Lecture10 - ChE 210 Meeting 10 February 2 2011 Example Problem a(10 points Gasohol is 10 volume ethanol and 90 volume gasoline What is the mass

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
Background image of page 3

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

View Full DocumentRight Arrow Icon
Background image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ChE 210: Meeting 10 February 2, 2011 Example Problem a. (10 points) Gasohol is 10. volume % ethanol and 90. volume % gasoline. What is the mass fraction of ethanol in gasohol? (S.G ethanol = 0.789 and S.G. gasoline = 0.710) 3/6 ChE 210: Meeting 10 February 2, 2011 b. (14 points) Pure gasoline and pure ethanol are fed continuously to a mixer to produce gasohol. Draw the process flow diagram and label the streams with appropriate variables for the flow rates and compositions. Include known values from part (a) on the process flow diagram. 1 v N . c. (8 points) Based on the process flow diagram in part (b), how many degrees of freedom are there in this process? .l ' \ v,: H» '1 “ w“ J \mlyr‘ «‘5 l '1 t 4/6 ChE 210: Meeting 10 February 2, 2011 d. (12 points) Write the total mass balance equation and the species mass balance equations for gasoline and ethanol using the variables on the process flow diagram in part (b). Assume that the process is operating at steady state. Provide a reason for eliminating any terms from the general balance equation. l.‘ Total Massfi‘ H l Gasoline: Ethanol: e. (10 points) Calculate the mass flow rates of gasoline and ethanol (kg/h) needed to produce 200. kg/h of gasohol. 5/6 ChE 210: Meeting 10 February 2, 2011 f. (8 points) Use a scale factor to calculate the mass flow rates of gasoline and ethanol (kg/h) needed to produce 1000. kg/h of gasohol \ ; ~/ l ti \ ‘ .Jl" ‘ l \ Li H) 1 l (gt 1‘ /) fi'l - I.“ ll» 1 “\y d ‘l ‘ l \\ » "\«V'Jx Yl’lel llk x ‘ ‘1 /‘1k '- ‘LL: 9 if ; V [K ll \ , \ 6/6 ...
View Full Document

This note was uploaded on 07/31/2011 for the course CHEM E 210 taught by Professor Shanks during the Spring '02 term at Iowa State.

Page1 / 4

Lecture10 - ChE 210 Meeting 10 February 2 2011 Example Problem a(10 points Gasohol is 10 volume ethanol and 90 volume gasoline What is the mass

This preview shows document pages 1 - 4. Sign up to view the full document.

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