The Linde LoTOx™ solution delivers the highest NOx removal capabilities commercially available, achieving efficiency rates in excess of 95 percent.

LoTOx has been successfully deployed across a wide range of combustion processes in manufacturing industries such as electric power plant boilers, chemical plants and a variety of exhaust streams, including gas and coal-fired boilers, lead recovery furnaces, stainless steel pickling operations, sulfuric acid regeneration plants, fluidized catalytic cracking (FCC) regenerators and pet coke boilers.

NOx, mostly NO and NO2, is among the major pollutants listed under the EPA’s Clean Air Act. In atmospheric sunlight, NOx reacts to form smog, acid rain, and ground-level ozone, especially in warm weather causing a variety of health issues. It also accumulates in the atmosphere with other greenhouse gases, contributing to climate change.

Low-temperature oxidation

“LoTOx is a low-temperature oxidation system that is an extremely effective way of managing harmful emissions,” said Peter Studer, Program Manager, Chemicals and Environment Industry for Linde LLC. “This flexible, end-of-pipe technology can be configured for efficiency levels between 30 percent and 95-plus percent.”

The Linde system employs ozone to oxidize nitrogen oxides (NOx) to higher oxides of nitrogen such as N2O5, thus eliminating the need to store hazardous chemicals required for traditional abatement processes.

“These oxides are not only very soluble but also reactive, so they can be easily removed along with other hazardous pollutants such as mercury using conventional wet or dry scrubbers used in air pollution control equipment,” Studer said.