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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>G’day Krishna,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>I think the different figures are for different pressures and/or
temperatures, as conventions vary. I have a value of 0.628 kg/m3 at 1.103 kPa
and 20C, so 1000 m3 of biogas will become 737 cubic metres of 95% methane.
Ignoring the CO2 will give 700 m3 of methane, weighing about 440 kg. This will
be the mass whatever the pressure (unless you have a leak!). At 180 bar the
volume will be approximately 4 cubic metres (at 20C).<o:p></o:p></span></p>
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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Hope this helps,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>HOOROO<o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>Mr. Paul Harris, Room 202 Charles Hawker Building, Faculty of
Sciences, The University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA
5064 Ph : +61 8 8303 7880
Fax : +61 8 8303 4386 <a
href="mailto:paul.harris@adelaide.edu.au">mailto:paul.harris@adelaide.edu.au</a>
<a href="http://www.adelaide.edu.au/directory/paul.harris">http://www.adelaide.edu.au/directory/paul.harris</a><o:p></o:p></span></p>
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color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>CRICOS Provider Number 00123M<o:p></o:p></span></p>
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<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> digestion-bounces@lists.bioenergylists.org
[mailto:digestion-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Murali
Krishna<br>
<b>Sent:</b> Thursday, 31 March 2011 4:47 PM<br>
<b>To:</b> Digestion@bioenergylists.org<br>
<b>Subject:</b> [Digestion] density of methane and bottling<o:p></o:p></span></p>
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<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Hi,<br>
<br>
I shall thank you to clarify the follwoing:<br>
<br>
The density of methane is shown as 0.67, 0.72 and 1.2 on the web.
Presuming that 1000 cubic meter of methane at 70% in biogas, purified
upto 95% and then compressed what will be the output of gas in kgs. It is
likely to be compressed at three stages upto 180 bar pressure.<br>
<br>
Krishna<o:p></o:p></p>
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