Historically, coal has been used for 30-45% of the U.S. Electrical Generation portfolio. Most coal seams contain contaminants, including one common contaminant that includes Sulfur compounds that exist as inorganic, organic and inorganic Sulfur. Minerals like pyrite, chemically named Iron Sulfide or “Fool’s Gold”, can be mechanically separated at coal preparation plants. However, organically bound and elemental Sulfur remain within the coal structure. This Sulfur is released upon combustion and oxidizes into Sulfur Dioxide.
The Clean Air Act Amendments of 1990 introduced new scrubbing technology used by many coal-fired utilities to remove Sulfur Dioxide from their emissions in effort to reduce acid rain. These scrubbers produce high quality and very pure Flue Gas Desulfurization Gypsum—a process that removes Sulfur Dioxide gas that creates Gypsum. This is done through a wet process that first forms Calcium Sulfite Hemihydrate, which is then oxidized into Gypsum or Calcium Sulfate Dihydrate and dewatered.
However, after correcting the environmental problem in acid rain, there has been a decrease in the amount of available atmospheric deposits of Sulfur on agricultural land.
See below to get a sense of the numbers of Sulfur deficiencies in the field that have been occurring more often in the past 15-20 years.
SUL4R-PLUS™ takes the Gypsum produced and transforms it into a pelletized product with superior handling characteristics and exceptional crop performance. SUL4R-PLUS™ fertilizer products sustainably re-establish the connection of plant available Calcium and Sulfur between Coal and Agriculture.
For more information on SUL4R-PLUS™ fertilizer products