Pit sealing mud with high carbon sequestration capacity as well as preparation method and application of pit sealing mud
By adding sodium chloride and natural polymer binder to the cellar sealing mud, stable NaHCO3 and NH4Cl are formed, increasing the surface area of the agglomerate, and the problem of insufficient adsorption effect of traditional cellar sealing mud on CO2 is solved, significantly reducing the brewing process of white wine carbon emissions in it.
Patent Information
- Application Number
- CN202411669299.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-01-03
AI Technical Summary
During the brewing process of traditional liquor, the adsorption effect and ability of the cellar sealing mud on the CO2 produced by fermentation has not been studied, which leads to carbon emission problems. NH4HCO3 is prone to decomposition during the recycling process, causing CO2 escape.
Add sodium chloride and natural polymer binders, such as sodium carboxymethylcellulose, sodium alginate, and guar gum to the cellar sealing mud, and form stable NaHCO3 and NH4Cl with CO2 and NH4 through sodium chloride, which is naturally high Molecular adhesives increase the surface area of the agglomerate and enhance carbon sequestration ability.
The adsorption of CO2 and NH4 by the sealing mud is significantly increased, effectively reducing carbon emissions during the brewing process of liquor.
Smart Images
Figure CN119242394A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of winemaking, and in particular relates to a cellar-sealing mud with high carbon fixation capacity, a preparation method thereof, and an application thereof. Background Art
[0002] Chemical absorption is the most mature CO2 capture and separation technology used in coal-fired power plants, promising large-scale commercialization. While liquid absorbents (such as amines) facilitate continuous operation during the carbon capture process, and the technology is increasingly mature, it still faces challenges such as high operating costs and energy consumption. Compared to chemical absorption, solid adsorption offers significant advantages in terms of capture costs, and solid adsorbents possess numerous excellent properties, including a high specific surface area, strong CO2 adsorption capacity, low energy consumption for adsorbent regeneration, and high physical and chemical stability in humid environments.
[0003] Due to the unique production characteristics of the baijiu (white liquor) brewing industry, in addition to CO2 production due to energy consumption, CO2 is also released during the fermentation process. Literature reports indicate that approximately one ton of CO2 is produced for every ton of baijiu produced. In traditional solid-state baijiu brewing processes, after the mash is placed in the cellar, it is compacted and sealed with yellow mud. This mud is evenly applied to the mash, tamped, flattened, and smoothed to a thickness of approximately 10 cm. The mud is made by gently tamping high-quality and aged yellow mud. It possesses the granularity and porosity of earth and possesses a certain degree of physical adsorption. It also provides an anaerobic environment for brewing microorganisms, preventing the invasion of microorganisms from the external environment. Solid-state adsorption of CO2 is a common technical method, but there are currently no reports on the ability of this mud to absorb gases generated during baijiu brewing, particularly its effectiveness and ability to absorb CO2 produced during fermentation. Previous research has shown that during the baijiu (white spirit) brewing process, cellar mud absorbs CO₂ and NH₄ produced by fermentation, forming NH₄HCO₃. However, this mud needs to be recycled and reused, and NH₄HCO₃ easily decomposes during the recycling and stirring process, causing the immobilized CO₂ to escape. Therefore, developing a method to enhance and stabilize CO₂ adsorption by cellar mud is beneficial for reducing carbon emissions from baijiu brewing. Summary of the Invention
[0004] The present invention aims to overcome the deficiencies of the prior art and provide a method for improving the carbon sequestration capacity of cellar sealing mud.
[0005] The technical solution adopted by the present invention to solve its technical problem is:
[0006] In a first aspect, the present invention provides a cellar-sealing mud with high carbon fixation capacity, wherein the cellar-sealing mud contains sodium chloride and a natural polymer adhesive.
[0007] Furthermore, the above-mentioned natural polymer adhesive includes but is not limited to sodium carboxymethyl cellulose, sodium alginate, and guar gum.
[0008] Furthermore, the content of the sodium chloride is 2 to 6 g / kg.
[0009] Furthermore, the content of the natural polymer adhesive is 0.01 to 0.2 g / kg.
[0010] In a second aspect, the present invention provides a method for preparing the above-mentioned cellar-sealing mud, that is, adding a sodium chloride solution and a natural polymer adhesive suspension during the preparation of the cellar-sealing mud.
[0011] Furthermore, the amount of the sodium chloride solution added is 10 to 20 mL / kg.
[0012] Furthermore, the concentration of the sodium chloride solution is 20-30%.
[0013] Furthermore, the amount of the natural polymer adhesive suspension added is 10 to 20 mL / kg.
[0014] Furthermore, the concentration of the natural polymer adhesive suspension is 0.5-1%.
[0015] In a third aspect, the present invention provides the use of the above-mentioned cellar-sealing mud, or the cellar-sealing mud prepared by the above-mentioned preparation method, in the process of liquor brewing.
[0016] The present invention has the following beneficial effects: It provides a method for improving the carbon sequestration capacity of cellar-sealing mud. The principle is to add a certain proportion of sodium chloride and a natural polymer binder to the cellar-sealing mud. The sodium chloride can react with the CO2 and NH4 produced by liquor fermentation to form more stable NaHCO3 and NH4Cl. The natural polymer binder can increase the aggregates of the cellar-sealing mud, increase the surface area of the aggregates, and enhance the carbon sequestration capacity. When the cellar-sealing mud of the present invention is used to seal the cellars in the traditional liquor solid-state brewing process, it can effectively absorb the CO2 and NH4 produced by fermentation, which is beneficial for reducing carbon emissions from liquor brewing. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a schematic diagram of using sealing mud to seal the cellar. DETAILED DESCRIPTION
[0018] The technical scheme and effect of the present invention are further described below by actual examples. Those skilled in the art will appreciate that the following examples are merely illustrative of the present invention and should not be construed as limiting the scope of the present invention. Where specific techniques or conditions are not specified in the examples, they are performed according to the techniques or conditions described in the literature in this area or according to the product specifications. Reagents or instruments used that do not specify the manufacturer are all conventional products that can be obtained commercially.
[0019] Example
[0020] Carbon sequestration in cellar mud during the liquor fermentation process was verified using a 25L fermentation barrel. Using a 25L fermentation barrel filled with mash, 2kg of cellar mud was collected for later use. In Examples 1-5, sodium chloride solution was added to the 2kg of cellar mud, stirred evenly, and then a natural polymer binder suspension was added and mixed thoroughly before sealing. The specific process is shown in Table 1. Comparative Example 1 used traditional cellar mud for sealing. This traditional mud differs from the mud used in Examples 1-5 in that neither sodium chloride solution nor the natural polymer binder suspension was added.
[0021] Table 1 Preparation process of sealing mud
[0022]
[0023]
[0024] After fermentation, the carbonate and ammonia contents in the sealing mud were measured. The test results are shown in Table 2.
[0025] Table 2 Effects of improving carbon sequestration in sealing mud
[0026] <![CDATA[Adsorbed CO2 (mg / kg)]]> <![CDATA[Ammonium adsorption (mg / kg)]]> Comparative Example 170 330 Example 1 590 450 Example 2 730 560 Example 3 780 700 Example 4 670 610 Example 5 630 550
[0027] As can be seen from Table 2, the amount of CO2 and NH4 adsorbed by the cellar sealing mud of the present invention is greatly increased compared with the traditional cellar mud. The technical solution of the present invention can effectively reduce carbon emissions in the liquor brewing process.
Claims
1. A cellar sealing mud with high carbon fixation capacity, characterized by: The cellar sealing mud contains sodium chloride and natural polymer adhesive.
2. The cellar sealing mud with high carbon fixation capacity according to claim 1, characterized in that: The natural polymer adhesive includes but is not limited to sodium carboxymethyl cellulose, sodium alginate, and guar gum.
3. The cellar sealing mud with high carbon fixation capacity according to claim 1, characterized in that: The content of the sodium chloride is 2-6 g / kg.
4. The cellar sealing mud with high carbon fixation capacity according to claim 1, characterized in that: The content of the natural polymer adhesive is 0.01-0.2 g / kg.
5. The method for preparing the cellar sealing mud according to any one of claims 1 to 4, characterized in that: Sodium chloride solution and natural polymer adhesive suspension are added during the preparation of the sealing mud.
6. The method for preparing the cellar sealing mud according to claim 5, characterized in that: The amount of sodium chloride solution added is 10-20 mL / kg.
7. The method for preparing the cellar sealing mud according to claim 6, characterized in that: The concentration of the sodium chloride solution is 20-30%.
8. The method for preparing the cellar sealing mud according to claim 5, characterized in that: The added amount of the natural polymer adhesive suspension is 10-20 mL / kg.
9. The method for preparing the cellar sealing mud according to claim 8, characterized in that: The concentration of the natural polymer adhesive suspension is 0.5-1%.
10. Use of the cellar-sealing mud according to any one of claims 1 to 4, or the cellar-sealing mud prepared by the preparation method according to any one of claims 5 to 9, in the process of liquor brewing.