Proton exchange membrane fuel cells (PEMFCs) with a dead-ended anode and cathode can reach high hydrogen and oxygen utilization by a relatively simple system.
Try to reach higher levels.
However, to reach high CO2 capture efficiencies (⩾95%), oxygen carrier inventories in fuel reactor higher than 600 kg/MWth were needed with the lignite.
Moreover, with this type of vascular access, as blood with high oxygen saturation reaches the pulmonary artery, the shunt fraction of the natural lung usually increases due to the loss of hypoxic vasoconstriction [ 16].
When the cells are exposed to the air, high oxygen transfer rates can be reached, while the cells can take up substrate and excrete the produced fumaric acid when they are submerged.
The mean percent dissolved oxygen was similar in all the environments, reaching higher than 50%% on both the summer and winter sampling dates (Table 2).
Until the late 90s, the 50 km long reach of the Seine inside Paris was permanently affected by high oxygen consumption accounting for 112% of the flux upstream of the city.
