Membrane/deoxo control method and system
US5077029A · kind A · utility
10Cited by
11References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1990 |
| Grant date | Dec 31, 1991 |
| Priority date | — |
| Expiry date | Jul 23, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S423/05
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.