Electric Power Research Institute Incorporated

Joseph Edward Cichanowicz

Lawrence J Muzio

Patrick Maroney

The present invention relates to a selective catalytic reduction (SCR) reactor assembly for removing fine particles that interfere with SCR catalyst activity in biomass fuel applications. The selective catalytic reduction (SCR) reactor assembly includes at least one turning vane disposed in a plenum chamber of the reactor, at least one rectifier layer disposed downstream of the at least one turning vane, and at least one active catalyst layer for removing particulate matter. The turning vane is adapted to impart a directional turn to the flue gas flowing through the reactor, and the at least one rectifier ensures even flow distribution.

Selective catalytic reduction (SCR) reactor assembly to remove fine particles from poisoning or interfering with SCR catalyst activity in biomass fuel applications

A process is provided for removing nitrogen oxides and sulfur dioxide from gaseous mixtures in the presence of a metal chelating agent. These gaseous contaminants are converted to hydroxylaminedisulfonates which are decomposed to ammonium ions and sulfate ions at pH of 4.2 or less. This decomposition step also converts the metal ion of the metal chelating agent to a reusable form. The ammonium ions are separated by column sorption, eluted and thermally reacted with nitrogen oxides to form nitrogen and water. The sulfate ions are removed as a sulfate salt precipitate.

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Saratoga, CA, United States of America

Joseph Edward Cichanowicz