TDA RESEARCH, INC.

The combustion of fossil fuels, particularly coal, introduces large quantities of arsenic into the environment, much of which reaches natural waters. Acute arsenic poisoning results from ingestion of ...

Coal fired Gasifer Combined Cycles (GCC) have both high efficiency and very low emissions. A critical need for GCCs is a method of removing the H2S produced from the sulfur in the coal from the hot g ...

HEAVY OILS, INCLUDING RESIDUES FROM CRUDE OIL DISTILLATION (RESIDS), REPRESENT AN ABUNDANT ENERGY RESOURCE THAT IS NOT FULLY UTILIZED. IT HAS BEEN ESTIMATED THAT IF ONLY 20% OF THESE CRUDES COULD BE ...

Nitrogen oxides (NO and NOx, collectively referred to as NOx) are among the mostpervasive and difficult emissions to control. NOx emissions can be reducedsomewhat by combustion modification technique ...

Soils and groundwater contaminated with heavy metals are serious environmentalproblems. More than 70% of 358 Superfund hazardous waste dump sites arecontaminated with zinc, while chromium, copper, an ...

Coal is the largest source of power generation in the U.S.A. but its conbustionproduces SOx and NOx which must be removed from the flue gas. Current removaltechniques (limestone base Flue Gas Desulfu ...

Natural gas provided 30% of the energy consumed in the U.S. in 1992.Unfortunately, almost 25% of the U.S. gas reserves are contaminated with H2S.Due to its acidic nature and corrosivity, the H2S con ...

As demands for drinking water quality become increasingly stringent, new methodsfor educing contaminant levels to the low ppb range are being sought. Ofparticular concern is the reduction of trihalom ...

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