| Document ID (ISN) | 112345 |
| CIS number |
12-0228 |
| Year |
2009 |
| Convention or series no. |
RR 710
|
| Author(s) |
Véchot L.N., Hare J.A.
Health and Safety Executive |
| Title |
Assessment of the applicability of Dewar tests for screening hazardous waste treatment |
| Bibliographic information |
HSE Books, P.O. Box 1999, Sudbury, Suffolk CO10 2WA, United Kingdom, 2009. vi, 77p. Illus. Bibl.ref. |
| Internet access |
Assessment_of_the_applicability_[INTERNET_FREE_ACCESS] [in English]
|
| Abstract |
In the waste treatment sector, the exothermic reaction incompatibility of mixtures is often determined by recording the temperature rise after mixing samples in a beaker. Instead, the use of non-pressurized Dewar vessels has been proposed by some parts of the industry as an improvement, because their cooling rates and heat losses are closer to bulk containers. Temperature rises of between 6-10°C in the Dewar vessel over a period of 10 minutes have been suggested by the industry to indicate an exothermic reaction of concern, with gas bubblers being used to indicate any gas generation. Specialist inspectors have questioned the validity of these test methods for scale-up to large volumes. The objective of this work was therefore to investigate the range of applicability of the proposed technique. It was found, in particular, that the proposed ten-minute timescale could be insufficient to detect a runaway reaction. A number of other limitations to scale-up are discussed. |
| Descriptors (primary) |
United Kingdom; exothermic mixtures; exothermic reactions; hazard evaluation; experimental determination; disposal of harmful waste |
| Descriptors (secondary) |
reliability; public OSH institutions; glossary; report; description of technique |
| Document type |
E - Books, reports, proceedings |
| Country / State or Province | United Kingdom |
| Subject(s) |
Environmental pollution
|
| Broad subject area(s) |
Chemical safety
Fires, explosions and major hazards
|
| Browse category(ies) |
Waste collection and disposal
|
