Adiabatic Reaction Calorimetry

The Accelerating Rate Calorimeter 244 (ARC® 244), formerly known as TIAX ARC 3000, is designed to safely measure the amount and rate of heat release associated with the processing or storage of chemicals. 

This information is vital in developing and evaluating processes to ensure safe operation and to prevent thermal runaway which can have devastating effects.

The Accelerating Rate Calorimeter 244 (ARC® 244) technology is integral to designing inherently safer batteries as well as measuring energetic materials used in such products as explosives, propellants, and air bags.

Major Features and Benefits:

 

• Tube heater–reduces heat losses due to reflux

• Windows XP™ operating system standard

• Smaller footprint

• Lift mechanism for calorimeter top

• Experimental wizards for easy test set-up

• Power Compensation Module (optional)

• Increased safety and interlock features

The Accelerating Rate Calorimeter 254 (ARC® 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 Accelerating Rate Calorimeter 254 (ARC® 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 (ARC® 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, the Accelerating Rate Calorimeter 254 features a graphical interface that is easy to learn and use.


The system is totally integrated into clean, modern designs in which all routinely used equipment is easily accessible.

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.