Chemistry of inorganic compounds – Nitrogen or compound thereof
Patent
1990-07-23
1991-12-31
Langel, Wayne A.
Chemistry of inorganic compounds
Nitrogen or compound thereof
422110, 422111, 422189, 423DIG5, C01B 2100, G05D 700
Patent
active
050770292
ABSTRACT:
Membrane or pressure swing adsorption systems are used for air separation, with the crude nitrogen stream obtained thereby passing to a catalytic combustion system for reaction of residual oxygen with hydrogen to produce a high purity nitrogen product. Excess hydrogen in the nitrogen product is minimized by controlling the amount of hydrogen employed based on the instantaneous crude nitrogen flow and purity, and adjusting hydrogen ingestion in response to nitrogen product purity feedback. Plant flow rate tracking control limits maximum rates of flow change to ensure stable operation.
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Fritschler Alvin H.
Langel Wayne A.
Union Carbide Industrial Gases Technology Corporation
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