Thanks for the follow up. The article informs the reader that AA is buying these blocks that are then buried and their carbon absorption is able to be monitored and measured. They don’t ever go anywhere near a plane.
The filters you are talking about are probably early attempts at ozone filtration. I don’t know much about the technology, but most airliners have ozone conversion, sometimes incorrectly called filtration, capability. The few that don’t these days, they may be dispatched at a different altitude to keep them out of a high-concentration ozone altitude. Here is a link to a paper that covers the topic and explains how altitude may affect ozone concentrations. For a fact FAA regulates how much ozone can be in the cabin air under 14CFR 25.832.
That is pretty far outside of my area of expertise, but because of the FAA regulations cabin ozone conversion is done by a lot of airliners. The A320 family of aircraft that I fly has ozone conversion equipment as an option and AA planes have it as I understand things. Here is a link to an article that Airbus published on cabin air quality. A lot of work has been done on the topic in the last few years. Again, carbon generation and reduction versus ozone and cabin air quality; two totally different subjects, but there is an intersection to the the degree that aircraft in general and airliners specifically are all getting a lot of attention with respect to both these days.