Coal to oil question

From: brianb (bri1600bv_at_hotmail.com)
Date: 07/09/04 

Date: 9 Jul 2004 16:33:24 -0700

What percentage of coal is carbon and hydrogen?

What % of gasoline is carbon and hydrogen?

In other words, how much of the coal (by weight) will be wasted if you
do not add a hydrogen source? And how much hydrogen would you have to
add to couple all the carbon in coal with hydrogen to make an oil like
hydrocarbon?

I think coal is 6% hydrogen by weight. Natural gas is CH4 so I guess
that's 25% hydrogen by weight (carbon is 12, hydrogen 1, right?). So
oil is probably 10-15% hydrogen by weight. Does this mean if you
added say 100kg to a 1000kg piece of coal that you could end up with
1100 kg of oil? ARe the percentages right?

Does this also imply that without added hyrogen that you are limited
to getting 1/2 the weight of coal (approx) in oil?

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