Title

Flammability limits and burning velocities of ammonia/nitric oxide mixtures

Document Type

Article

Publication Date

1-1-1995

Publication Title

Journal of Loss Prevention in the Process Industries

Volume

8

Issue

4

First Page

215

Keywords

burning velocity, flammability, nitric oxide

Last Page

220

Abstract

The potential explosion hazard of mixtures containing ammonia and nitric oxide was investigated in a constant-volume preheated test cell. Ammonia/air and ammonia/nitric oxide mixtures were centrally spark-ignited in the cell at initial temperatures from 25 to 220°C and initial pressures from 101 to 450 kPa. The ammonia/air mixtures produced the expected results for flammability limit, agreeing well with values from the literature. The ammonia/nitric oxide mixtures are capable of producing powerful explosions with laminar burning velocity over 1 m s-1 and a pressure rise over ten times the initial pressure. Also, when mixing nitric oxide, oxygen and ammonia, it was found to be possible to produce mixtures which reacted and self-ignited on mixing. The paper presents flammability limits and burning velocities as functions of temperature, pressure and gas concentration. © 1995.

DOI

10.1016/0950-4230(95)00027-X

ISSN

09504230

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