Spacesuit CO2 Scrubber: Sorbent Breakthrough Front (2D)

This is the 2D finite-difference counterpart to the 3D instanced-granule scrubber model: the same real fixed-bed adsorption physics — a Langmuir isotherm and linear-driving-force rate law integrated along the bed's flow axis — rendered as a live saturation heatmap and a breakthrough curve instead of a 3D particle field. Dial the astronaut's inlet CO2 concentration, the purge gas flow rate and the bed length, compare a fresh bed against a degraded one, and watch the outlet CO2 concentration trace stay flat until the mass-transfer zone reaches the outlet and the curve breaks upward.