption / desorption cycle stability, thereby extending the service life of the collector and reducing replacement costs. Finally, choosing industrial-grade titanium dioxide as a raw material can also reduce production costs and simplify the production process.

[0020] Specifically, the active free radicals generated by TiO2 under ultraviolet light can effectively catalyze the oxidation of nitrogen oxides into NO3 - , which can also catalyze the oxidation of sulfur oxides into sulfates. Therefore, the introduction of TiO2 can reduce SO X 、NO X Competitive adsorption of CO2. In addition, resin and gelatin will age due to ultraviolet rays when exposed to the outdoors, while the introduction of TiO2 can block or absorb ultraviolet rays and extend the overall service life.

[0021] As a preferred embodiment of the present technical solution, the modified resin carbon dioxide capture agent of the present invention comprises the following raw materials in parts by weight:

[0022] 4-6 parts of urea-formaldehyde resin, 0.5-2 parts of cysteine, 2-4 parts of chitosan, 8-12 parts of gelatin, 0.5-2 parts of titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0023] In a second aspect, the present invention also discloses a method for preparing the modified resin carbon dioxide capture agent, which specifically comprises the following steps:

[0024] S1. Immediately add cysteine ​​to the aqueous solution of urea-formaldehyde resin to fully react and obtain a mixed solution;

[0025] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0026] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0027] S4, adding gelatin and N-hydroxyethylpiperazine to the mixed suspension in step S3 in sequence, stirring sufficiently to obtain a modified resin;

[0028] S5. Heat the modified resin and form it to obtain a modified resin carbon dioxide capture agent.

[0029] In the preparation method of the present invention, first, cysteine ​​is immediately added to the aqueous solution of urea-formaldehyde resin to ensure sufficient contact and reaction between cysteine ​​and urea-formaldehyde resin to form a stable chemical bond, thereby improving the overall performance of the collector; chitosan is further added to the mixed solution and fully dissolved to further increase the adsorption sites of the collector, and the selective adsorption capacity of the collector for carbon dioxide is improved by the unique chemical structure of acid-soluble chitosan; titanium dioxide is then added to the modified solution and fully stirred to form a stable suspension, which provides a good foundation for subsequent molding and adsorption processes; the foaming properties of gelatin are further introduced to facilitate air to enter the interior of the resin smoothly, and N-hydroxyethylpiperazine is used to adjust the overall liquid resin to a weak alkalinity to further improve the adsorption capacity for carbon dioxide; finally, the prepared modified resin can be filled and molded according to the mold, and can also be applied to the required working environment to capture carbon dioxide.

[0030] It can be seen that the preparation method of the modified resin carbon dioxide capture agent of the present invention does not require harsh conditions such as high temperature and high pressure during the preparation process, which reduces energy consumption and safety hazards, and each step is relatively simple and easy to control. Therefore, the method is easy to large-scale industrial production and can meet the needs of different fields for carbon dioxide capture agents.

[0031] As a preferred embodiment of the present technical solution, in step S1, in the aqueous solution of urea-formaldehyde resin, the mass ratio of urea-formaldehyde resin to water is 1:(2-4).

[0032] As a preferred embodiment of the present technical solution, in step S4, N-hydroxyethylpiperazine is added to adjust the pH of the system to 8-9.

[0033] As a preferred embodiment of the present technical solution, in step S5, during the heating and molding, the temperature is controlled to be 50-70°C and the time is 2-4 hours. After the heating is completed, the mixture is cooled to room temperature to obtain a modified resin carbon dioxide capture agent.

[0034] Finally, the present invention also discloses a regeneration method of the modified resin carbon dioxide capture agent, which specifically comprises: treating the failed modified resin carbon dioxide capture agent at 70-90° C. for 5-15 minutes to obtain a regenerated modified resin carbon dioxide capture agent.

[0035] The present invention can achieve regeneration by placing the failed collector at 70-90°C for 5-15 minutes. This temperature range and time length are milder than the traditional high-temperature regeneration method (such as MEA amine washing method, which requires high-temperature desorption at 100-150°C), and does not require complex chemical reagents or cumbersome operations, which not only reduces the difficulty of operation, but also reduces the pollution and waste that may be generated during the regeneration process. The regenerated collector of the present invention can still maintain a high adsorption efficiency and can be recycled for multiple times, effectively extending the service life of the collector.

[0036] The modified resin carbon dioxide capture agent of the present invention has at least the following beneficial effects:

[0037] The modified resin carbon dioxide capture agent of the present invention comprises the following raw materials in parts by weight: 2-10 parts of urea-formaldehyde resin, 0.5-2 parts of cysteine, 1-5 parts of chitosan, 5-15 parts of gelatin, 0.5-2 parts of titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine. Among them, firstly, urea-formaldehyde resin has good viscosity and easy processability, and has low cost, and is an ideal matrix for preparing the capture agent; in addition, urea-formaldehyde resin releases formaldehyde during the preparation process, and formaldehyde can react with the amino group in cysteine, thereby fixing cysteine ​​and preventing it from being lost in subsequent steps. Cysteine ​​is an amino acid containing amino and carboxyl groups, which not only reacts with formaldehyde in urea-formaldehyde resin, but also undergoes esterification reaction with chitosan; in addition, the presence of amino and carboxyl groups in cysteine ​​also increases the active sites of the resin and improves its adsorption capacity for carbon dioxide. Chitosan is a natural polymer that also contains abundant amino and hydroxyl groups. The cross-linked structure formed by the esterification reaction between chitosan and the carboxyl group in cysteine ​​not only enhances the mechanical strength of the resin, but also further introduces amino groups to improve the adsorption efficiency of carbon dioxide. Titanium dioxide is an excellent photocatalyst that can effectively catalyze NO XThe decomposition of titanium dioxide can reduce its damage to the resin, thereby extending the service life of the resin; at the same time, titanium dioxide has excellent UV resistance and can significantly improve the resin's resistance to UV aging outdoors. Gelatin has foaming properties, which can increase the porosity inside the resin, facilitate the entry of air (including carbon dioxide) into the resin, and improve the adsorption efficiency. As a regulator, N-hydroxyethylpiperazine can adjust the overall liquid resin to a weakly alkaline environment, which is conducive to the absorption and fixation of carbon dioxide. Therefore, the amino group in gelatin and N-hydroxyethylpiperazine work together to further enhance the resin's ability to adsorb carbon dioxide.

[0038] Therefore, the modified resin carbon dioxide capture agent obtained by the present invention through the carefully designed raw material combination and interaction has rich active sites and pore structure inside that significantly improves its adsorption capacity for carbon dioxide; at the same time, it not only has good resistance to ultraviolet aging, but also can catalyze NO X The decomposition of the modified resin reduces its damage to the resin, allowing the resin to maintain good performance stability during long-term use; finally, the interaction of various components in the resin enables the modified resin to form a structure with strong anti-interference ability, and this structure allows the modified resin to maintain good capture performance in a complex environment. DETAILED DESCRIPTION

[0039] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form also includes the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this description, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] Example 1

[0043] The modified resin carbon dioxide capture agent in this embodiment includes the following raw materials in parts by weight:

[0044] 2 parts of urea-formaldehyde resin, 0.5 parts of cysteine, 1 part of acid-soluble chitosan, 5 parts of food-grade gelatin, 0.5 parts of industrial-grade titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0045] The preparation method of the modified resin carbon dioxide capture agent in this embodiment comprises the following steps:

[0046] S1, dissolving the urea-formaldehyde resin in water twice the weight of the urea-formaldehyde resin, and then immediately adding cysteine ​​to the aqueous solution of the urea-formaldehyde resin to fully react to obtain a mixed solution;

[0047] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0048] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0049] S4, adding gelatin to the mixed suspension in step S3, adjusting the pH of the system to 8-9 using N-hydroxyethylpiperazine, and stirring thoroughly to obtain a modified resin;

[0050] S5. Heat the modified resin at 50° C. for 4 hours, and cool to room temperature to obtain a modified resin carbon dioxide capture agent.

[0051] Example 2

[0052] The modified resin carbon dioxide capture agent in this embodiment includes the following raw materials in parts by weight:

[0053] 10 parts of urea-formaldehyde resin, 2 parts of cysteine, 5 parts of acid-soluble chitosan, 15 parts of food-grade gelatin, 2 parts of industrial-grade titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0054] The preparation method of the modified resin carbon dioxide capture agent in this embodiment comprises the following steps:

[0055] S1, dissolving the urea-formaldehyde resin in water of 4 times the weight of the urea-formaldehyde resin, and then immediately adding cysteine ​​to the urea-formaldehyde resin aqueous solution to fully react to obtain a mixed solution;

[0056] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0057] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0058] S4, adding gelatin to the mixed suspension in step S3, adjusting the pH of the system to 8-9 using N-hydroxyethylpiperazine, and stirring thoroughly to obtain a modified resin;

[0059] S5. Heat the modified resin at 70° C. for 2 h, and cool to room temperature to obtain a modified resin carbon dioxide capture agent.

[0060] Example 3

[0061] The modified resin carbon dioxide capture agent in this embodiment includes the following raw materials in parts by weight:

[0062] 4 parts of urea-formaldehyde resin, 0.5 parts of cysteine, 2 parts of acid-soluble chitosan, 8 parts of food-grade gelatin, 0.5 parts of industrial-grade titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0063] The preparation method of the modified resin carbon dioxide capture agent in this embodiment comprises the following steps:

[0064] S1, dissolving the urea-formaldehyde resin in water 3 times the weight of the urea-formaldehyde resin, and then immediately adding cysteine ​​to the aqueous solution of the urea-formaldehyde resin to fully react to obtain a mixed solution;

[0065] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0066] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0067] S4, adding gelatin to the mixed suspension in step S3, adjusting the pH of the system to 8-9 using N-hydroxyethylpiperazine, and stirring thoroughly to obtain a modified resin;

[0068] S5. Heat the modified resin at 60° C. for 3 h, and cool to room temperature to obtain a modified resin carbon dioxide capture agent.

[0069] Example 4

[0070] The modified resin carbon dioxide capture agent in this embodiment includes the following raw materials in parts by weight:

[0071] 6 parts of urea-formaldehyde resin, 2 parts of cysteine, 4 parts of acid-soluble chitosan, 12 parts of food-grade gelatin, 2 parts of industrial-grade titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0072] The preparation method of the modified resin carbon dioxide capture agent in this embodiment comprises the following steps:

[0073] S1, dissolving the urea-formaldehyde resin in water 3 times the weight of the urea-formaldehyde resin, and then immediately adding cysteine ​​to the aqueous solution of the urea-formaldehyde resin to fully react to obtain a mixed solution;

[0074] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0075] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0076] S4, adding gelatin to the mixed suspension in step S3, adjusting the pH of the system to 8-9 using N-hydroxyethylpiperazine, and stirring thoroughly to obtain a modified resin;

[0077] S5. Heat the modified resin at 60° C. for 3 h, and cool to room temperature to obtain a modified resin carbon dioxide capture agent.

[0078] Example 5

[0079] The modified resin carbon dioxide capture agent in this embodiment includes the following raw materials in parts by weight:

[0080] 5 parts of urea-formaldehyde resin, 1 part of cysteine, 3 parts of acid-soluble chitosan, 10 parts of food-grade gelatin, 1 part of industrial-grade titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0081] The preparation method of the modified resin carbon dioxide capture agent in this embodiment comprises the following steps:

[0082] S1, dissolving the urea-formaldehyde resin in water 3 times the weight of the urea-formaldehyde resin, and then immediately adding cysteine ​​to the aqueous solution of the urea-formaldehyde resin to fully react to obtain a mixed solution;

[0083] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0084] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0085] S4, adding gelatin to the mixed suspension in step S3, adjusting the pH of the system to 8-9 using N-hydroxyethylpiperazine, and stirring thoroughly to obtain a modified resin;

[0086] S5. Heat the modified resin at 60° C. for 3 h, and cool to room temperature to obtain a modified resin carbon dioxide capture agent.

[0087] Example 6

[0088] The modified resin carbon dioxide capture agent in this embodiment includes the following raw materials in parts by weight:

[0089] 5 parts of urea-formaldehyde resin, 1.5 parts of cysteine, 3 parts of acid-soluble chitosan, 10 parts of food-grade gelatin, 1.5 parts of industrial-grade titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

[0090] The preparation method of the modified resin carbon dioxide capture agent in this embodiment comprises the following steps:

[0091] S1, dissolving the urea-formaldehyde resin in water 3 times the weight of the urea-formaldehyde resin, and then immediately adding cysteine ​​to the aqueous solution of the urea-formaldehyde resin to fully react to obtain a mixed solution;

[0092] S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution;

[0093] S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension;

[0094] S4, adding gelatin to the mixed suspension in step S3, adjusting the pH of the system to 8-9 using N-hydroxyethylpiperazine, and stirring thoroughly to obtain a modified resin;

[0095] S5. Heat the modified resin at 55° C. for 4 hours, and cool to room temperature to obtain a modified resin carbon dioxide capture agent.

[0096] Comparative Example 1

[0097] This comparative example is basically the same as Example 5, except that polypropylene resin is used instead of the urea-formaldehyde resin in Example 1.

[0098] Comparative Example 2

[0099] This comparative example is substantially the same as Example 5, except that acrylic resin is used instead of the urea-formaldehyde resin in Example 1.

[0100] Comparative Example 3

[0101] This control example is substantially the same as Example 5, except that glycine is used to replace the cysteine ​​in Example 1.

[0102] Comparative Example 4

[0103] This control example is substantially the same as Example 5, except that glutamic acid is used to replace the cysteine ​​in Example 1.

[0104] Comparative Example 5

[0105] This control example is substantially the same as Example 5, except that food grade pectin is used instead of the food grade gelatin in Example 1.

[0106] Test Example 1

[0107] The present invention tests the carbon dioxide adsorption performance of the modified resin carbon dioxide capture agent prepared in Example 5 and Comparative Examples 1-5, and the test method is as follows:

[0108] Arrangement 30m 3 Sealed laboratory with carbon dioxide sensor and 300m 3 / h fan, placing the modified resin carbon dioxide capture agent in a sealed laboratory;

[0109] Start the fan at 300m 3 The machine was operated at an air volume of 1.375 g / h. The current, voltage and other parameters of the fan were observed and recorded, as well as the changes in the carbon dioxide concentration in the laboratory. The reading of the carbon dioxide sensor was recorded every 1 minute.

[0110] The test results are shown in Table 1-2.

[0111] Table 1 Adsorption effect of different capture agents on carbon dioxide in Example 5 and Comparative Examples 1-5

[0112]

[0113]

[0114] Table 2 Adsorption effect of different capture agents on carbon dioxide after 100 cycles in Example 5 and Comparative Examples 1-5

[0115]

[0116] It can be seen from Table 1-2 that the carbon dioxide capture agent prepared in Example 5 of the present invention has not only a higher adsorption rate for carbon dioxide, but also good cycle stability compared with Control Examples 1-5.

[0117] Test Example 2

[0118] The present invention further regenerated the failed collector in Experimental Example 1, and tested the adsorption performance of the regenerated collector. The test results are shown in Table 3.

[0119] The regeneration method is as follows: the failed collector is placed at 80° C. for 10 minutes to obtain a regenerated collector.

[0120] Table 3 Adsorption effect of different failed collectors on carbon dioxide after regeneration in Example 5 and Comparative Examples 1-5

[0121]

[0122] It can be seen from Table 3 that the collector prepared in Example 5 of the present invention can still maintain a high adsorption efficiency after failure regeneration compared with control examples 1-5, thereby effectively extending the service life of the collector.

[0123] Test Example 3

[0124] The present invention also tests the anti-interference performance of the modified resin carbon dioxide capture agent prepared in Example 5 and Comparative Examples 1-5, and the test method is as follows:

[0125] Arrangement 30m 3 Sealed laboratory with carbon dioxide sensor, nitrogen dioxide sensor and 300m 3 / h fan, place the modified resin carbon dioxide capture agent in a sealed laboratory, and introduce 400PPM NO2;

[0126] Start the fan at 300m 3 The fan was operated at an air volume of 1 / h, and the current, voltage and other parameters of the fan were observed and recorded, as well as the changes in the carbon dioxide concentration in the laboratory. The reading of the carbon dioxide sensor was recorded every 1 minute. The test results are shown in Table 4.

[0127] Table 4 Anti-interference performance data

[0128]

[0129] It can be seen from Table 4 that the trapping agent prepared in Example 5 of the present invention can still maintain good trapping performance in a nitrogen dioxide environment and has excellent anti-interference performance compared with control examples 1-5.

[0130] In summary, the modified resin carbon dioxide capture agent prepared by the present invention not only has excellent carbon dioxide adsorption performance, but also has high stability and anti-interference performance.

[0131] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A modified resin carbon dioxide capture agent, characterized in that: The invention comprises the following raw materials in parts by weight: 2-10 parts of urea-formaldehyde resin, 0.5-2 parts of cysteine, 1-5 parts of chitosan, 5-15 parts of gelatin, 0.5-2 parts of titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

2. The modified resin carbon dioxide capture agent according to claim 1, characterized in that: The chitosan is acid-soluble chitosan.

3. The modified resin carbon dioxide capture agent according to claim 1, characterized in that: The gelatin is food grade gelatin.

4. The modified resin carbon dioxide capture agent according to claim 1, characterized in that: The particle size of the titanium dioxide is 0.2-0.4 μm.

5. The modified resin carbon dioxide capture agent according to claim 1, characterized in that: The invention comprises the following raw materials in parts by weight: 4-6 parts of urea-formaldehyde resin, 0.5-2 parts of cysteine, 2-4 parts of chitosan, 8-12 parts of gelatin, 0.5-2 parts of titanium dioxide and 4-8 parts of N-hydroxyethylpiperazine.

6. The method for preparing the modified resin carbon dioxide capture agent according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Immediately add cysteine ​​to the aqueous solution of urea-formaldehyde resin to fully react and obtain a mixed solution; S2, adding chitosan to the mixed solution in step S1 and fully dissolving it to obtain a modified solution; S3, immediately adding titanium dioxide to the modified solution in step S2, stirring thoroughly to obtain a mixed suspension; S4, adding gelatin and N-hydroxyethylpiperazine to the mixed suspension in step S3 in sequence, stirring sufficiently to obtain a modified resin; S5. Heat the modified resin and form it to obtain a modified resin carbon dioxide capture agent.

7. The preparation method according to claim 6, characterized in that: In step S1, in the aqueous solution of urea-formaldehyde resin, the mass ratio of urea-formaldehyde resin to water is 1:(2-4).

8. The preparation method according to claim 6, characterized in that: In step S4, N-hydroxyethylpiperazine is added to adjust the pH of the system to 8-9.

9. The preparation method according to claim 6, characterized in that: In step S5, during the heating and molding, the temperature is controlled to be 50-70° C. and the time is 2-4 hours.

10. The method for regenerating the modified resin carbon dioxide capture agent according to any one of claims 1 to 5, characterized in that: The failed modified resin carbon dioxide capture agent is placed at 70-90° C. for 5-15 minutes to obtain a regenerated modified resin carbon dioxide capture agent.

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