Register to reply 
Specific Gravity of LNG 
Share this thread: 
#1
Dec1409, 08:12 PM

P: 2

Hi Everyone...
I'm trying to calculate the specific gravity of a sample of LNG using a compostion certificate and temperature and pressure variables of 5 bar at 134 deg C saturated. Its do perform a check for the value used to calculate how much is charged per litre by converting density to litres. The density should be around 0.4 kg/m^3 but i cant seem to get a close answer to that using the ideal gas equation, pv = nrt. Infor on composition certificate; Gas composition; Nitrogen ; 1.18% Methane; 96.66% Gas density at 15 deg C = 0.699 k/m^3 Ave MW = 16.487 g/mol Can someone please help? thanks. 


#2
Dec1509, 02:38 AM

Admin
P: 23,373

pV=nRT is and ideal GAS equation, LNG is a LIQUEFIED natural gas. You can't use theory that describes gaseous state to liquid state.
 


#3
Dec1509, 04:58 AM

P: 2

Any suggestions to which way i should approach it then? cheers.



#4
Dec1509, 05:03 AM

Admin
P: 23,373

Specific Gravity of LNG
Only approach I can think of is to find density tables for LNG, engineering handbooks should have these. There are no theoretical equations that would allow calculation of density of a liquid (and even when such equations exist, they make heavy use of experimentally determined coefficients  so we are back to the handbook and tables).
 


Register to reply 
Related Discussions  
Specific Gravity  Introductory Physics Homework  8  
Specific gravity  General Physics  0  
Specific Gravity  Introductory Physics Homework  1  
Specific gravity  Introductory Physics Homework  2  
Specific gravity  Introductory Physics Homework  1 