Kansai Electric Power has filed a patent for a CO2 recovery unit that utilizes a CO2 absorber to remove CO2 from a gas with low CO2 concentration. The unit includes multiple CO2 absorption sections and absorbent circulation lines to enhance the efficiency of CO2 absorption. A discharged solution from the first circulation line is supplied to the second circulation line. GlobalData’s report on Kansai Electric Power gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Kansai Electric Power, reformer integrated fuel cells was a key innovation area identified from patents. Kansai Electric Power's grant share as of June 2023 was 1%. Grant share is based on the ratio of number of grants to total number of patents.

Co2 recovery unit with multiple absorption sections and circulation lines

Source: United States Patent and Trademark Office(USPTO). Credit: The Kansai Electric Power Co Inc

A recently filed patent (Publication Number: US20230191314A1) describes a CO2 recovery unit and method for efficiently removing CO2 from gas. The unit includes a CO2 absorber that uses a CO2 absorbent to remove CO2 from a gas with low CO2 concentration. The absorbent regenerator then performs a heat exchange between the absorbed CO2 and water vapor to regenerate the absorbent. The unit also includes a rich solution supply line that discharges the CO2-absorbed solution from the absorber and supplies it to the regenerator, as well as a lean solution supply line that supplies the released CO2 absorbent to the absorber.

What sets this CO2 recovery unit apart is the inclusion of multiple CO2 absorption sections within the absorber. Specifically, there are at least two absorption sections, with the second section located below the first. This design allows for more efficient CO2 removal. Additionally, the unit includes a first absorbent circulation line that supplies the absorbent from the first absorption section to the upper side of that section, and a second absorbent circulation line that does the same for the second absorption section. An absorbent discharge line is also present to discharge a portion of the first circulation solution to the second circulation line.

The patent also describes a CO2 recovery method that follows a similar process. The method involves bringing a gas with low CO2 concentration into contact with a CO2 absorbent in a countercurrent manner to remove CO2. The absorbent is then regenerated through a heat exchange with water vapor. The method also includes the use of multiple CO2 absorption steps, with the second step following the first. Similar to the unit, the method involves the circulation of the absorbent between the absorption steps and the discharge of a portion of the absorbent from the first circulation step to the second circulation step.

Overall, this patent presents a CO2 recovery unit and method that aim to efficiently remove CO2 from gas. By incorporating multiple absorption sections and circulation lines, the unit and method offer improved CO2 removal capabilities. This technology could have significant implications for industries seeking to reduce their carbon footprint and mitigate the effects of climate change.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.