Visual measurement method and device for CO2-rich liquid desorption rate
By using video acquisition devices and image processing technology, combined with a diffuser plate and a circulating heating component, the problems of high energy consumption and inaccurate measurement of CO2-rich liquid desorption in the chemical desorption method were solved, and accurate quantitative measurement of the CO2 desorption rate on the catalyst surface was achieved.
Patent Information
- Application Number
- CN202510067525.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2045-01-16
AI Technical Summary
In the existing technology, the energy consumption of the CO2-rich liquid desorption process of the chemical desorption method is high, and the traditional measurement method cannot accurately and quantitatively evaluate the performance of the catalyst and is seriously interfered by non-catalyst surfaces.
A video acquisition device is used to record the size and time of CO2 bubbles on the catalyst surface. The CO2 desorption rate per unit area of the catalyst is calculated through image processing. A diffuser plate and a digital camera are used to improve image quality. A circulating heating component is used to achieve measurements at different temperatures.
The accurate quantitative measurement of the CO2 desorption rate on the catalyst surface is achieved, interference from non-catalyst surfaces is avoided, and the accuracy and reliability of the measurement are improved.
Smart Images
Figure CN119985828B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The embodiment of the present application relates to the technical field of boiler environmental protection and atmospheric environmental protection, and particularly relates to a visual measurement method and device for CO2 rich liquid desorption rate. BACKGROUND
[0002] Under the double carbon target, the chemical desorption method is a relatively mature carbon capture, utilization and storage (CCUS) technology, and at present, the chemical desorption method has been implemented in industrial demonstration in multiple coal-fired units. The bottleneck problem limiting large-scale application of the chemical desorption method is high energy consumption in the desorption process. One of the ways expected to reduce the high energy consumption of the chemical desorption method is to add catalyst particles to the desorbent, so as to realize rich liquid desorption under low temperature conditions through the introduction of Bronsted and Lewis acid sites. At present, the performance evaluation method for the catalyst for strengthening the rich liquid desorption of CO2 mainly is a continuous stirring reaction method. The method can only qualitatively measure the performance of different catalysts for strengthening the rich liquid desorption of CO2. Since the desorption process of the rich liquid can also occur on the reactor wall surface, the stirring paddle surface and the bubble rising process, this will cause interference to quantitative testing of the performance of the catalyst for catalyzing the rich liquid desorption of CO2. SUMMARY
[0003] The embodiment of the present application aims to at least solve one of the technical problems existing in the prior art, and provides a visual measurement method, system and device for CO2 rich liquid desorption rate.
[0004] In a first aspect, the embodiment of the present application provides a visual measurement device for CO2 rich liquid desorption rate, and the device comprises:
[0005] A reaction container, which is used to accommodate a catalyst / filler and an ethanolamine (MEA) solution;
[0006] A video acquisition device, which is arranged on one side of the reaction container, and is used to acquire a CO2 desorption video of a catalyst / filler surface in the reaction container;
[0007] a processor electrically connected with the video acquisition device, the processor configured to extract a CO2 desorption image of a predetermined ROI region from the CO2 desorption video; perform a binarization process on the CO2 desorption image to distinguish bubbles in the CO2 desorption image from a background; measure an area of the bubbles in the ROI region based on the CO2 desorption image after the binarization process; calculate a volume of the bubbles in the ROI region based on the area of the bubbles in the ROI region; and determine a time for the bubbles to pass through the ROI region based on a sequence of images in the CO2 desorption video, and calculate a CO2 desorption rate per unit area of the catalyst / filler based on the volume of the bubbles in the ROI region and an external surface area of the catalyst / filler.
[0008] In some possible embodiments, the CO2 desorption rate per unit area of the catalyst / filler is calculated by formula (1):
[0009]
[0010] wherein v CO2 / area is the CO2 desorption rate per unit area of the catalyst / filler, V CO2 is the volume of the bubbles in the ROI region, V m is a molar volume of a gas at a standard state, Δt is the time for the bubbles to pass through the ROI region, and S packing is the external surface area of the catalyst / filler.
[0011] In some possible embodiments, the device further comprises a light-emitting diode panel with a light diffusing plate.
[0012] The light-emitting diode panel and the video acquisition device are respectively arranged on two sides of the reaction vessel, and the light diffusing plate is clamped between the light-emitting diode panel and the reaction vessel.
[0013] In some possible embodiments, the video acquisition device is a digital camera.
[0014] In some possible embodiments, a horizontal center line of the video acquisition device and the catalyst / filler are at the same height.
[0015] In some possible embodiments, the reaction vessel is a jacketed beaker, and the device further comprises a circulating heating assembly, the circulating heating assembly comprising a pumping element, a circulating pipe, and a heating element.
[0016] A first end of the circulating pipe is in communication with a bottom sidewall of the jacketed beaker, a second end of the circulating pipe is in communication with a top sidewall of the jacketed beaker, and the pumping element and the heating element are sequentially arranged in the circulating pipe.
[0017] In some possible embodiments, the circulating heating assembly further comprises a temperature detecting element, which is inserted into the jacketed beaker.
[0018] In some possible embodiments, the ethanol amine solution is a 250ml 5M MEA solution with a CO2 loading of 0.47mol CO2 / mol MEA.
[0019] In a second aspect, the embodiments of the present application provide a method for visualizing and measuring the CO2 desorption rate of a CO2-rich liquid, which comprises:
[0020] obtaining a CO2 desorption video of a catalyst / packing surface;
[0021] extracting a CO2 desorption image of a predetermined ROI region from the CO2 desorption video;
[0022] performing a binaryzation process on the CO2 desorption image to distinguish bubbles from background in the CO2 desorption image;
[0023] measuring the area of bubbles in the ROI region based on the CO2 desorption image after the binaryzation process;
[0024] calculating the volume of bubbles in the ROI region based on the area of bubbles in the ROI region;
[0025] determining the time for bubbles to pass through the ROI region based on the image sequence in the CO2 desorption video, and combining the external surface area of the catalyst / packing and the volume of bubbles in the ROI region to calculate the CO2 desorption rate per unit area of the catalyst / packing.
[0026] In some possible embodiments, the CO2 desorption rate per unit area of the catalyst / packing is calculated by formula (1):
[0027]
[0028] wherein v is the CO2 desorption rate per unit area of the catalyst / packing, V is the volume of bubbles in the ROI region, V is the molar volume of gas at standard state, Δt is the time for bubbles to pass through the ROI region, and S is the external surface area of the catalyst / packing. CO2 / area CO2 m packing
[0029] The visual measurement method and device for CO2 rich liquid desorption rate of the embodiment of the application, through video acquisition device, record the size of CO2 bubbles desorbed from the catalyst surface and the time through ROI (region of interest), calculate the CO2 desorption rate of the catalyst per unit area, more accurately measure the enhanced rich liquid desorption CO2 performance of the catalyst, the device can avoid the interference from the CO2 generated from the non-catalyst surface in the traditional measurement method, and is a new method for directly measuring the CO2 formation / growth rate of the catalyst surface. BRIEF DESCRIPTION OF DRAWINGS
[0030] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the drawings needed to be used in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.
[0031] Figure 1 The structural schematic diagram of the visual measurement device for CO2 rich liquid desorption rate of the embodiment of the present application is shown in the figure.
[0032] Figure 2 The image processing flowchart of the embodiment of the present application is shown in the figure.
[0033] Figure 3 The CO2 bubble volume schematic diagram of the ROI of different catalysts / packings at different temperatures of the embodiment of the present application is shown in the figure.
[0034] Figure 4 The flowchart of the visual measurement method for CO2 rich liquid desorption rate of the embodiment of the present application is shown in the figure. DETAILED DESCRIPTION
[0035] In order to make those skilled in the art better understand the technical solutions of the present application, the present application will be further described in detail in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the present application.
[0036] Unless otherwise defined, technical terms and scientific terms used in the embodiments of the present application shall have the meanings that are commonly understood by one of ordinary skill in the art to which this application belongs. The terms "comprise", "include", "contain" and / or "have" used in the embodiments of the present application are intended to be construed as inclusive, unless otherwise indicated to the contrary. The terms "first", "second" and the like used in the embodiments of the present application do not necessarily indicate any importance or constitute a limitation, and are merely used to distinguish one element from another. Thus, a "first" and / or "second" feature can include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality" is two or more, unless otherwise explicitly defined specifically.
[0037] Unless otherwise specified, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in the embodiments are not intended to limit the scope of the present application. It should be understood that the dimensions of the parts shown in the drawings are not necessarily drawn to scale, and that techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the disclosure, if appropriate. In all examples shown and discussed herein, any specific other examples can have different values. It should be noted that similar symbols and letters represent similar items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.
[0038] In the description of the embodiments of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. The illustrative representations of the above terms in the embodiments of the present application do not necessarily refer to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the embodiments of the present application can be combined and combined with features of different embodiments or examples, if not mutually exclusive.
[0039] In the following, example embodiments according to the present application will be described in detail with reference to the accompanying drawings. It is obvious that the described embodiments are only some of the embodiments of the present application, and not all embodiments of the present application, and it should be understood that the present application is not limited to the example embodiments described herein.
[0040] Figure 1 A structural schematic diagram of a visual measurement device for CO2-rich liquid desorption rate of an embodiment of the present application, Figure 2 A flow chart of image processing of an embodiment of the present application.
[0041] As shown in Figure 1 and Figure 2 , an embodiment of the present application relates to a visual measurement device for CO2-rich liquid desorption rate, which comprises a reaction container 101, a video acquisition device 102 and a processor (not shown in the figure). The reaction container 101 contains a catalyst / filler and an ethanolamine solution. The video acquisition device 102 is arranged on one side of the reaction container 101, and the video acquisition device 102 is used to acquire the CO2 desorption video of the catalyst / filler surface in the reaction container 101. The processor is electrically connected with the video acquisition device 102.
[0042] Specifically, the processor is used to extract the CO2 desorption image of a predetermined ROI region of interest from the CO2 desorption video; perform binaryzation processing on the CO2 desorption image to distinguish the bubbles in the CO2 desorption image from the background; measure the area of the bubbles in the ROI region based on the CO2 desorption image after the binaryzation processing; calculate the volume of the bubbles in the ROI region based on the area of the bubbles in the ROI region; and determine the time of the bubbles passing through the ROI region based on the image sequence in the CO2 desorption video, and combine the external surface area of the catalyst / filler and the volume of the bubbles in the ROI region to calculate the CO2 desorption rate per unit area of the catalyst / filler.
[0043] The visual measurement device for CO2-rich liquid desorption rate of an embodiment of the present application records the size of the CO2 bubbles desorbed from the catalyst surface and the time of passing through the ROI region through the video acquisition device, and calculates the CO2 desorption rate per unit area of the catalyst, which can more accurately and quantitatively measure the performance of the catalyst in enhancing the CO2 desorption of the rich liquid. The device can avoid the interference of the CO2 generated from the non-catalyst surface in the traditional measurement method, and is a new method that can directly measure the formation / growth rate of the CO2 on the catalyst surface.
[0044] As shown in Figure 1 and Figure 2 , the CO2 desorption rate per unit area of the catalyst / filler is calculated by formula (1):
[0045]
[0046] Wherein, v CO2 / area is the CO2 desorption rate per unit area of the catalyst / filler, V CO2 is the volume of the bubbles in the ROI region, and V mis the molar volume of gas in standard state, Δt is the time it takes for the bubble to pass through the ROI area, S packing is the external surface area of the catalyst / packing.
[0047] For example, Figure 1 As shown, the device further includes an LED panel 104 with a light diffusion plate 103. The LED panel 104 and the video acquisition device 102 are respectively arranged on both sides of the reaction container 101, and the light diffusion plate 103 is sandwiched between the LED panel 104 and the reaction container 101.
[0048] In the visual measurement device for the desorption rate of CO2-rich liquid in an embodiment of the present invention, the diffuser plate can disperse the light emitted by the light emitting diode to make the lighting more uniform. This can avoid highlight areas and shadows caused by direct light, thereby improving the quality of the image. Direct use of light emitting diodes may cause strong reflections or reflection points on the surface of the cup, which will interfere with image capture. Diffusion of light through the diffuser plate can effectively reduce these reflections, making the objects in the image more clearly visible. Uniform and soft lighting helps to improve the contrast between different parts of the image, which is very important for video processing and analysis. Good contrast can make it easier for image processing algorithms to identify and distinguish different objects or features. In addition, the use of the diffuser plate in combination with the light emitting diode panel can adjust the light intensity and angle as needed. This flexibility enables the system to better adapt to different shooting conditions and environmental requirements.
[0049] For example, Figure 1 As shown, the video acquisition device 102 uses a digital camera, which generally provides very high resolution, which means that the video can capture more details. The high-quality sensor and advanced image processing technology ensure the authenticity of color reproduction and the clarity of the image, thereby improving the accuracy of the subsequent calculation of the CO2 rich liquid desorption rate.
[0050] For example, Figure 1 As shown, the horizontal centerline of the video acquisition device 102 is at the same height as the catalyst / packing material. This arrangement ensures consistent viewing angles, which is particularly important when comparing multiple samples or conducting long-term follow-up studies, as a consistent viewing angle reduces errors caused by variations in the camera angle. Especially when photographing objects requiring precise measurement, maintaining the camera at the same height as the object reduces perspective distortion, resulting in a more realistic and accurate image, further improving the accuracy of subsequent calculations of the CO2-rich solution desorption rate.
[0051] For example, Figure 1As shown, the reaction container 101 adopts a jacketed beaker. The device further comprises a circulating heating assembly, which comprises a pumping element 105, a circulating pipe 106 and a heating element 107. A first end of the circulating pipe 106 is in communication with the bottom sidewall of the jacketed beaker, a second end of the circulating pipe 106 is in communication with the top sidewall of the jacketed beaker, and the pumping element 105 and the heating element 107 are sequentially arranged in the circulating pipe 106. In some embodiments, the pumping element 105 can adopt a peristaltic pump, and the heating element 107 can adopt a water bath pot or the like.
[0052] The visual measurement device for CO2-rich liquid desorption rate of the embodiments of the present application can realize heating of the reaction container through the circulating heating assembly, so that the CO2 desorption rate per unit area of catalyst / packing at different temperatures can be measured. Further, when different catalysts / packings are placed in the reaction container, the CO2 desorption rate per unit area of catalyst / packing of different catalysts / packings at different temperatures can be further obtained.
[0053] For example, as shown in Figure 1 As shown, the circulating heating assembly further comprises a temperature detecting element 108, which is inserted into the jacketed beaker. The temperature detecting element 108 can adopt a thermocouple or the like.
[0054] For example, as shown in Figure 1 As shown, the ethanolamine solution is a 250ml 5M MEA solution with a CO2 loading of 0.47mol CO2 / mol MEA.
[0055] Hereinafter, the visual measurement device for CO2-rich liquid desorption rate of the present application will be described with a specific example.
[0056] For example, as shown in Figure 1As shown, a jacketed beaker with a size of 300 ml was used as the reaction vessel 101, and a light-emitting diode (LED) panel 104 with a diffuser plate 103 was placed on one side of the jacketed beaker, and the size of the LED panel was 180 mm x 130 mm. A digital camera was placed on the other side to capture the images of the desorbed gas bubbles above the catalyst / packing. A single catalyst / packing was placed at the bottom of the jacketed beaker. 250 ml of 5M MEA solution with a CO2 loading of 0.47 mol CO2 / mol MEA was added into the beaker, and the rich solution in the beaker was heated by using circulating hot water (96°C) in the jacket, and the flow rate of the circulating hot water was controlled by a peristaltic pump, and the flow rate was 1680 ml / min. As the temperature of the MEA solution increased, CO2 desorption occurred on the surface of the catalyst / packing. When the temperature of the solution reached 60, 65, 70, 75 and 80°C, respectively, the CO2 desorption process was recorded by using a digital camera with a macro lens. The horizontal center line of the camera field of view and the catalyst / packing were at the same height, the camera shooting frame rate was set to 240 frames / s, the ISO was set to 160, the exposure time was 1 / 1000 s, and the shooting field of view range was 20 mm x 12 mm. The post-processing of the visualization method was as follows Figure 2 As shown, first, the camera recorded a 10-second video of the CO2 bubble desorption process on the surface of the catalyst / packing. In this video, a region of interest (ROI, see Figure 1 ) was artificially defined for focusing on the desorbed bubbles above the catalyst. Then, the images extracted from the high-speed video were binarized to distinguish the bubbles from the background. Subsequently, the area of the bubbles in the ROI region was identified and measured, and by assuming that the bubbles were spherical, the volume of the bubbles in the ROI could be determined. In addition, the time for the bubbles to pass through the ROI was determined using the image sequence of the high-speed video, and combined with the outer surface area of the catalyst / packing, the CO2 desorption rate per unit area of the catalyst / packing could be determined.
[0057] In order to quantitatively analyze the CO2 desorption rate of the rich solution on the surface of different catalyst / packings, a high-speed video of the CO2 desorption process of the rich solution on the surface of the catalyst / packing in the range of 60-80°C for 10 seconds was recorded, and the high-speed video was processed to obtain 100 groups of CO2 bubble volume data of the rich solution desorbed in the ROI region at an interval of 0.1 s, as shown in Figure 3 Figure 3 In (a), catalyst 1 is represented; (b) represents catalyst 2; (c) represents catalyst 3; (d) represents ceramic saddle ring packing; (e) represents glass spring packing; (f) represents stainless steel saddle ring packing; (g) represents stainless steel screen packing; and (h) represents glass ball.
[0058] From Figure 3 It can be seen that the CO2 bubble volume data points in the ROI region of different kinds of catalysts / fillers are uniformly dispersed around a certain value at different temperatures. Taking catalyst 1 data as an example, when the desorption temperature is in the range of 60-70℃, the CO2 desorption amount is low, and the average CO2 bubble volume in the ROI region is 3.67*10 -5 mL~1.52*10 -3 mL. When the temperature continues to rise to 75℃ and 80℃, the average CO2 bubble volume is 7.66*10 -3 mL and 1.25*10 -2 mL, and the data fluctuates mainly due to the density of bubbles and the occurrence of occasional large bubbles, but the CO2 bubble volume data still fluctuates around the average value. It shows that the visualization method for measuring the CO2 desorption rate per unit area of the catalyst surface is accurate and reliable.
[0059] Based on the same inventive concept, the embodiment of the present application relates to a visualization method for measuring the CO2 rich liquid desorption rate, which can be realized by the visualization measuring device described above. For details, reference can be made to the related description above, which will not be repeated here. Figure 4 The flowchart of the visualization method for measuring the CO2 rich liquid desorption rate of the embodiment of the present application.
[0060] As Figure 4 shown, the method comprises the following steps S401 to S406:
[0061] Step S401, obtaining a CO2 desorption video of a catalyst / filler surface.
[0062] Step S402, extracting a CO2 desorption image of a predetermined ROI region from the CO2 desorption video.
[0063] Step S403, performing a binaryzation processing on the CO2 desorption image to distinguish the bubbles in the CO2 desorption image from the background.
[0064] Step S404, measuring the area of the bubbles in the ROI region based on the binaryzation-processed CO2 desorption image.
[0065] Step S405, calculating the volume of the bubbles in the ROI region based on the area of the bubbles in the ROI region.
[0066] Step S406, determining the time of the bubbles passing through the ROI region based on the image sequence in the CO2 desorption video, and combining the external surface area of the catalyst / filler and the volume of the bubbles in the ROI region to calculate the CO2 desorption rate per unit area of the catalyst / filler.
[0067] The visual measurement method of the CO2 rich liquid desorption rate of the embodiment of the application records the CO2 bubble size desorbed from the catalyst surface and the time through the ROI (region of interest) area through a video acquisition device, and calculates the CO2 desorption rate of the catalyst per unit area, which is more accurate in quantitatively measuring the enhanced rich liquid desorption CO2 performance of the catalyst. The device can avoid the interference from the CO2 generated from the non-catalyst surface in the traditional measurement method, and is a new method that can directly measure the CO2 formation / growth rate of the catalyst surface.
[0068] In some embodiments, the CO2 desorption rate per unit area of the catalyst / filler is calculated by formula (1):
[0069]
[0070] wherein v CO2 / area is the CO2 desorption rate per unit area of the catalyst / filler, V CO2 is the bubble volume in the ROI area, V m is the standard state gas molar volume, Δt is the time of the bubble passing through the ROI area, S packing is the outer surface area of the catalyst / filler.
[0071] In some embodiments, the CO2 desorption video of the catalyst / filler surface is acquired, including: acquiring the CO2 desorption video of different catalyst / filler surfaces at different temperatures.
[0072] The CO2 desorption rate per unit area of the catalyst / filler is calculated, including: calculating the CO2 desorption rate per unit area of different catalyst / fillers at different temperatures.
[0073] It can be understood that the above embodiments are only exemplary embodiments for illustrating the principles of the application, and the application is not limited thereto. Various modifications and improvements can be made by those of ordinary skill in the art without departing from the spirit and essence of the application, and these modifications and improvements are also considered to be within the protection scope of the application.
Claims
1. A visual measurement device of CO2 rich liquid desorption rate, characterized in that, The device comprises: a reaction container for containing catalyst / filler and ethanolamine MEA solution; a video acquisition device arranged on one side of the reaction container, for acquiring CO2 desorption video of the catalyst / filler surface in the reaction container; a processor electrically connected with the video acquisition device, for extracting CO2 desorption images of a predetermined ROI region from the CO2 desorption video; performing binaryzation processing on the CO2 desorption images to distinguish bubbles in the CO2 desorption images from the background; measuring the area of the bubbles in the ROI region based on the binaryzation-processed CO2 desorption images; calculating the volume of the bubbles in the ROI region based on the area of the bubbles in the ROI region; and determining the time for the bubbles to pass through the ROI region based on the image sequence in the CO2 desorption video, and combining the external surface area of the catalyst / filler and the volume of the bubbles in the ROI region to calculate the CO2 desorption rate per unit area of the catalyst / filler; The CO2 desorption rate per unit area of the catalyst / filler is calculated by formula (1): wherein, is the CO2 desorption rate per unit area of catalyst / packing, is the volume of gas bubbles within the ROI region, V m is the standard state molar volume of gas, is the time for the gas bubble to pass through the ROI region, is the external surface area of the catalyst / packing.
2. The apparatus of claim 1, wherein, The device further comprises a light-emitting diode panel with a light diffusing plate; The light-emitting diode panel and the video acquisition device are arranged on the two sides of the reaction container respectively, and the light diffusing plate is clamped between the light-emitting diode panel and the reaction container.
3. The apparatus of claim 1, wherein, The video acquisition device adopts a digital camera.
4. The device of any one of claims 1 to 3, wherein, The horizontal center line of the video acquisition device and the catalyst / filler are at the same height.
5. The device of any one of claims 1 to 3, wherein, The reaction container adopts a jacketed beaker; the device further comprises a circulating heating assembly, which comprises a pumping element, a circulating pipe and a heating element; The first end of the circulating pipe is in communication with the bottom sidewall of the jacketed beaker, the second end of the circulating pipe is in communication with the top sidewall of the jacketed beaker, and the pumping element and the heating element are sequentially arranged in the circulating pipe.
6. The apparatus of claim 5, wherein, The circulating heating assembly further comprises a temperature detection element, which is inserted into the jacketed beaker.
7. The device of any one of claims 1 to 3, wherein, The ethanolamine MEA solution is 250 ml of 5M MEA solution with a CO2 loading of 0.47 mol CO2 / mol MEA.
8. A method for visualizing the desorption rate of CO2 rich liquid, characterized by, The method comprises: acquiring CO2 desorption video of the catalyst / filler surface; extracting CO2 desorption images of a predetermined ROI region from the CO2 desorption video; performing binaryzation processing on the CO2 desorption images to distinguish bubbles in the CO2 desorption images from the background; measuring the area of the bubbles in the ROI region based on the binaryzation-processed CO2 desorption images; calculating the volume of the bubbles in the ROI region based on the area of the bubbles in the ROI region; determining the time for the bubbles to pass through the ROI region based on the image sequence in the CO2 desorption video, and combining the external surface area of the catalyst / filler and the volume of the bubbles in the ROI region to calculate the CO2 desorption rate per unit area of the catalyst / filler; The CO2 desorption rate per unit area of the catalyst / filler is calculated by formula (1): wherein, is the CO2 desorption rate per unit area of catalyst / packing, is the bubble volume within the ROI region, V m is the standard state gas molar volume, is the time for the bubble to pass through the ROI region, is the external surface area of the catalyst / packing.