Engelhard Minerals & Chemicals Corporation

George W Roberts

Saul G Hindin

Leon M Polinski

Ronald Marshall Heck

Robert V Carrubba

A catalyst system capable of operating at very high temperatures is disclosed. The catalyst is divided into upstream and downstream portions, the upstream portion being protected against both thermal conductivity and radiant heat transfer from the downstream portion. Advantageously, the upstream portion may use a more active catalyst composition then the downstream portion.

Catalyst system

A process for exchanging isotopes of hydrogen, particularly tritium, between gaseous hydrogen and water is provided whereby gaseous hydrogen depeleted in tritium and liquid or gaseous water containing tritium are reacted in the presence of a metallic catalyst.

Process for exchanging hydrogen isotopes between gaseous hydrogen and

A catalyst system capable of operating at very high temperatures is disclosed. The catalyst is divided into upstream and downstream portions, the upstream portion being protected against both thermal conduction and radiant heat transfer from the downstream portion. Advantageously, the upstream portion may use a more active catalyst composition than the downstream portion.

A method for combusting nitrogen-containing fuel by: combusting a first fuel-air mixture in the presence of a catalyst in a first stage, operated fuel-rich so that the amount of air in the first stage is substantially less than the amount needed for complete combustion; adding additional air to the effluent gas from the first stage to form a second mixture with an amount of air at least sufficient to combust fully the effluent from the first stage; and then combusting the second mixture in a second stage. The first mixture is sufficiently fuel-rich, and the second mixture contains sufficient additional air, so that the combustion temperature in the first stage is below a temperature that would result in any substantial formation of oxides of nitrogen or other fixed nitrogen compounds from atmospheric nitrogen present in the mixture being combusted, and the second stage temperature also is below that for substantial nitrogen oxide formation therefrom. The method serves to suppress formation of nitrogen oxides from the nitrogen-containing compounds in the fuel.

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Westfield, NJ, United States of America

George W Roberts