simular reaction calorimetry ...an essential tool for process r&d a reaction calorimeter is a tool that allows for the precise simulationthermal study of a chemistryassociated plant, typically at the one litre scale. subsequently, important safety, viabilityoptimisation data can be obtained prior to scale up. safe process scale-up the most common application of a reaction calorimeter is the determination of heat released during a process. from this the subsequent cooling duty required for scale up can be calculated. in addition the potential adiabatic temperature rise can be calculated. combined with other techniques, a basis for safety can therefore be determined. further information available includes the determination of reagent accumulationthe impact of variables such as agitationcatalyst upon the reaction rate. by changing feed ratesbatch temperature, the optimum operating conditions for both efficiencyproduct quality, can be determined. flexibility without compromise simular is built around our unique modular electronicsthe latest in-house developed windows software, to provide you with a tool that meets your requirements, both now,into the future. se-lect the components that most closely match your plant conditions, then combine them to have a dedicated, simple-to operate tool that simulates your plantprocess.this includes temperature range, agitation, speed, reagent feed rateeven reactor geometry - find out why we offer the best, most flexible, reaction calorimeter for your application. multiple calorimetric methods unlike most leading reaction calorimeters, simular is designed to be used by research chemistssafety specialists alike.this is made possible by power compensation calorimetry, unique to the simular.this allows accurate determination of heat release without the need for time-consuming calibration or complex calculation procedures. for more conservative users, the classical heat flow calorimetry method is also supported as standard. why simular flexible: whether it is the wide temperature options,multiple reagent feeds or reactor specifications, no other system covers such a wide range of chemical conditionsvariables. powerful: simular is the only reaction calorimeter to offer heat flow, power compensationreflux calorimetric techniques. each of which offers specific advantages depending on your chemistry,all are available regardless of reactor specification. expandable: the modularity of simular systems allows you to add on to your system - feeds, sensors etc - in the future simplywithout major cost implications. ease of ownership: the system will fit into existing fume hoodsusually needs only existing power supplies.we also have the most innovativeuser friendly software,use the standard laboratory components that you are already familiar with. don’t configure your chemistry to suit your equipment - se-lect the simular to suit your chemistry.specification turnkey systems: for safeefficient scale up, it is essential that your tools simulate your plant as closely as possible. in addition it is important that as much informationinsight as possible about the process be obtained. as such the options, upgradesflexibility offered by the simular are almost limitless,we put them all together in a turnkeydedicated solution. reactors: the standard reactor is a 1 litre glass, 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 geometriescustom designed vessels are available to simulate real plant conditions. feeds: reagent feeds - gas, liquidsolids feeds are all available using a variety of application dependent techniques. standard liquid feeds are pumpbalance combinations, but options include syringe pumps for low flow rate feedspressurised 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. operating range: pressure - hel offer a range of options for the study of reactions under pressure including 612 bar glass reactors, 60 bar stainless steel with a number of other alloysspecialist 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 -80over 350°c, with precision of better than +/-0.1°c. these systems also offer a small foot printemergency cooling is available when required. controls & sensors: softwareelectronics allow a variety of inputs to be loggedif necessary, used for feedback control. this includes ph, turbidity, conductivity, ftir, particle size etc. sampling: hel have developed tools for automatic samplingdilution during chemical reactions. a portable sampler, software driven, is available as an option. calorimetric methods: only simular offers you three different methods of reaction calorimetry. heat flow is the most widely used method,is standard on all simular systems. heat generated by the reaction is removed by the oil jacket,by using precise calibration heaters, prepost reaction, the energy evolved can be determined. reflux calorimetry allows for the determination of heat flow even during large changes in reflux temperaturereactant volume. power compensation is a method that bypasses the need for the lengthy calibration steps involved in heat flow. advantages: reduced experiment time • intuitive ""live"" results • improved temperature control. running experiments: winiso has been developed in-house to provide a logicalsimple interface for describing multiple step processes. using input screens, arranged in a series of “recipe cards”, the operator simply indicates the required set point for each peripheral. each step is then terminated on any se-lected conditions, (e.g. temperature, time, feeds completed), or by a series of logic statements. during operation, all conditions are displayed on a mimic, numericallyon a trend graph. all steps can also be modified during operation. changes are fully documented in the output file. information obtained: all process variables such as pressure, temperature, ph, feed rate etc, can be stored on disc for off-line analysis as well as being displayed in real-time. formal calorimetric data is obtained by off-line calculation using our proprietary iq software package. this includes reaction enthalpy, heat release rate, heat transfer rate etc.
