Feed lines plotting

Plots of the limiting flux. /mux as a function of solution concentration for latex solution data are shown in Figure 6.9 for a series of latex solutions at various feed solution flow rates. A series of straight line plots is obtained, and these extrapolate to the gel concentration cgel at zero flux. The slopes of the plots in Figure 6.9 are proportional to the term D/S in Equation (6.3). The increase in flux resulting from an increase in the fluid recirculation rate is caused by the decrease in the boundary layer thickness S. 

When ri = l,r2 = 1, and r r2 = 1, the copolymerization is said to be ideal each radical shows the same preference for one of the monomers. The sequence of monomers in the copolymer is completely random, and the polymer composition is the same as the comonomer feed. A plot of mole percent of Mi in the copolymer against mole percent of Mi in the corresponding feed will give a straight line with zero intercept. 

To plot the feed line, you will need a point in addition to the slope. The y-intercept could be this point, but an easier one to find is where the feed line intersects the diagonal ty = x = Xf. 

In Fig, 18.14 are plotted operating lines for various types of feed, on the assumption that Xg, x, L, and D are all constant. The corresponding feed lines are shown. If the feed is a cold liquid, the feed line slopes upward and to the right if the feed is a saturated liquid, the line is vertical if the feed is a mixture of liquid and vapor, the line slopes upward and to the left and the slope is the negative of the ratio of the liquid to the vapor if the feed is a saturated vapor, the line is horizontal and finally, if the feed is superheated vapor, the line slopes downward and to the left. 

The third step is to plot the operating lines. The intercept of the rcctif3ring line on the y axis is, from Eq. (18.19), 0.974/(3.5 + 1) = 0.216. From the intersection of this operating line and the feed line the stripping line is drawn. 

C. Plan. Determine q from Eq. t4-17) and the enthalpy-conposition diagram at 1 atoL Plot the feed line. Calculate L/V. Plot the top operating line then plot the bottom operating line and step off... 

Feed line intersects y=x line at feed concentration z=0.2. Feed line is plotted in Figure 4-13. 

Enough information is available to plot the top operating line. Feed Line ... 

Once we substitute in values, we can plot the feed line. 

Bottom Operating Line We can plot this line between two points, the intercept of top operating line and feed line, and... 

D. Do It. The two feed lines and the top operating line can immediately be plotted on a y-x diagram This is shown in Figure 4-19. Before plotting the middle operating line we must find D from Eq. (4z48). 

Now the middle operating line is plotted in Figure 4-19 from the intersection of feed line 2 and the top operating line, with a slope of 1.10. The bottom operating line then goes from y = x = Xg to the intersection of the middle operating line and feed line 1 (see Figure 4-19T... 

Calculate the feed quality and determine its effect on flow rates. Plot the feed line on a y-x diagram... 

D2. We are separating ethanol and water. All percentages are mol%. Find the q values and plot the feed lines. 

Once we have plotted the operating lines, we step off stages until a stage crosses the feed line. At that point we switch operating lines. 

Next calculate the feed-line slope — (1 — ///) and plot the straight line through (Xf, Yp). 

Similaily, the entice equilibiium curve is calculated and is plotted in Figure 10. The feed is at the boiFng point so the q line is drawn vertically with an infinite slope. 

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