Yes, but isn't jet fuel effectively a particularly pure kerosene?<br><a href="http://en.wikipedia.org/wiki/Avgas">http://en.wikipedia.org/wiki/Avgas</a><br>That said, I think the difficulty in replacing the Libyan crude is the "spare" Saudi capacity is in more sour crude, and the refineries expecting Libyan sweet crude can't process it.<br>
I gather there is some global supply chain re-jigging going on to supply some of the sour crude to Asia in place of their usual light-sweet, as they can refine it, leaving some of their Saudi Light Sweet available for Europe.<br>
Note also that Ireland gets 23% of its oil from Libya (or rather, isn't getting) and Italy sources 10% of its natural gas from a Libyan pipeline.<br>Regards,<br>Michael Skeggs<br><br><div class="gmail_quote">On 1 March 2011 21:06, X <span dir="ltr"><<a href="mailto:X">X</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div>
Dear Tony <br>
<br>
By "energy density" I mean heat of combustion per unit mass of fuel. The following table (from Wiki) illustrates the general trend as you increase the length of a hydrocarbon chain. <br><br><table align="left">
<tbody>
<tr>
<td align="left"> Fuel<br></td><td>Megajoule per kilogram (MJ per kg)<br></td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Methane" target="_blank">Methane</a></td>
<td>55.50</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Ethane" target="_blank">Ethane</a></td>
<td>51.90</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Propane" target="_blank">Propane</a></td>
<td>50.35</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Butane" target="_blank">Butane</a></td>
<td>49.50</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Gasoline" target="_blank">Gasoline</a></td>
<td>47.30</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Kerosene" target="_blank">Kerosene</a></td>
<td>46.20</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Paraffin" target="_blank">Paraffin</a></td>
<td>46.00</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Diesel_fuel" title="Diesel fuel" target="_blank">Diesel</a></td>
<td>44.80</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Coal" target="_blank">Coal</a> (<a href="http://en.wikipedia.org/wiki/Anthracite" target="_blank">Anthracite</a>)</td>
<td>27.00</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Coal" target="_blank">Coal</a> (<a href="http://en.wikipedia.org/wiki/Lignite" target="_blank">Lignite</a>)</td>
<td>15.00</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Wood" target="_blank">Wood</a></td>
<td>15.00</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Peat" target="_blank">Peat</a> (dry)</td>
<td>15.00</td>
<td><br></td>
<td><br></td>
<td><br></td>
</tr><tr>
<td align="left"><a href="http://en.wikipedia.org/wiki/Peat" target="_blank">Peat</a> (damp)</td>
<td>6.00</td>
<td><br></td></tr></tbody></table><br><br><br><br><br><br><br><br> <br><br><br><br><br><br><br><br><br><br>Combustion of the short chain alkanes liberates relatively more energy per unit mass - which is critical when you are trying to get an aircraft off the ground. <br>
<br>Cheers<br><br>X<br><br><br><br><hr>From: <a href="mailto:tony@tony-barry.emu.id.au" target="_blank">tony@tony-barry.emu.id.au</a><div class="im"><br>Subject: Re: [Peakoil] Saudi crude can't replace Libyan<br></div>
Date: Tue, 1 Mar 2011 19:52:17 +1100<br>To: <a href="mailto:X" target="_blank">X</a>; <a href="mailto:peakoil@act-peakoil.org" target="_blank">peakoil@act-peakoil.org</a><div><div></div><div class="h5">
<br><br>
<br><div><div>On 01/03/2011, at 7:47 AM, X wrote:</div><br><blockquote><span style="border-collapse: separate; font-family: Monaco; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; font-size: medium;"><span style="font-family: Tahoma; font-size: 13px;">Avgas, I believe. Aviation fuel must be as energy dense and as light as possible. I suspect the specifications for aviation fuel would be much stricter than for terrestrial transport - where you can get away with heavier substitutes and additives.<span> </span></span></span></blockquote>
<br></div> The energy density would be much the same and the density. While it might be a fraction lighter in deensity it is more a matter of the higher temperature it burns at and the lower temperature of the fuel tanks although I am guessing a bit.<div>
<br><div>Tony</div><div><br><div>
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