Answer to Question #235118 in Chemical Engineering for Loki

Question #235118

3) A solution of washed raw cane sugar is coloured by the presence of impurities. It is to be decolourised by the treatment with an adsorptive carbon in a contact filtration plant. The data for an equilibrium isotherm is given below. The original solution has a colour concentration of 9.6 measured on an arbitrary scale and it is desired to reduce colour to 10% of its original value

Kg carbon/kg solution:

0

0.001

0.004

0.008

0.02

0.04

Colour units /kg solution

9.6

8.6

6.3

4.3

1.7

0.7


Convert the data to a suitable form for plotting the equilibrium isotherm and determine the quantity of fresh carbon required per 1000 kg of solution for a two stage counter-current operation?

Explain briefly with step by step process?


1
Expert's answer
2021-09-12T07:25:02-0400

From this we get:

Ls=Gx0.0195= 19.5kgs

It implies that 19.5Kgs of fresh carbon fis needed for the 1000Kgs solution per to allow this two stage counter-current operation.

We can plot the equilibrium isotherm as shown below:

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