Thermal hazard and safety relief of benzaldehyde oxime
| Autor: | Jiping Deng, Liping Chen, Shunyao Wang, Wanghua Chen, Ya-Dong Yao |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
021110 strategic
defence & security studies Order of reaction Chemistry General Chemical Engineering Thermal decomposition 0211 other engineering and technologies Energy Engineering and Power Technology Thermodynamics 02 engineering and technology Management Science and Operations Research Oxime Combustion Decomposition Industrial and Manufacturing Engineering Calorimeter Benzaldehyde chemistry.chemical_compound 020401 chemical engineering Control and Systems Engineering Organic chemistry 0204 chemical engineering Safety Risk Reliability and Quality Adiabatic process Food Science |
| Zdroj: | Journal of Loss Prevention in the Process Industries. 46:137-142 |
| ISSN: | 0950-4230 |
| DOI: | 10.1016/j.jlp.2017.01.006 |
| Popis: | Benzaldehyde oxime is an important pharmaceutical and agrochemical intermediate, which releases a huge amount of heat under runaway condition. It has a low initial decomposition temperature, and may cause accidents without proper temperature control during production and storage. Thermal hazards of benzaldehyde oxime were investigated by using a high-performance adiabatic calorimeter (PHI-TECII) in order to understand its thermophysical properties. The results showed that benzaldehyde oxime would suffer from thermal decomposition until 381.86 K, the adiabatic temperature rise (Δ T ad ) and specific heat release ( q ’) were 279.65 K and 548.1 J g −1 , respectively. Furthermore, non-linear fitting was performed on data obtained from the PHI-TECII tests, the activation energy ( E) and reaction order (n) of this decomposition was obtained as 176.24 kJ mol −1 and 2.2. The self-accelerating decomposition temperature (SADT) of the standard packages of 25 kg was calculated to be 323.07 K, indicating that the probability of combustion and explosion caused by runaway during the thermal decomposition is high. Benzaldehyde oxime could thus be classified as an autoreactive substance. The pressure-controlled and temperature-controlled bottom relief areas calculated by the Boyle’ s Law and the Tangren' s Law were 4.51 × 10 −4 m 2 and 0.43 × 10 −4 m 2 , respectively. For untempered hybrid system, the employment of temperature-controlled bottom relief is more effective. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect