Authors: S.V. Puchkov, Yu.V. Nepomnyashchikh, N.S. Manin

Title of the article: Installation for measurement rates of reactions proceeding with gas absorption, gas emission

Year: 2019, Issue: 2, Pages: 58-65

Branch of knowledge: 05.17.04 Technology of organic substances

Index UDK: 54.07

DOI: 10.26730/1999-4125-2019-2-58-65

Abstract: The existing laboratory installations designed to measure the reaction rates accompanied by gas absorption or emission have been reviewed and analysed. The main advantages and disadvantages of the existing installations are shown. The prototype for carrying out improvements of the studied processes concerning the system of rate measurement is chosen. The system of automation of gas-metric installation is designed. The system of automation has a set of differential pressure sensors with different ranges of pressure measurement: MPX5010DP the pressure measured at full scale of 10 kPa, sensitivity of 450 mV/kPa; MPXV4006DP the pressure measured at full scale of 6 kPa, sensitivity of 766 mV/kPa; MPXV5004DP the pressure measured at full scale of 4 kPa, sensitivity 1000mv/kPa; WTR05-1KPA-E1-S2 the pressure measured at full scale of 1 kPa, sensitivity of 4000 mV/kPa. The described above differential pressure sensors have high sensitivity, high precision, the built-in circuit of the signal normalization (signal amplification) allowing to connect the sensor directly to an analog input of the microcontroller, the built-in calibration and thermal compensation, the supply voltage of 5 V. The installation is equipped with the system of electromechanical valves operated by electromagnetic relays, the system of thermal regulation on the basis of a thermistor. The general control of installation is carried out by the microcontroller in the structure of the Arduino model card. It is shown that the designed installation makes it possible to measure reaction rates up to 10^-9 mol ·л^-1 ·с^-1.

Key words: reaction rate gas-metric installation differential pressure sensors microcontroller automation

CITE DOWNLOAD