Cleaner coal power

A licensing agreement recently signed by the US Department of Energy and Johnson Matthey will contribute to the reduction of mercury and other trace elements emitted from coal gasification and coal-fired power plants.

The agreement between Johnson Matthey and the Office of Fossil Energy's National Energy Technology Laboratory (NETL) paves the way for the company to demonstrate a mercury-reduction process patented by two NETL researchers and to ultimately commercialise the process.

Johnson Matthey plans to demonstrate the process at larger bench- and pilot-scales to the point that it can be commercially sold to utility and related industries.

The process, patented as a ‘Method for High-Temperature Mercury Capture from Gas Streams,’ enables scientists to remove mercury from high-temperature gases by using metal sorbents to capture the mercury, as well as the trace elements arsenic and selenium. Once they capture the trace elements, the sorbents can be regenerated and used again in gas streams, primarily from coal gasifiers, coal-fired electric plants, and ore smelters.