Previous in Forum: Cadworx Plant   Next in Forum: How Do I Measure the Thickness of Acrylic?
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
7 comments
Rate Comments: Nested
paresh_career001
Power-User

Join Date: Oct 2008
Location: Gujarat, India
Posts: 142

LPG and CNG Liquefaction

06/23/2011 1:35 AM

Why slight compression of gaseous LPG will undergo liquefaction but CNG does not why? Is there anything related to compressibility factor in this phenomena?

__________________
 Paresh B. Gujarati
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
Tornado
Guru
Technical Fields - Technical Writing - New Member Engineering Fields - Piping Design Engineering - New Member

Join Date: May 2009
Location: Richland, WA, USA
Posts: 21017
Good Answers: 795
#1

Re: LPG and CNG liquefaction

06/23/2011 1:37 AM

Please see the saturated temperature/pressure curves for each.

__________________
 In vino veritas; in cervisia carmen; in aqua E. coli.
Register to Reply
3
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#2

Re: LPG and CNG liquefaction

06/23/2011 6:19 AM

Because the critical temperature of natural gas (mostly methane) is well below room temperature, but for petroleum gas (mostly propane) it's above.

__________________
 Give masochists a fair crack of the whip
Register to Reply Good Answer (Score 3)
No more Good Answers.
pritam
Guru
Engineering Fields - Mechanical Engineering - New Member India - Member - New Member

Join Date: Aug 2008
Location: City of destiny, INDIA
Posts: 775
Good Answers: 67
#3

Re: LPG and CNG Liquefaction

06/23/2011 7:51 AM

No, compressibility factor has nothing to do to cause this phenomena.
Register to Reply
Joe Sparky
Power-User

Join Date: Jun 2009
Location: New Zealand
Posts: 403
Good Answers: 5
#4

Re: LPG and CNG Liquefaction

06/23/2011 11:59 PM

To transform natural gas in into LNG the gas requires cooling and compression

Joe
Register to Reply
shujaat
Participant

Join Date: Apr 2011
Posts: 2
#5

Re: LPG and CNG Liquefaction

06/25/2011 6:12 AM

Please refer to the critical properties of the components of both LPG & CNG.You have to referigerate below critical temperature and compress above the critical pressure to liquify the gases
Register to Reply
Anonymous Poster #1
#6
In reply to #5

Re: LPG and CNG Liquefaction

06/25/2011 9:51 AM

Please refer to the 1st reply
Register to Reply
Codemaster
Guru

Join Date: Jul 2005
Location: Stoke-on-Trent, UK
Posts: 4496
Good Answers: 137
#7
In reply to #5

Re: LPG and CNG Liquefaction

06/25/2011 10:14 AM

Not quite. If it's at critical temperature you need to compress to critical pressure to cause it to liquefy. If it's below critical temperature it liquifies at a lower pressure, determined from vapour pressure vs temperature data for the gas.

__________________
 Give masochists a fair crack of the whip
Register to Reply
Register to Reply
Have a Different Question?
7 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

Anonymous Poster (1); Codemaster (2); Joe Sparky (1); pritam (1); shujaat (1); Tornado (1)

Previous in Forum: Cadworx Plant   Next in Forum: How Do I Measure the Thickness of Acrylic?

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Mechanical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (91 right now)
Show Members
Advertisement