W. H. Henstock is a project scientist with Union Carbide Corporation. He works in Hydrocarbons Research and Development at the Union Carbide Technical Center in South Charleston, West Virginia. He received a BS in chemical engineering from Carnegie-Mellon University, and a PhD in chemical engineering from the University of Illinois.
NOx in the cryogenic hydrogen recovery section of an olefins production unit
Article first published online: 17 JUN 2004
Copyright © 1986 American Institute of Chemical Engineers
Volume 5, Issue 4, pages 232–237, October 1986
How to Cite
Henstock, W. H. (1986), NOx in the cryogenic hydrogen recovery section of an olefins production unit. Plant/Oper. Prog., 5: 232–237. doi: 10.1002/prsb.720050411
- Issue published online: 17 JUN 2004
- Article first published online: 17 JUN 2004
Union Carbide has been investigating the fate and possible hazards of NOx compounds in cryogenic gas separation equipment. It has been learned that trace amounts of NOx in the process streams can accumulate in the equipment under certain conditions. Although mixtures of condensed NOx and condensed hydrocarbons can be ignited with a strong ignition source, the combination does not seem to present an imminent hazard. No explosive NOx-hydrocarbon “gums” have been found yet, but the investigation is still continuing. We recommend that equipment which is exposed to NOx compounds be monitored to detect accumulations and prevent possibly hazardous situations.