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The Accelerating Rate Calorimeter 254 provides adiabatic calorimetry data in a safe, controlled laboratory environment. This information helps provide a sound understanding of the fundamental physical processes involved. From this understanding, various safe operating systems and procedures can be developed to mitigate the hazards posed by a reactive system.
The model 254 simultaneously measures temperature and pressure. The sealed pressure system also allows the user to evaluate the effect of different gas atmospheres on the thermal stability of the system.
Gaseous reaction products may be analyzed at the end of an experiment to help identify and understand the reaction mechanisms involved.
The Accelerating Rate Calorimeter 254 is designed to model the course of a large-scale reaction on a small scale. A test material is externally heated in a fixed volume until exothermic activity is detected. Keeping that sample in an adiabatic environment where no energy is lost, the calorimeter then measures and records the sample temperature and pressure.
A single experiment provides data for use in the following:
- Thermal Hazard Evaluation
- Pressure Hazard Evaluation
- Thermokinetic Analysis
User safety is a key objective in the design of model 254. The user is protected by a series of safety systems that are completely independent of the control system. These safety systems work to protect the user in the event that the primary control system fails. Fully computer-controlled and highly automated, this Accelerating Rate Calorimeter features a graphical interface that is easy to learn and use.
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APTAC 264 - Automatic Pressure Tracking Adiabatic Calorimeter
APTAC 264 takes the testing of chemical reactivity a step forward by enabling the user to acquire much faster temperature and pressure rise data than did the earlier
designs.
The instrument can function as:
- High-performance closed-cell adiabatic calorimeter
- High-temperature and high-pressure reaction calorimeter
- Open test cell from which effluent can be discharged and analyzed for emergency relief system studies using the DIERS methodology of the American Institute of Chemical Engineers
The precision and accuracy of APTAC 264 test results help companies in scaling up process designs to production scale by:
- Providing actual temperature and pressure data for use in kinetic modeling
- Validating predicted chemical reactions and scenarios
- Confirming predicted events following the activation of an emergency relief system
- Directly measuring physical property data of complex mixtures
APTAC 264 can be used for the thermal analysis of solid or liquid chemicals or for gas/liquid, liquid/liquid, gas/solid, and liquid/solid mixtures. It can also be used for process simulation of batch and semi-batch reactions, fire exposures, emergency relief venting, and physical properties measurement.
It offers a new degree of accuracy in reactivity data for chemical manufacturing industries, including organic chemicals, petrochemicals, pharmaceuticals, agrochemicals, fine organics, polymers and plastics, and explosive highenergy materials.
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Multi Modular Adiabatic Calorimeter MMC 274 Nexus™
The MMC 274 Nexus™ consists of two parts: the base unit with electronics and the exchangeable calorimeter module. This guarantees maximum flexibility.
Exchangeable calorimeter modules are available for different applications:
Accelerating Rate Calorimeter type module for safety testing
VariPhi™ module for fire exposure and other tests
External sample heater module for scanning tests
Special modules for battery testing
The MMC 274 Nexus™ can work in different testing modes. The scanning methods provide sensitivities comparable to Accelerating Rate Calorimeter tests in a fraction of the time it would take to run a Heat-Wait-Search test.
Scanning Mode
Constant temperature range
Constant power
Fire exposure
Isothermal
Adiabatic (Heat-Wait-Search)
Key Features of the MMC 274 Nexus™
Internal sample heater
Stirring of the sample
Injection of liquid sample
Venting of the sample bomb
Pressure measurement
Remote Calorimeter Options:
Humidity-controlled container
Refrigerated container
Explosion-proof container
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