Reaction Calorimetry

A reaction calorimeter is a tool that allows for the precise simulation and thermal study of chemistry, typically at the one litre scale.
Subsequently, important safety, viability and optimisation data can be obtained pior to scale-up.

Turn-key systems
For sale and efficient scale-up, it is essential that your tools stimulate your plant as closely as possible. In addition, it is important that as much information and insight about the process is obtained. As such the options, upgrades and flexibility offered by the SIMULAR are almost limitless, and are put together in a dedicated turn-key solution.

Reactors
The standard reactor is a 1 litre atmospheric pressure system. Optional volumes range from 0.2 to 20 litres in glass, stainless steel or resistant alloy, with pressure ratings up to 200 bar. Specialist geometries and customs designed vessels are available to stimulate real plant conditions.

Operating Range
Pressure - HEL offer a range of options for the study of reactions under pressure including 6 and 12 bar glass and 60 bar stainless steel reactors. There are other alloys and specialist material options. We even produce systems that operate at up to 200 bar reactor pressure.
Temperature - By using commercially available heater/chiller systems, we can offer you the temperature range you need, between -80 and over 350°C, with precision of better than +/-0.1°C. These systems also offer a small foot print and emergency cooling is available when required.

Feeds
Reagent feeds - gas, liquid and solid feeds are all available using a variety of application dependent techniques. Standard liquid feeds are pump and balance combinations, but options include syringe pumps for low flow rate feeds and pressurised vessels for faster rates and/or highly volatile reagents.
Gas feeds can be controlled via constant reactor pressure, bottle/balance combinations or even mass flow control. Finally automated solids addition is also made possible using a screw feed system developed exclusively by HEL.

Controls & Sensors
Software and electronics allow a variety of inputs to be logged and if necessary, used for feedback control. These include pH, turbidity, conductividy, FTIR, particle size etc.

Sampling
HEL have developed tools for automatic sampling and dilution during chemical reactions. A portable sampler, software driven, is available as an option.

Multiple Calorimetric Methods
Unlike most leading reaction calorimeters, SIMULAR is designed to be used by research chemists and safety specialists alike. Only SILUMAR offers you three different methods of reaction calorimetry:

HEAT FLOW is the most widely used method, and is standard on all SIMULAR systems. Heat generated by the reaction is removed by oil jacket, and by using precise calibration heaters, pre and post reaction, the energy evolved can be determined.

REFLUX CALORIMETRY allows for the determination of heat flow even during large changes in reflux temperature and reactant volume.

POWER COMPENSATION is a method that allows accurate determination of heat realease without the need for the time-consuming calibrations or complex calculation procedures involved in heat flow.

BENEFITS OF POWER COMPENSATION
- Reduced experiment time
- Intuive 'live' results
- Improved temperature control