Cstr Process

The continuous stirred tank reactor (CSTR) is one of the common ideal reactor types in chemical engineering field. CSTR often refers to a model which used to estimate the key unit operation variables by using a continuous agitated-tank reactor to reach aimed output. One of the example of CSTR is the cooling tank which undergoes exothermic reaction which will be further discussed in this project. The mathematical model applied for all fluids such as liquids, slurries or even gases. Chemical kinetics and reactor design are vitally important in producing almost all industrial chemicals. In order to choose a reaction system that suit the chemical plant to operate in highest efficiency and safest manner are the main factors contribute to the success of a chemical plant. In another word, a CSTR is run at steady state with continuous flow of reactants and products. The feed of CSTR is assumed as a homogeneous composition throughout the reactor that indicates the exit stream and inside the tank have the same composition. The reactants and products will be constantly added and withdrawn. In order to achieve homogeneous composition and specified temperature that will be influenced by the process, usually agitation either mechanical or hydraulic agitation will be used.

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Different values of Kc (0, 10, 100, 1000, 5000 and 6000) were inserted to obtain the roots from Routh Array. From Table 4.1, all roots are negative value except when Kc is 6000. Negative roots indicate the process is stable. Besides that, the simulation graphs also indicate the stability of the process. For Kc=0 to Kc=1000, the graph become stable or constant at last. The graph of Kc=5000 assumed to be stable since the trend is gradually increase. For Kc=6000, the graph trend is unstable since it show unbounded exponential growth. Therefore, Kc more than 5134.5 will cause the system become