Hi all,

I'm attempting to produce activated carbon material from cellulosic sources. I'm mixing cellulose nanocrystals (Celluforce, sodium sulfate half-ester CNC) with microcrystalline cellulose (Avicel) at a ratio of 1:9, respectively.

Here's the process I follow:

However, I've encountered a peculiar issue. When I remove my sample from the tube furnace as it reaches room temperature, the crucible is initially cold. However, it suddenly heats up rapidly and the activated carbon seems to self-ignite, resulting in a loss of the produced material.

I'm wondering if anyone else has experienced this issue before and what might be causing it. Additionally, if you have any suggestions on how to prevent this problem, I would greatly appreciate your input.

I've attached a video of this phenomenon for reference.

Thank you all.