Kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol

Research output: Contribution to journalArticle

  • 39 Citations

Abstract

The kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol over a 5 wt % Ru/carbon catalyst have been characterized in a stirred batch reactor. A thorough analysis of mass-transfer resistances based on measurements of hydrogen solubility and gas - liquid mass-transfer coefficients, application of correlations in the literature, and intraparticle diffusion calculations show that mass-transfer resistances are negligible at the temperatures (403-423 K) and hydrogen pressures (6.8-13.6 MPa) studied. A Langmuir - Hinshelwood (L - H)model is proposed and used to fit lactic acid conversion kinetics. The kinetic model provides insight into the catalytic reaction mechanism and forms the basis for design and further investigation of the aqueous-phase hydrogenation.

LanguageEnglish (US)
Pages691-696
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume41
Issue number4
StatePublished - Feb 20 2002

Profile

Propylene Glycol
Lactic acid
Glycols
Hydrogenation
Propylene
mass transfer
Lactic Acid
Mass transfer
kinetics
Kinetics
Hydrogen
acid
hydrogen
Batch reactors
solubility
Carbon
Solubility
Gases
catalyst
Catalysts

ASJC Scopus subject areas

  • Polymers and Plastics
  • Environmental Science(all)
  • Chemical Engineering (miscellaneous)

Cite this

Kinetics of aqueous-phase hydrogenation of lactic acid to propylene glycol. / Zhang, Zhigang; Jackson, James E.; Miller, Dennis J.

In: Industrial and Engineering Chemistry Research, Vol. 41, No. 4, 20.02.2002, p. 691-696.

Research output: Contribution to journalArticle

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