How does ASTM D6866 account for variability in feedstock used as fuel?
The variability is not accounted for by ASTM D6866 but by the sampling method ASTM D7459. Given that the feedstock proportions will continually change, continuous collection of CO2 (via a controlled flow meter at the exit of a CEMS or stack probe) will give the true running average for a specific collection period (e.g. 1 week, 1 month).
