Table 5.

Maturity level of renewable propylene glycol production

Level of maturity	Renewable propylene glycol production process	References
Lab scale	•Glycerol, glucose, lactose fermentation •Cellulose hydrogenolysis •Glucose hydrogenolysis •Lactic acid hydrogenolysis •CTH hydrogenolysis •Integrated thermochemical gasification and glycerol hydrogenolysis	Clomburg and Gonzalez, (2011) Marchesan et al., (2019) Veeravalli and Mathews, (2018) Xi et al., (2011) Xiao et al., (2013)
Pilot scale	•Xylitol hydrogenolysis	Rosales-Calderon and Arantes, (2019)
Demonstration scale	NA
Commercial scale	•Glycerol hydrogenolysis •Sorbitol hydrogenolysis	Marchesan et al., (2019)

NA, Not available.