5 A new generation of wet FGD systems, pioneered in the mid to late 1990's, improved mass transfer, which resulted in the usage of more compact absorbers that are estimated to require 50 percent less material, compared to an older generation of wet FGD systems.
The newer wet FGD systems had a negative effect on mass transfer when they first came out.
mnli hypothesis: The newer wet FGD systems had a negative effect on mass transfer when they first came out. premise: 5 A new generation of wet FGD systems, pioneered in the mid to late 1990's, improved mass transfer, which resulted in the usage of more compact absorbers that are estimated to require 50 percent less material, compared to an older generation of wet FGD systems.