By M. Douglas LeVan
Now in its 8th version, Perry's Chemical Engineers' instruction manual bargains unequalled, updated insurance of all elements of chemical engineering. For the 1st time, person sections can be found for buy. you can now obtain basically the content material you would like for a fragment of the cost of the whole quantity. Streamline your learn, pinpoint really good info, and economize by means of ordering unmarried sections of this definitive chemical engineering reference today.
First released in 1934, Perry's Chemical Engineers' instruction manual has outfitted generations of engineers and chemists with knowledgeable resource of chemical engineering info and information. Now up-to-date to mirror the newest know-how and methods of the hot millennium, the 8th variation of this vintage consultant presents unsurpassed assurance of each element of chemical engineering-from primary rules to chemical tactics and gear to new laptop applications.
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Additional info for Perry's chemical Engineer's handbook, Section 16
In all cases, isocratic elution results in a dilution of the separated products. In gradient elution, the eluting strength of the mobile phase is gradually increased after supplying the feed to the column. In liquid chromatography, this is accomplished by changing the mobile phase composition. The gradient in eluting strength of the mobile phase that is generated in the column is used to modulate the separation allowing control of the retention time of weakly and strongly retained CHROMATOGRAPHY 16-39 FIG.
16-136) dζ ∆(v*c2) ∆(v*chf) ∆(v*c1) 0 0 Example 12: Adiabatic Adsorption and Thermal Regeneration An initially clean activated carbon bed at 320 K is fed a vapor of benzene in nitrogen at a total pressure of 1 MPa. The concentration of benzene in the feed is 6 mol/m3. After the bed is uniformly saturated with feed, it is regenerated using benzene-free nitrogen at 400 K and 1 MPa. Solve for both steps. For simplicity, neglect fluid-phase accumulation terms and assume constant mean heat capacities for stationary and fluid phases and a constant velocity.
16-96) and (16-99) can be used for this case with Dsi replaced by Dei. , Clarendon Press, 1975): ∞ 6Bi2 exp [−(p2nεp Dpi t/r p2)/(εp + ρp Ki)] F = 1 − Α ᎏᎏᎏᎏ pn2 [p2n + Bi(Bi − 1)] n=1 (16-110) where Bi = kf rp /εp Dpi is the Biot number and the pns are the positive roots of pn cot pn = 1 − Bi (16-111) For a finite fluid volume the solution is: ∞ exp [−(pn2 εp Dpi t/r p2)/(εp + ρp Ki)] F = 1 − 6 Α ᎏᎏᎏᎏᎏᎏ ∞ 9Λ p2 p4n n=1 + (1 − Λ∞)pn2 − (5Λ∞ + 1) ᎏᎏn + (1 − Λ∞) ᎏᎏ ᎏᎏ ∞ 1−Λ Bi Bi2 (16-112) where the pns are the positive roots of 1 − Λ∞ pn2 3 − ᎏᎏ ᎏᎏ tan pn Λ∞ Bi (16-113) ᎏ = ᎏᎏᎏ ∞ pn 1 − Λ (Bi − 1)pn2 3 + ᎏᎏ ᎏᎏ Λ∞ Bi These expressions can also be used for the case of external mass transfer and solid diffusion control by substituting Dsi for εpDpi /(εp + ρpKi) and kf rp /(ρp KiDsi) for the Biot number.
Perry's chemical Engineer's handbook, Section 16 by M. Douglas LeVan