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member 2009 Sponsor arborbiofuelscompany.com |
NS,
As to your question about adding (hot) water before or after the removal of methanol: Although water added when hot will settle much better (in the rendering industry a min. temp. of 140 deg. and usually a top temp. of 180 deg. F is used) than if added the next day after the demethed batch has cooled - you still run the risk of some water in the biodiesel so it is a timing a process thing. We don't do this because water really impacts the frequency of flushes on the ion exchange resin columns. However if I did do this and I might try this since we're talking about it - I would wait until the batch was completely demethed - we usually can get to about .20% (2000 ppm) with out excessively heating the batch. Then I'd do my first trial add about 3.0% water by the biodiesel batches volume thru a misting ring or misting nozzle. Let it settle overnight - drain the bottom off and spray the biodiesel into our large cone bottom settling tank (hopefully the spraying would drive off some of the water remaining in the biodiesel). Then Perform a water test using the calcium hydride Sandy Brae kit (want to see <0.05% or <500 ppm) This keeps the water content to <25% that of the methanol content. We then pump directly to an Eco2Pure Column (wood fiber, sawdust, molecular seive mixture) and then through the ion exchange resins... If you do this anytime soon let us know what you find out. GCG PS what's good about adding the water before the glycerin drop is you know the glycerin is going to take all the water with it... just makes the methanol recovery from glyecerin later a little more challenging... Causing a Regenerative Economy http://arborbiofuelscompany.com/ http://biodieselpictures.com/v...opic.php?p=1066#1066 |
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I think we've all got our lines crossed here. The thread is about resins, but things then seemed to shift to sawdust. Doing a 5% wash doesnt prolongue resin life, as GCG says - I've tried it and the resin didnt last any longer, but I wasnt talking about doing a 5% wash, but merely pouring hot water into the oil at the end of the processing, so that the oil doesnt become damp. However I would recommend the 5% wash with sawdust and shavings with higher titrating oil, ie above 2.5.
Using sawdust/shavings isnt the same as using resin, although they can be used in the same set up. However, removing the wood from a resin tower at renewal time is troublesome. Much more wood is needed than resin, at least if its to be effective for any length of time before changing. Wood tolerates water and methanol much longer than resin but needs a slower flow rate, especially shavings. |
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Hey pard, long time no see  how are you measuring the methanol level? |
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member 2009 Sponsor arborbiofuelscompany.com |
Hey Fab,
I usually use a flash point tester and a chart. Basically the flash point corresponds to a particular level of methanol. However realizing that everyone doesn't have access to this kind of equipment I have found a way to test methanol concentrations fairly accurately down between the 0.5-1% range and am working to get it down to ASTM levels. This way all homebrewers can start checking for this data and it will provide us a huge pool of new analysis... Speaking of not seeing you - I hope to be over your way in the next week, are you going to be around? GCG Causing a Regenerative Economy http://arborbiofuelscompany.com/ http://biodieselpictures.com/v...opic.php?p=1066#1066 |
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Yeah, I'll be here off and on just give me a call or an email and I'll make sure I'm here, you wouldn't recognize my refinery any more.
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GCG can you please post your chart? I have access to a closed cup flash tester. Would be interested to know what % methanol that corresponds to. Also what is your homebrewer flash point method?? I know an open cup one where u simply heat it with a thermometer only touching the fluid, and wave a bbq lighter over the top. When it ignites record your flash temp..is this like urs? |
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Personally and IMHO...
IF you get the whole process Right and using a suitable system such as the GL 'Eco-System' Then Resins and Eco-Craps(tm) are not needed. I made a 100 litre batch yesterday, settled overnight, filtered an hour or so ago, and its in the car now... After settling (the effectiveness of which depends on both the quality of Conversion as well as the De-Meth phase) the fuel is clear enough to read through. This after filtering down to 1 mic, and there is no quantities of soap left to speak of... -------------------------- www.doctordiesel.co.uk "As for testing, know now that---- only mechanisms built by bunglers require testing.--- Properly-built machines work properly." 'Doc' Smith.  |
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member 2009 Sponsor arborbiofuelscompany.com |
Sorry this took so long - been busy... Here you go (this is right off the Purolite Webpage material:  GCG Causing a Regenerative Economy http://arborbiofuelscompany.com/ http://biodieselpictures.com/v...opic.php?p=1066#1066 |
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