fulltext.study @t Gmail

Glycerol hydrogenolysis to 1, 2 propanediol over Ru/C catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
51166 46833 2010 5 PDF Available
Title
Glycerol hydrogenolysis to 1, 2 propanediol over Ru/C catalyst
Abstract

Optimal experimental conditions for catalytic conversion of glycerol to 1,2 propanediol over catalyst Ru/C are investigated. Results indicate that glycerol hydrogenolysis is the result of two reaction stages: dehydration to acetol and hydrogenation to 1,2 propanediol. Use of a cationic exchange resin improves the dehydration stage, providing higher conversion and selectivity to 1,2 propanediol.Division of the reaction time into a dehydration period (under a nitrogen atmospheric pressure) and a hydrogenation period (under a hydrogen atmosphere of 60 bar) is essayed. This sequential stage reaction process provides lower glycerol conversion but increases the selectivity ratio between 1,2 propanediol and the main liquid by-product, ethylenglycol.The influence of two relevant variables in this process, H2/glycerol ratio and initial glycerol concentration, is analysed. Increasing the H2/glycerol ratio increases glycerol conversion, although it also causes higher production of unfavourable ethylenglycol. Ethylenglycol production is reduced when the glycerol concentration increases. A balance between conversion and selectivity is necessary in order to select optimal reaction conditions.

Graphical AbstractFigure optionsDownload full-size imageDownload as PowerPoint slideResearch highlights► Addition of an acid catalyst increases selectivity to 1,2 propanediol. ► Sequential method (N2 + H2) decreases the glycerol conversion. ► Sequential method doubles the 1,2 propanediol / ethylenglycol selectivity ratio. ► Using 80wt% glycerol, 0,4 H2/glycerol ratio optimizes 1,2 propanediol production.

Keywords
Glycerol; Hydrogenolysis; Ru/C catalyst; 1,2 propanediol; Ethylenglycol
First Page Preview
Glycerol hydrogenolysis to 1, 2 propanediol over Ru/C catalyst
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 12, Issue 2, 15 November 2010, Pages 122–126
Authors
, , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us