1.DACair capture extractionCO2Presentation

Direct air carbon capture (Direct Air Capture, shortDAC) is a technology that extracts carbon dioxide directly from the atmosphere.

2.DACair capture extractionCO2the prospect

This carbon dioxide extracted from the atmosphere can be used in a variety of different ways as part of a circular economy. In the future, it can be used as a raw material for non-fossil-based plastics for long-term storage. It can also be used to produce fully synthetic fuels, also knowneFuels. Carbon dioxide can also be combined with hydrogen to form methanol and make synthetic fuels.

3.DACair capture extractionCO2The working principle
To extract carbon dioxide from the atmosphere, the large particles of pollutants in the ambient air are first removed and then introduced into a pebble-like filter material. The carbon dioxide deposited there is then extracted from the material and collected in highly purified form for later use as a starting material. Finally, water is discharged as a potential by-product of the process.

4.DACair capture extractionCO2The current technology

DACTechnology is mainly divided into liquidDACTechnology and SolidsDACTwo broad categories of technology.

LiquidDACincluding through a chemical solution to remove anyCO2

① Alkaline hydroxide solutionDACThe technical absorption rate is fast, but the regeneration temperature is as high900C, high regeneration energy consumption, and accompanied by a large amount of water loss;

② Amine solutionDACThe technical absorption rate is high, but there is toxic medium volatilization and the regeneration efficiency is low;

③ Amino acid salt solution/BIGschange with alkalinity concentrationDACtechnology is an emerging technology, both have a faster absorption rate and lower regeneration temperature, but the amino acid salt solution/BIGsDACThe effect depends onBIGsType and structure, change of alkalinity concentrationDACThe effect is associated with the solution concentration technique;

in solidDACin,CO2Captured in filtration systems

① Solid base(Soil)MetalDACThe regenerative energy consumption of the technology is higher,DACThe effect will be due to the selected alkali.(Soil)There is a big difference in different metal types;

Solid amine adsorbentDACThe technical adsorption rate is fast and the regeneration temperature is low, but the thermal stability of the adsorbent needs to be further improved;

③MOFsMaterialsDACThe effect is greatly affected by the water content in the environment, but less affected by temperature.DACTechnical regeneration temperature and regeneration energy consumption is low, but the water quality and water quantity requirements are high, and the resulting.CO2Lower partial pressure requires further compression;

④DACcombined methanation(DACM)technology by introducing a catalyst to the trappedCO2withH2directly in300~350C efficiently convertedCH4and less affected by humidity;

⑤ Light-induced swing adsorption andMI-DACThe technology is in the initial stage of research, and it seems that the renewable energy consumption is low and very economical.

DACair capture extractionCO2the cost

Compared to other carbon capture technologies,DACThere are no geographical restrictions on the technology, which can place the capture point and the storage point in one place, reducing transportation costs and solving many problems in the transportation and construction industries.CO2emissions from distributed sources, but also to avoid adsorption/Absorbent performance by high concentration of pollutants in flue gas(SuchNOx、SOxWait)The impact, thereforeDACIt is considered to be a promising carbon capture technology.

Here, let's recommend a company agent test.CO2of the sensorNG2-A-7This sensor is Italian.NovasisSpecifically for detectionCO2Research and development of infrared spectrum sensor.

NG2-A-7Overview

Novagas2Gas sensors are innovative measurement modules for detectionCO2、CO、N2O、CH4and related hydrocarbons. can be usedOEMThe components are easily integrated in control, measuring systems and monitoring instruments. The sensor uses dual-channel non-dispersive infrared detection (NUMBER) Principle to detect the net increase and decrease at the light absorption wavelength of the target gas. The light intensity is related to the gas concentration. In addition, temperature compensation is required to ensure reliable and stable measurements. The gas cell adopts non-sequential ray tracing technology to ensure the best compromise between accuracy and sensor size. It has also been achieved with a proprietary robust housing that minimizes the effects of corrosion in harsh industrial environments.Novagas2The electronic board is a native wireless module with ultra-low power technology management, or an error diagnosis system and a power module suitable for managing charging and energy recovery systems.Novagas2It is also possible to manage pneumatic pumps for forced ventilation, or to work simply by natural diffusion.

NG2-A-7The parameters

Operating range:0-1000ppm

Operating temperature:0°C ~ 50°Clinear compensation

Operating humidity:0-95%RH(non-condensing)Uncompensated

Working pressure:800-1150hPaUncompensated

Communication mode:UART

Communication protocol: baud rate9600 (Default) - 19200 - 38400

Input power supply:9-24VDC,Reverse polarity protection

Output signal:4-20mA，0-5V，UART

Precision size: ±1% FS

Storage temperature:-40°C ~ 85°C

Estimated life:>5 Year

3.NG2-A-7The structure

Novagas2The transmission board is allNG2Model universal plate, wide56mm x 48mm. There are three holes (black in the picture belowcolor) to fix the board according to customer demand.

Novagas2The sensor has two fittings. The measurement performance of the sensor is best if the gas flows in a certain direction in the gas cell. Look from the topNovagas2Sensors,WEIDMULLER(Orange) The connector is located at the bottom, the nozzle on the right is the air inlet, and the one on the left is the air outlet. The following figure shows the air intake/The position of the gas outlet, the reference gas unit and the direction of the orange connector, the model of these two ports depends onNovagas2Model of the sensor.

For details, please consult。