A new technology for controlling the partial pressure of CO
2
(pCO
2
) in a plant growth chamber (PGC) has been demonstrated. CO
2
is gathered from the source atmosphere across a membrane gas exchanger and stored in an alkanolamine solution. The CO
2
loading of the alkanolamine reservoir is monitored using specific conductance and controlled by the exposure time and temperature. The PGC pCO
2
is maintained using a second membrane exchanger through which the alkanolamine circulates, absorbing or releasing CO
2
to maintain equilibrium. The equilibrium pCO
2
is determined by the CO
2
loading and the temperature. Constant PGC feed pCO
2
levels of roughly 1000 ppm have been maintained using sources with pCO
2
both above and below this value.
Purchase more technical papers and save! With TechSelect,
you decide what SAE Technical Papers you need, when you need them, and how much you want to pay.
Learn more >
