RC-1 calorimeter

A typical reaction calorimeter consists of a jacketed reactor, addition device, temperature transducer(s) and calibration heaters. There are a number of devices within Dow ranging from the commercially available Mettler RC-1 (1-2 L volume) to smaller, in-house reactors (10-50 ml). While each of these devices has their unique attributes (e.g., in-situ spectrometry, quick turn-around, ability to reflux, etc.), all of the calorimeters will produce a signal of heat flow vs. time. The heat flow is usually produced in response to the addition of a reagent or an increase in temperature. Volume of gas or pressure generated may also be measured. 

RC reaction calorimeter Ideal flux Main reactions 300-2000g -40 a 250 °C 1.0... 

In order to understand, and avoid, the exotherm observed in the reduction reaction, the following process steps were examined using the Mettler RC-1 reaction calorimeter ... 

In conclusion, the heat compensation calorimeter RC-1 run in TR-mode provides an excellent on-line signal to monitor rapid changes in the metabolic activity. Especially, it is faster than the gas analyses. 

When appropriate conditions cannot be reached in the calorimetric measuring unit because of limiting substrate(s) and/or high cell densities, a bench-scale calorimeter in which the fermenter and the calorimeter is one unit may be preferable. For example, in the chemostat study by Larsson et al. [22] a 2-liter bench-scale calorimeter (model RC-1 Mettler-Toledo AG, Greifensee,... 

Hydrogenation was carried out in a mixed solvent of tetrahydrofuran and rc-hexane using cyclohexene or 1-hexene (Ahyd// = -118.8 or -126.6 kJ mol 1) as a thermochemical standard. The results were corrected for solvent effects in the mixed solvent used as a calorimeter fluid. The tabulated value is the arithmetic mean of two separate experiments, each consisting of 9 runs of sample vs. standard. The uncertainty is estimated to express 95% confidence limits. 

Differential Scanning Calorimeter, operating in either power compensation or heat flux mode, capable of heating at 10 rc/min from 15°C to 150°C. Controlled cooling capability is preferred but not essential. The calorimeter must be able to record automatically the differential signal (WE or WT) versus temperature with a temperature repeatability of 0.5°C. If the differential record is versus time, the calorimeter must have the capability to make a simultaneous record of temperature versus time. 

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