CATALYTIC PROCESS FOR CONTROL OF NOX EMISSIONS USING HYDROGEN

摘要

A selective catalytic reduction process with a palladium catalyst for reducing NOx in a gas, using hydrogen as a reducing agent. A zirconium sulfate (ZrO2)SO4 catalyst support material with about.01 - 2.0 wt.% Pd is applied to a catalytic bed positioned in a flow of exhaust gas at about 70 - 200°C. The support material may be (ZrO2-SiO2)SO4. H2O and hydrogen may be injected into the exhaust gas upstream of the catalyst to a concentration of about 15 - 23 vol.% H2O and a molar ratio for H2 / NOx in the range of 10 - 100. A hydrogen-containing fuel may be synthesized in an Integrated Gasification Combined Cycle power plant for combustion in a gas turbine to produce the exhaust gas flow. A portion of the fuel may be diverted for the hydrogen injection