The mechanic

A sorbent bed gains mass as it adsorbs, so loading is drawn as type weight — 640 weight units per mmol of CO2 per gram, one constant across the site. The index is one temperature-vacuum swing: 100 fresh, 860 at breakthrough, and back to 139 rather than 100, because of the heel.

The control case. /columns/blank/ — same vessel, same air, no sorbent: every heading at weight 100, every plate empty, measured spread 0.0.