Abstract
Glycerine is a by-product from biodiesel production. After transesterification using methanol, the oil from Jatropha seeds produces high amounts of stearic and palmitic methyl esters and about 10%wt. in glycerol. This chapter deals with the different aspects of the valorization of glycerine for the production of propylene glycol (1,2-PD). After introducing the subject, we evaluate the glycerol and 1,2-PD markets, particularly for pharmaceutical use. We then describe the processes of aqueous-phase hydrogenolysis (APH), aqueous-phase reforming (APR), and catalytic hydrogen transfer (CTH) applied to glycerol and describe some thermodynamics aspects and metal catalysts applied to these processes. Finally, we discuss some detailed kinetic models and application of molecular modeling to this reaction.
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