Monday, October 15, 2007

Cellulose thermal stability, decomposition

Finally found the info no wikipaedia has.

Temperatures where thermal degradation starts:
Hemicellulose - 170°C-240°C
Cellulose 250°C-350°C
Lignine 300°C-400°C

This is surprising to me, since the lignine fibres are the first to decompose under sunshine. Newspaper have high lignine content.

Why do I bring this? Well, microcellulose is available in several grades of quality. Both in fibre sizes and in chemical type. Next, cellulose is also a sugar, a carbohydrate, so you can make very similar rocket fuel as with other, simpler sugars, like dextrose and saccharose for example. This time you are not going to melt the sugar, but the oxidiser, AN for example. The microcellulose is used for making epoxy slurries that do not flow. So, I may try it one day mixing in molten AN fertiliser... one day when I will gave any good electric melter. The link to the data source is HERE. It is about "softwood thermal degradation".

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