Airborne carbon dioxide capture and concentration device
Wet-TSA atmospheric carbon dioxide capture and concentration equipment captures carbon dioxide in the air with a rotor. If it is applied to air conditioning ventilation and uses the exhaust air of the air conditioner, the exhaust air has a CO2 concentration about three times that of the outside air due to the CO2 from human breathing, so CO2 can be effectively captured. In addition, the air from which the CO2 has been removed has a CO2 concentration similar to that of the outside air, so when the outside temperature is particularly high or in particularly cold regions, comfort and energy saving can be improved by purifying and reusing the indoor air.
Carbon dioxide gas capture and dry ice production system
This system combines a device that compresses, cools, and liquefies the high-concentration carbon dioxide gas captured by the Wet-TSA airborne carbon dioxide capture device with a device that produces dry ice from the liquefied carbon dioxide gas.
Conventionally, carbon dioxide gas was recovered and used as a by-product from oil refineries and other facilities, but these facilities themselves are a source of carbon dioxide emissions. In addition, in the future, it is expected that traditional sources of high-concentration carbon dioxide will be depleted due to the reduction in plastics and petroleum fuels. Furthermore, in the conventional method, liquefied carbon dioxide gas is filled from oil refineries and other facilities into heavy high-pressure resistant containers and transported to areas where liquefied carbon dioxide is in demand, which increases carbon dioxide emissions, and this is also a problem.
Demand for dry ice is expected to increase in the future. It is necessary for the spread of frozen foods and the associated transportation. If a refrigerated transport vehicle is converted to an EV, the weight of the power battery for the refrigeration unit will also increase. If dry ice is loaded instead of the refrigeration power battery or refrigeration unit, the load weight of frozen goods can be increased and the return journey will be lighter, making it possible to transport more refrigerated foods. Dry ice will also be needed for individual transportation of frozen and refrigerated goods by drones, which are expected to become more common in the future. Dry ice production systems that use air as a carbon dioxide source can be installed on remote islands, so locally produced dry ice could revolutionize the distribution of local products in remote islands and other areas where sales have been difficult until now.
Since the dry ice production system generates and uses liquefied carbon dioxide, it is also possible to supply liquefied carbon dioxide for purposes other than dry ice. If technology is developed to convert carbon dioxide into fuel or other valuable materials, factories could be able to procure their own carbon dioxide by introducing this system.
Ingenuity to improve the efficiency of the entire system
In addition to the Wet-TSA carbon dioxide capture and concentrator, dry ice production systems that use air as a carbon dioxide source have many features to further improve the energy efficiency and capture efficiency of the entire system.
1. Exhaust heat generated within the system and exhaust heat from district cooling are used as the heat source to drive the carbon dioxide capture and concentrator.
2. When the captured CO2 gas is liquefied, CO2 gas containing air mixed in as an impurity is produced, but this gas is reused to improve the performance and efficiency of the carbon dioxide concentration capture and concentrator.
