DEVELOPMENT AND CHARACTERIZATION OF 5-LITRE CONTINUOUS STIRRED TANK REACTOR

AUTHOR: SAMUEL WADZANI GADZAMA

DEPARTMENT: CHEMICAL ENGINEERING

AFFILIATION: NNAMDI AZIKIWE UNIVERSITY, AWKA

Continuous Stirred Tank Reactors (CSTR) are used ubiquitously in chemical process industry for mixing, reactions and crystallizations.The purpose of this research work is to developandcharacterize a Continuous Stirred Tank Reactor. The CSTR fabricated has a transparent borosilicate glass bell-jar, which was used as the reactor vesselthat has a capacity of 5000mL, vessel height of 230mm, and vessel diameter of 155mm.It has four baffles positioned at right angle to each other. The stirrer is controlled by a geared motor; its speed is controlled by a speed selector. The speed selected is detected by a proximity switch and transmitted to the digital meter all of which are on the system control panel.The tracer experiments were carried out, the effect of different parameters such as stirring speed, concentration and time were studied. In performing the tracer test experiments, standard solutions of NaCl were prepared in 0.2M, 0.4M, 0.6M, 0.8M and 1.0M with methyl blue as the tracer. However, on the course of the experimentation, it was discovered that the 0.8M and 1.0M solution conductivity values were beyond the range of the conductivity meter used, as such they were discarded.This necessitated that the series of experiments be conducted with the 0.2M, 0.4M, and 0.6M solutions at 80rpm, 100rpm, 120rpm, 140rpm and 160rpm, at 20 seconds intervals.Twenty eight number of value were taken for each rpm and each concentration, thus, generating a total number of twenty five curve plots for each 20 seconds interval at a particular rpm( 600 second in total for each rpm). Experimental data obtained at 0.6M and 160rpm gave a curve that is in close agreement to that of the model. In other words, the results obtained at a concentration of 0.6M and 160rpm are in close agreement with those of early researchers

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