L20 - Lecture 20 Gas Film Coefficient Ky kg Hy...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 20
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Gas Film Coefficient • Ky, kg, Hy. • Experimentally, NH 3 absorption in water; NH 3 is highly soluble in water; liquid phase mass resistance is small. • Hoy, Hy (Hy is 10% less than Hoy) •Hoy α Gy 0.3 to 0.4 »Ky α Gy 0.6 to 0.7 . • As Gx increases, Hoy decreases (liquid hold up ,Interfacial area , Hy )
Background image of page 2
•Hoy α Gx -0.7 to -0.4 • Fig 18.22 (Raschig-Ring Packing) Gx = 500 Lb/ft 2 h Gx = 1500 Lb/ft2 h Log Hoy (ft) Log Hy Log Gy (Lb/ft 2 h)
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
• For gases other than NH 3 , use Hy = Hy, NH3 (N sc /0.66) 0.5 ¾ OTHER PACKING. fp = (Kya) any Packing = (Kya) 1-5” Raschig ring Packing = Hy, 1-5” Raschig R. Hy, any packing at Gx = 1000 Lb/ft2 h and Gy = 500 Lb/ft2 h (Listed in Table 18-1)
Background image of page 4
• Ceramic Intalox saddle packing fp ~ 2.27 for ½” ~ 0.64 for 3” As size of packing ,fp
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Log P Log Gy Gx Flooding Loading -Dry packing: p α Gy 1.8 (Argun Eq. Gy
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 20

L20 - Lecture 20 Gas Film Coefficient Ky kg Hy...

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online