Cellulose is a highly desirable biopolymer which has many applications in modern technologies. But, cellulose has lignin and hemicellulose which is undesirable for applications like energy harvesting. So, how do we remove these materials from cellulose?
The lignin and hemicellulose from lignocellulosic material can be removed by using various chemical cum mechanical methods such as acid-alkali treatment, acid hydrolysis etc. For more information, you can check the following article:
Article Fluconazole-loaded TEOS-modified nanocellulose 3D scaffolds ...
Kraft pulping will degrade hemicellulose. There has been quite a bit of research in methods of preserving this valuable carbohydrate. This has been accomplished through water or acid prehydrolysis. Not sure I understand your statement regarding energy - lignin is what is currently burned in Kraft recovery boilers to produce steam.
Article On the recovery of hemicellulose before kraft pulping
https://www1.eere.energy.gov/manufacturing/resources/forest/pdfs/hemicellulose_extraction.pdf
Extraction of Hemicellulose from Loblolly Pine Woodchips and Subsequent Kraft Pulping | Request PDF (researchgate.net)
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