Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
8614776
Reference Type
Journal Article
Title
147. The thermal decomposition of phosphine by tungsten and molybdenum
Author(s)
Melville, HW; Roxburgh, HL
Year
1933
Is Peer Reviewed?
Yes
Journal
Journal of the Chemical Society
ISSN:
0368-1769
Page Numbers
586-595
Language
English
DOI
10.1039/JR9330000586
Abstract
The decomposition of phosphine has been studied on the surface of tungsten and molybdenum filaments at pressures from 0.01 to 300 mm. Reaction velocity is measurable at about 500°. On tungsten, the order of the reaction is nearly unity and is not much affected by pressure. On molybdenum, the decomposition is unimolecular at low pressures but becomes of zero order as the pressure is increased. The heat of adsorption of the phosphine has been calculated from the temperature coefficient of the reaction at high and at low pressures. The products of the reaction are red phosphorus and hydrogen. Molecular hydrogen has no effect. These reactions have been compared with the corresponding ammonia reactions. A simple method of correcting for end losses in a hot filament is described.
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity