Steam - 22-9-2019 at 16:46
Hello all,
I have some wood chips which I am trying to react with an organic vapor at temperatures from 50C to 200C. I am trying to study the effect of
temperature on the end product. I am running my experiments for up to two days and the volume of the wood chips is roughly 25 mL.
I have a tube furnace which 'kind-of' works- needs a new tube and stuff, but I feel like this is totally overkill. Thus I am consulting the free
advice and experience of this community if you all know of any easy way to do this.
I would like to recycle the unused organic if I could, so direct discharge to the atmosphere is out of the question. I am also tying to run this
reaction in the gas phase (no liquids)so as they are set up, something like a soxhlet is out of the question since the standing liquid phase would be
counterproductive to what I am trying to test.
Perhaps there is some esoteric piece of glassware out there that is made for this application?
XeonTheMGPony - 23-9-2019 at 16:33
Can you draw a basic concept schematic?
and what is your fabrication ability and supply access.
Sulaiman - 23-9-2019 at 17:27
200oC is just ok for a cooking oil bath and a ptfe stirbar,
the flask may be scratched after days of dry stirring,
but all can be done with common lab equipment,
e.g. hotplate/stirrer, cooking oil, thermometer, flask with woodchips and gas,
what is the difficulty ?
Steam - 24-9-2019 at 15:50
Sorry,I guess I could have been a bit more clear.
Here is what I have come up with thus far (reactor on the right)... A 1L reaction kettle with a series of micro sieves holding up the wood chips off
the bottom. I have an air condenser + addition funnel off to the side. I have a thermocouple adapter at the height of the the top of the sieve tower.
All of this is insulated with foil so that the temperature reading off the thermocouple is above the boiling point of the organic.
The down side to this set up is that I have no way to ensure/ control flow of the organic as well as limited temperature control.
I hope this helps. (sorry for the messy fume-hood, it was clean yesterday 
)
Edit: I have access to full machine shop for fabrication, and as for supplies I can order form all the usual scumbags (Sigma, Alfa, etc..).
[Edited on 24-9-2019 by Steam]
[Edited on 24-9-2019 by Steam]
[Edited on 24-9-2019 by Steam]