I have agro wastes in lab which has to be converted to biochar. I am seeking advice on how to successfully carry out pyrolysis at 650 degree C in a muffle furnace. I am using Alumina crucible with alumina lid for charring the plant material. What are some ways by which small amount of oxygen which may enter inside the crucible can be avoided to enter inside?
Please check the following links and PDF attachment.
https://www.researchgate.net/post/How_do_we_make_biochars_in_laboratory
https://www.researchgate.net/post/Biochar_Production_Using_Furnance
https://www.researchgate.net/publication/256855215_Hydrologic_properties_of_biochars_produced_at_different_temperatures
Article Hydrologic properties of biochars produced at different temperatures
I guess that you want to make biochars to study adsorption (directly or indirectly) please, check following article:
http://www.biochar-international.org/sites/default/files/How_to_make_high_and_low_adsorption_biochars_for_small_research_studies.pdf
You may require Hydrothermal reactor to convert agrowastes into biochar.I suppose no need to process at 650 0C-Many process problems.
pl read : http://www.sciencedirect.com/science/article/pii/S2215098616303585
The muffle furnace is designed in such a way that it does not allow inflow of air/oxygen. Aside from the oxygen that may be trapped in your container when filling it with the sample, which is should be quite negligible since you are using a small sample, then you should not worry so much about the oxygen
with muffle furnace you need to attach nitrogen cylinder by special arrangement and purge muffle furnace with nitrogen for about 30 minutes with a reasonable flow rate.However, I prepared biomass char ;For char preparation, a uniform heating rate of 20oC min-1 from 105oC to 950oC with a 30 min hold up at 950oC temperature in an inert atmosphere of nitrogen was used in a Stanton Redcroft 1000-TGA. In the case of biomass samples, a number of runs were carried out to prepare samples of chars (12–16 mg). The char particles were found in the size range of 200–300 µm.
Moreover, you can also see our article;
https://www.researchgate.net/publication/248354137_Char_oxidation_study_of_sugar_cane_bagasse_cotton_stalk_and_Pakistani_coal_under_1_and_3_oxygen_concentrations?ev=prf_pub
Article Char oxidation study of sugar cane bagasse, cotton stalk and...
Hi Eric, I recommend writing a brand new question to get the best response.
Good luck!
-Steve
- Badges
- Science method
- Similar topics
- Biological Science
- Ecology