Simular | Heat-Flow Reaction Calorimeter with Online Result Display

Running a chemical process safely requires a thorough
understanding of the main reactions and any possible, unintended,
side reactions or decompositions.

Reaction calorimetry evaluates the main reactions. From this,
operating conditions can be optimized to mitigate the hazards

Phases of a Thermal Runaway

Figure 6 Thermal Runaway of reaction


(1) Thermal properties of the desired reaction
(2) Thermal runaway of the reaction

Thermal properties of the desired reaction (1)

The Simular measures the energy evolved in the
reaction. Subsequently, this enables you to calculate
the plant cooling capacity required to keep the
reaction isothermal (Tp).

Thermal runaway of the reaction (2)

In the event of plant failure, it is critical to understand
the maximum temperature the main reaction will
reach during any subsequent thermal runaway.

The Simular enables the Maximum Temperature of
Synthesis Reaction (MTSR) to be calculated from the
data of the reaction. Multiple reaction conditions can
also be screened to help understand the kinetics of
the reaction. From this, it can be assessed whether
there will be sufficient time and emergency cooling
capacity to deal with the temperature increase.

Minimizing the risk

Hazard assessments may highlight insufficient plant
emergency capacity to avert the risk of thermal
runaway. The Simular can be used to explore and
design safer reaction conditions, thereby facilitating
the optimization of safe operations and minimizing
process risk.


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The system is designed to closely match your plant conditions, then integrate them into a bench-scale system that is simple to operate and that provides data effortlessly. Typical design features that can be customized include temperature range, agitator type, stirring speed, reagent feed rate and even reactor geometry. It is widely regarded as the best, most flexible, reaction calorimeter available.

Multiple calorimetric methods

The Simular is designed to be used by both research chemists and safety specialists and this is claim is based around the technical features of the system. In particular, the Simular uses power compensation calorimetry as one of the techniques, unique to the Simular, and this allows accurate determination of heat release without the need for time-consuming calibration or complex calculation procedures.
Also heat flow calorimetry data, essentially the classic method traditionally used, is also supported as standard.

Safe process scale-up

One of the most important uses of reaction calorimetry is to scale-up stirred reactions safely and quickly. This is related to the fact that the Simular reports the rate of heat release as the reaction proceeds and if this rate is matched on the plant, safe operation is assured. The heat release rate directly determines the cooling duty specification for the larger scale reactor which is a key operational parameter.

Batch times are easily obtained from heat flow data and this also provides valuable information about the expectation after scale-up.


Process Safety Scale Up Brochure 0620.pdf

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