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=== Alkali === | === Alkali === | ||
'''Alkaline hydrolysis''' refers to | '''Alkaline hydrolysis''' refers to hydrolysis reactions using hydroxide, commonly from sodium hydroxide or calcium hydroxide. The hydroxide breaks down the lignin bonds to make the cellulose more accessible. The reaction proceeds at lower temperature and pressure and residual alkali can be recycled. However, the pretreatment does result in irrecoverable salts in the product.<ref>{{Cite journal|title=Pretreatment of lignocellulosic sugarcane leaves and tops for bioethanol production|year=2020-01-01|journal=Lignocellulosic Biomass to Liquid Biofuels|page=301–324|doi=10.1016/B978-0-12-815936-1.00010-1|author=S. Niju, M. Swathika, M. Balajii|volume=}}</ref> | ||
=== Salt === | === Salt === | ||
Hydrolysis can be further improved by the addition of salts. | Hydrolysis can be further improved by the addition of salts, such as metal salts or sulphite salts. | ||
==== Metals salts ==== | ==== Metals salts ==== |