Method for treating automobile exhaust based on carbon material with traditional Chinese medicine porous structure
Through the preparation method of traditional Chinese medicine porous structure carbon materials, the problems of high catalyst cost and limited stability of inorganic porous materials are solved, and low-cost and efficient automobile exhaust treatment is achieved, which is practical and economical.
Patent Information
- Application Number
- CN202510925364.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-05
- Publication Date
- 2025-09-26
AI Technical Summary
In existing automobile exhaust treatment technologies, the high cost of catalysts and the high preparation cost of inorganic porous structure materials, as well as their limited stability and catalytic effects, limit their widespread application.
A method for preparing carbon materials with porous structures of traditional Chinese medicine is adopted, which includes the steps of washing, grinding, hydrothermal carbonization, washing to neutrality, drying and high-temperature carbonization of root residues. The porous carbon material is prepared using readily available traditional Chinese medicine waste residues and used as a catalyst carrier for automobile exhaust treatment.
It reduces production costs, improves catalytic performance and reaction efficiency, enhances the performance of automobile exhaust treatment devices, and promotes the resource utilization of traditional Chinese medicine waste residues.
Smart Images
Figure CN120695808A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile exhaust treatment, in particular to a method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine. Background Art
[0002] Harmful substances in automobile exhaust cause serious harm to the environment and human health, so it is very important to effectively treat automobile exhaust. Currently, commonly used automobile exhaust treatment technologies include physical adsorption, chemical adsorption and catalytic oxidation. Among them, catalytic oxidation is an efficient automobile exhaust treatment method, but the high price of high-quality catalysts limits its widespread application.
[0003] Therefore, the research and development of low-cost, high-efficiency automobile exhaust treatment materials has become a research hotspot. In recent years, automobile exhaust treatment devices based on porous carbon materials have become one of the research focuses. They have the advantages of large porosity and high specific surface area, and can improve the adsorption capacity and catalytic reaction efficiency of automobile exhaust.
[0004] However, the currently commonly used inorganic porous structure materials, such as activated carbon and molecular sieves, have high preparation costs, are difficult to produce, and have certain limitations in catalytic effect and stability.
[0005] To this end, the present invention provides a method for treating automobile exhaust gas using a carbon material based on a porous structure of traditional Chinese medicine to solve the above problems. Summary of the Invention
[0006] In view of the deficiencies in the prior art, the present invention provides a method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine, which solves the above problems.
[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine, comprising the following steps: S1: Washing, grinding and screening the root residues: grind and screen the root residues of traditional Chinese medicine, dry them and grind them into granular materials, weigh the required amount for later use; S2: Hydrothermal carbonization and activation: The granular Chinese medicine residue and alkali solution are mixed in a certain proportion, and then an appropriate amount of water is added. The mixture is placed in a sealed reactor and subjected to a hydrothermal treatment reaction at a reaction temperature of 160-220°C for a reaction time of 0.5-4 hours to obtain a carbonized product; S3: washing to neutrality and drying: the reacted sample is washed with deionized water and subjected to acid treatment and washing to remove impurities and unreacted drug residues to obtain pure carbon material; S4: high temperature carbonization: drying the washed product at a temperature of 80-100°C for 6-12 hours to obtain a dried carbonized product, and carbonizing the carbide in an inert gas atmosphere at a temperature of 400-750°C; S5: Porous carbon material absorbs exhaust gas: The above-mentioned carbon material is used as a catalyst carrier and applied to automobile exhaust treatment devices and absorption devices to treat automobile exhaust gas.
[0008] Preferably, the root-based Chinese medicine is Astragalus or Angelica, which have relatively developed root systems.
[0009] Preferably, the granular material is medicinal residue powder with a particle size within the range of 100-200 meshes.
[0010] Preferably, the alkali solution can be a lithium hydroxide solution, and the alkali solution concentration is 0.1M-4M, and the solid-liquid ratio of the medicinal residue to the alkali solution is 1:10-1:20.
[0011] Preferably, the inert gas may be nitrogen or argon.
[0012] The present invention provides a method for treating automobile exhaust using a carbon material with a porous structure based on traditional Chinese medicine, which has the following advantages and effects: Low cost: This technology uses readily available waste residues from traditional Chinese medicine to prepare carbon materials, avoiding the need for expensive carbon sources in traditional methods and reducing production costs. Large porosity: After carbonization treatment of traditional Chinese medicine waste residue, the generated porous carbon material has high porosity, which increases the reaction surface area and is conducive to the adsorption and catalytic reaction of harmful gases in automobile exhaust; Rich in active sites: Since traditional Chinese medicine waste residues contain a variety of active ingredients, the prepared carbon materials have abundant active sites, which can enhance the catalytic performance of automobile exhaust treatment devices and improve reaction efficiency; Improve the performance of automobile exhaust treatment devices: This carbon material can be used as an effective catalyst carrier in automobile exhaust treatment devices, effectively adsorbing and catalyzing harmful gases, reducing exhaust emissions and improving the performance of automobile exhaust treatment devices; Practicality and economic benefits: This technology is simple and easy to use, and has a wide range of applications. It is not only beneficial to improving the performance of automobile exhaust treatment devices, but also has a certain promoting effect on the resource utilization of traditional Chinese medicine waste residues. It has practicality and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a flow chart of a method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine, as proposed by the present invention. DETAILED DESCRIPTION
[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0015] See also Figure 1 A method for treating automobile exhaust gas using a carbon material based on a porous structure of traditional Chinese medicine comprises the following steps: S1: washing, grinding and screening the root residues: crushing and screening the root residues of the Chinese medicinal herbs. The root residues of the Chinese medicinal herbs are selected from astragalus or angelica with relatively developed root systems. After the astragalus or angelica are ground into powder, their surface area increases, and water evaporates more easily, thereby reducing the water content, which is not conducive to the growth and reproduction of microorganisms and prolonging the storage time. The well-developed root systems of the astragalus or angelica also facilitate the granulation process. After drying, the astragalus or angelica is crushed into granular materials, and the required amount is weighed for standby use. The granular materials are medicinal residue powders with a particle size within the range of 100-200 meshes; This technology utilizes readily available waste residues from traditional Chinese medicine to prepare carbon materials, avoiding the need for expensive carbon sources in traditional methods and reducing production costs. S2: Hydrothermal carbonization and activation: The above-mentioned granular Chinese medicine residue and alkali solution are mixed in a certain proportion, and then an appropriate amount of water is added. The mixture is placed in a closed reactor and subjected to a hydrothermal treatment reaction at a reaction temperature of 160-220°C and a reaction time of 0.5-4 hours to obtain a carbonized product. The alkali solution can be a lithium hydroxide solution with an alkali solution concentration of 0.1M-4M, and the solid-liquid ratio of the medicinal residue to the alkali solution is 1:10-1:20; S3: washing to neutrality and drying: the reacted sample is washed with deionized water and subjected to acid treatment and washing to remove impurities and unreacted drug residues to obtain pure carbon material; S4: high temperature carbonization: drying the washed product at a temperature of 80-100°C for 6-12 hours to obtain a dried carbonized product, and carbonizing the carbide in an inert gas atmosphere, such as nitrogen or argon, at a temperature of 400-750°C. After carbonization of Chinese medicine waste residue, the generated porous carbon material has high porosity, which increases the reaction surface area and is conducive to the adsorption and catalytic reaction of harmful gases in automobile exhaust; S5: Porous carbon material absorbs exhaust gas: The above carbon material is used as a catalyst carrier and applied to automobile exhaust treatment devices and absorption devices for automobile exhaust treatment; Since traditional Chinese medicine waste residues contain a variety of active ingredients, the prepared carbon materials have abundant active sites, which can enhance the catalytic performance of automobile exhaust treatment devices and improve reaction efficiency. This technology is simple and easy to use, and has a wide range of applications. It is not only beneficial to improving the performance of automobile exhaust treatment devices, but also has a certain driving effect on the resource utilization of traditional Chinese medicine waste residues. It has practicality and economic benefits.
[0016] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.
[0017] The overall process is: The root-based Chinese medicinal residues are crushed and screened to obtain medicinal residue powder with a particle size range of 100-200 mesh. This technology utilizes readily available Chinese medicinal residues to prepare carbon materials, avoiding the problem of using expensive carbon sources in traditional methods and reducing production costs. Mix the medicinal residue powder with an appropriate amount of lithium hydroxide and add a sufficient amount of aqueous solution to form a mixture. The solid-to-liquid ratio of the medicinal residue to the alkali solution is 1:10-1:20; the concentration of the alkali solution is 0.1M-4M (the alkali solution is not limited to lithium hydroxide). The mixture is added to an autoclave and heated at a certain temperature for a certain time to perform a hydrothermal carbonization reaction. In the present invention, the temperature in the autoclave is 160-220°C and the reaction time is 0.5-4 hours; The carbonized product is taken out and subjected to acid treatment and washing to remove impurities and unreacted drug residues to obtain a pure carbon material; The reacted sample was washed with deionized water and subjected to acid treatment and washing to remove impurities and unreacted drug residues to obtain pure carbon material; The carbon material is carbonized in an inert gas atmosphere (nitrogen, argon) at a carbonization temperature of 400-750°C. After the Chinese medicine waste residue is carbonized, the resulting porous carbon material has high porosity, which increases the reaction surface area, facilitating the adsorption and catalytic reaction of harmful gases in automobile exhaust. Since the Chinese medicine waste residue itself contains a variety of effective ingredients, the prepared carbon material has abundant active sites, which can enhance the catalytic performance of the automobile exhaust treatment device and improve the reaction efficiency. The prepared carbon material is subjected to surface modification and other treatments and then applied to an automobile exhaust treatment device. The carbon material can be used as an effective catalyst carrier and applied to the automobile exhaust treatment device to effectively adsorb and catalyze harmful gases, thereby reducing exhaust emissions and improving the performance of the automobile exhaust treatment device. This technology is simple and easy to use, and has a wide range of applications. It is not only beneficial to improving the performance of automobile exhaust treatment devices, but also has a certain driving effect on the resource utilization of traditional Chinese medicine waste residues. It has practicality and economic benefits.
[0018] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.
[0019] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine, characterized in that: The following steps are involved: S1: Washing, grinding and screening the root residues: grind and screen the root residues of traditional Chinese medicine, dry them and grind them into granular materials, weigh the required amount for later use; S2: Hydrothermal carbonization and activation: The granular Chinese medicine residue and alkali solution are mixed in a certain proportion, and then an appropriate amount of water is added. The mixture is placed in a sealed reactor and subjected to a hydrothermal treatment reaction at a reaction temperature of 160-220°C for a reaction time of 0.5-4 hours to obtain a carbonized product; S3: washing to neutrality and drying: the reacted sample is washed with deionized water and subjected to acid treatment and washing to remove impurities and unreacted drug residues to obtain pure carbon material; S4: high temperature carbonization: drying the washed product at a temperature of 80-100°C for 6-12 hours to obtain a dried carbonized product, and carbonizing the carbide in an inert gas atmosphere at a temperature of 400-750°C; S5: Porous carbon material absorbs exhaust gas: The above-mentioned carbon material is used as a catalyst carrier and applied to automobile exhaust treatment devices and absorption devices to treat automobile exhaust gas.
2. The method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine according to claim 1, characterized in that: The root-based Chinese medicinal materials are selected from Astragalus or Angelica with relatively developed root systems.
3. The method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine according to claim 1, characterized in that: The granular material is medicinal residue powder with a particle size within the range of 100-200 meshes.
4. The method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine according to claim 1, characterized in that: The alkali solution can be a lithium hydroxide solution, and the alkali solution concentration is 0.1M-4M, and the solid-liquid ratio of the medicinal residue to the alkali solution is 1:10-1:
20.
5. The method for treating automobile exhaust using a carbon material based on a porous structure of traditional Chinese medicine according to claim 1, characterized in that: The inert gas may be nitrogen or argon.