|
Go
|
New
|
Find
|
Notify
|
Tools
|
Reply
|
|
|
Member |
Hi all.
At the NBB convention Rohm & Haas had a booth and was promoting Amberlyst 36Wet as an alternative acid catalyst. Unfortunately their sales people had no idea how to use it. http://www.rohmhaas.com/ionexchange/IP/36wet_typical.htm Could one (or more) of the chemist types here explain what all parameters of the catalyst are and how they would compare to sulfuric acid? I seem to recall they the above listed catalyst will absorb some moisture and so might make things much easier for high FFA feedstock. Dropout |
||
|
|
Member |
comment Physical form Opaque beads --- Ionic form as shipped Hydrogen acid form Concentration of acid sites > 5.4 eq/kg eq = mole of H+ Moisture holding capacity 53 to 59 % (H+ form) --- Shipping weight 800 g/L (50 lbs/ft3) --- Fines content < 0.425 mm : 1.0 % max a screen with holes smaller than 0.4mm will hold back >99% Coarse beads > 1.180 mm : 4.0 % max --- Surface area 33 m2/g --- Average pore diameter 240 Å ~10 FFA's long Maximum operating temperature 150°C (300 °F) at 150C the vapor pressure of pure CH3OH is 200psi(a) An additional comment in the .pdf says it's an ideal catalyst for "Olefin Hydration". Now, there could be different uses for the word but it did claim to be the "US" version. Hydration of olefins might mean turning a double bonded pair of carbons into an -CHOH-CH2-... Not exactly esterification and not necessarily good. |
|||
|
|
Member |
Thanks Dover.
Does this particular resin need to have water in order to work? How can the eq be related to an amount of sulfuric acid? |
|||
|
|
Member |
Saw this blurb in the latest C&E News:
Sugary catalyst for biodiesel A new solid acid catalyst for making the increasingly popular fuel biodiesel trumps other catalysts, report Masakazu Toda at Tokyo Institute of Technology in Yokohama and colleagues. Made from sulfonated burnt sugar, the catalyst is inexpensive and recyclable and keeps working at temperatures up to 180 °C (Nature 2005, 438, 178). Unlike sulfuric acid, the commonly used catalyst, the new catalyst is environmentally friendly; and because it's solid, it doesn't require separation. It's also up to eight times more active than other solid acid catalysts, such as the expensive Nafion, made by DuPont. The Japanese group first partially carbonizes sugar, starch, or cellulose. The reaction generates polycyclic aromatic carbon sheets, which are then sulfonated with sulfuric acid to produce sheets of amorphous carbon impregnated with hydroxyl, carboxyl, and sulfonite (SO3H) groups. The resulting black powder can be made into hard pellets or thin films. That is a useful property for large-scale biodiesel production, notes James G. Goodwin, chair of the chemical and biomolecular engineering department at Clemson University, in South Carolina. Mark |
|||
|
|
Member |
Dou you think this procedure could be done simply for home use?
http://www.nature.com/nature/journal/v438/n7065/extref/438178a-s1.doc |
|||
|
|
member |
They're working on answering that in a different infopop thread: http://biodiesel.infopop.cc/eve/forums/a/tpc/f/4196...341082341#7341082341 Kumar Plocher Yokayo Biofuels Fueled for Thought blog .........../ \.............. fueling / R \ evolution since 2001 '''''''''''''/____\''''''''''''''''''' Sustainable Biodiesel...  |
|||
|
|
Member |
2g is 0.02mol {2g/(98g/mol)} H2SO4-> 2H(+) + SO4(2-) therefore 2 eq H(+) / mole H2SO4 that means 0.04 eq / (liter of batch) Reacting with the FFA doesn't use up the H+ site. It can go batch after batch, unless it is neutralized by a salt or a base or destroyed by some other means (chemical / temperature). Since it remains with the resin, the wet meoh doesn't have catalyst in it when it is separated. Andy |
|||
|
|
Member |
I made some of this stuff a couple of years ago and at first it worked great, but only managed to repeat the success once afterwards. Some other people reported the same experience. I only found the explanation over a year later, that the catalyst only works with WVO which has >30% Free Fatty Acids. It is really meant for converting FFAs to FAME. |
|||
|
|
Member |
I was at the show and had a talk with a Resin guy and how i understand how it works in non-technical terms:
Basically you add methanol to your oil and then run it through the catalyst, as you run it thru it disolves as it reacts with the Free Fatty Acids turning them over to Methly Esters. The question I could not get answered was the sizing of equipment and the specification of the equipment (ASME Cert, pressure, temp ETC) I think the big question is how much does it cost and at what quatities do they sell it in? |
|||
|
|
Member |
It is my understandingafter talking to someof the reps at the conf. that as with standard acid/base method, water is produced using the solid acid catalyst...so the trick again becomes removing water between acid and base stages.
One can flash off water/methanol after acid stage. Use new methanol for base stage. Dry the acid stage methanol offline and return to methanol supply. Flashing of the acid stage methanol and drying it remains the challenge...technically, economically, and efficiently. |
|||
|
|
Member |
I dont think its economically viabe to demeth and dewater just to remove such small amount of water. If there is significant water in what will be a mixture of oil, FAME, Methanol and water it might work just to pass the lot thru something like anhydrous calcium sulphate, which will absorb all the water and a maybe small amount of the methanol.
|
|||
|
| Previous Topic | Next Topic | powered by eve community |
 | Please Wait. Your request is being processed... |
|
|||
| Site | Biodiesel & SVO Home | ||
| Servlet | eve2da018 | ||
| Version | 1.2.22 build 9062 | ||
| Module | Forums 4.0.3 | ||
| Stylesheet | "Category Amazon banner" | ||
| Wordlet Set | "Default Wordlet Set" | ||
|
© Maui Green Energy 2000 - 2008