Petroleum Composition

[ramususi]

please tell me about the composition of petrolem in percentage?.

 

[zdas04]

It is 30% sticky and smells 80% bad.

If you want free information you have to provide enough so that the purveyors of that free information at least have the data required to address your question. Otherwise we're guessing about the question.

You might want to try again, this time use puncuation, explain which characteristics of which petroleum products you are concerned about, and give us an idea why you are asking (the answer to your question will often depend on what you are going to do with the information).

David

 

[waross]

LMGTFY

The hydrocarbons in crude oil are mostly alkanes, cycloalkanes and various aromatic hydrocarbons while the other organic compounds contain nitrogen, oxygen and sulfur, and trace amounts of metals such as iron, nickel, copper and vanadium. The exact molecular composition varies widely from formation to formation but the proportion of chemical elements vary over fairly narrow limits as follows:[8]

Composition by weight Element Percent range
Carbon 83 to 87%
Hydrogen 10 to 14%
Nitrogen 0.1 to 2%
Oxygen 0.1 to 1.5%
Sulfur 0.5 to .6%
Metals < 0.1%

Four different types of hydrocarbon molecules appear in crude oil. The relative percentage of each varies from oil to oil, determining the properties of each oil.[7]

Composition by weight Hydrocarbon Average Range
Paraffins 30% 15 to 60%
Naphthenes 49% 30 to 60%
Aromatics 15% 3 to 30%
Asphaltics 6% remainder

http://en.wikipedia.org/wiki/Petroleum

Bill
--------------------
"Why not the best?"
Jimmy Carter

 

[blacksmith37]

It is foolish for Wiki to give a "typical" produced petroleum composition without more specifics (And I do like Wiki.)
eg. onshore ,average, USA production is 90% water/brine (offshore has lower water %). Not to mention gas /lpg %, which varies with temp ,press, time (a tankers oil volume can change dramatically during transit). I think Shells' Woodbine (?)production in MS was about 50% S. I think zdsa is more correct except 98% is stinky.

 

[zdas04]

I agreee Blacksmith. I can't tell you how many times I've seen a "typical" natural gas described--and I've never yet found a single gas analysis that matched the "typical" values. Heating value, friction factors, and compressibility factors are so different in a mix that is 50% methane and 50% heavier hydrocarbons than a mixture that is 50% methane, 30% CO2, and 20% H2S that it is difficult to tell that they have the same base material.

I've fought publishing "typical" values my whole career, and I regularly lose that fight in a dramatic fashion.

I like Wiki too, but not for this.

David

 

[rmw]

I am not sure you can list all the variables in petroleum with all the letters that Wiki contains.

rmw

 

[dcasto]

well, even Prosim and Winsim can whip up a crude analysis based on just a couple of inputs values.