refrigerant for LNG liquefaction..

[olivertwist]

hai all...
i would like to ask about what type of refrigerant to be used for cooling natural gas. since there are a lot of coding for refrigerant, it makes me confius which one should be use.

i would like to know what typ of refrigerant to be used, it might consist methane,prpane,ethane, butane, ethyene..
the technology we used is double mixed refrigerant.

ps: now im doin a design task which is compulsary for every chemical engineering student..sorry if my knwladge about refrigerant is low..i need ur help..:confused:

[olivertwist]

oh ya..can you provide me a useful link about this..haha

[Brian_UK]

Do you know Oliver that with the power of an Internet search engine such as Google you will get almost 7000 replies to the title of your thread here.

A simple start from this site may get you started....

http://www.imionline.no/imidocs/0026P002%20LNG%20Liquefaction%20system.pdf

As for the refrigerant used, they use nitrogen.

[olivertwist]

thanx man... im also try to find using google.. but a bit confius on choosing refrigerant..

[zosoguy]

hi Oliver...
u just want to cool the natural gas or want to liquefy it ?

for liquefy natural gas u must reach less than -150 C and use ARC (Auto cascade refrigeration ) or multistage cascade refrigeration technology.
in both of these u must have to use methane and other are as u wrote ethane, ethylene and propane.