Bio-glycerol is considered as high boiling polar triol and immiscible with fossil fuel
fractions due to which it is transformed into its respective ketals and acetals which help to
improve the quality of diesel emitting less amount of aldehydes and carbon monoxide.
Solketal visual appearance is transparent and it is odorless organic liquid used as fuel
additive for diesel to improve its cold flow properties. Condensation of bio-glycerol with bio-
acetone in presence of beta zeolite has been done for synthesising solketal.