Vapor-Phase Deoxygenation of Lactic Acid to Biopropionic Acid over Dispersant-Enhanced Molybdenum Oxide Catalyst

Propionic acid obtained from fermentation-derived lactic acid has been appreciated since propionic acid is mainly used as a food preservative, satisfying a natural food idea. Vapor-phase deoxygenation of lactic acid to biopropionic acid over dispersant-dispersed molybdenum oxides was investigated in...

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Published inIndustrial & engineering chemistry research Vol. 58; no. 1; pp. 101 - 109
Main Authors Li, Xinli, Pang, Jun, Zhang, Ju, Yin, Chunyu, Zou, Weixin, Tang, Congming, Dong, Lin
Format Journal Article
LanguageEnglish
Published American Chemical Society 09.01.2019
Subjects
acid treatment
acrylic acid
catalysts
catalytic activity
dispersants
durability
food preservatives
hydrogen
hydrogenation
lactic acid
molybdenum
oxides
process design
propionic acid
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Abstract Propionic acid obtained from fermentation-derived lactic acid has been appreciated since propionic acid is mainly used as a food preservative, satisfying a natural food idea. Vapor-phase deoxygenation of lactic acid to biopropionic acid over dispersant-dispersed molybdenum oxides was investigated in this work. It was found that different dispersants displayed different performances, and the N element in dispersants had a positive effect. MoO3 was soon reduced to MoO2 under the in situ hydrogen atmosphere, and the latter played an important role in catalytic conversion of lactic acid to propionic acid. The discriminating experiments revealed that propionic acid was formed mainly through direct deoxygenation of lactic acid (main path) and not hydrogenation of acrylic acid as an intermediate (minor path). Furthermore, only in situ hydrogen was efficient, and external hydrogen was hardly efficient during catalytic reaction. Under the base-free conditions, catalyst offered excellent activity and durability and efficiently reduced the acid-treatment section in product separation.
AbstractList Propionic acid obtained from fermentation-derived lactic acid has been appreciated since propionic acid is mainly used as a food preservative, satisfying a natural food idea. Vapor-phase deoxygenation of lactic acid to biopropionic acid over dispersant-dispersed molybdenum oxides was investigated in this work. It was found that different dispersants displayed different performances, and the N element in dispersants had a positive effect. MoO3 was soon reduced to MoO2 under the in situ hydrogen atmosphere, and the latter played an important role in catalytic conversion of lactic acid to propionic acid. The discriminating experiments revealed that propionic acid was formed mainly through direct deoxygenation of lactic acid (main path) and not hydrogenation of acrylic acid as an intermediate (minor path). Furthermore, only in situ hydrogen was efficient, and external hydrogen was hardly efficient during catalytic reaction. Under the base-free conditions, catalyst offered excellent activity and durability and efficiently reduced the acid-treatment section in product separation.
Propionic acid obtained from fermentation-derived lactic acid has been appreciated since propionic acid is mainly used as a food preservative, satisfying a natural food idea. Vapor-phase deoxygenation of lactic acid to biopropionic acid over dispersant-dispersed molybdenum oxides was investigated in this work. It was found that different dispersants displayed different performances, and the N element in dispersants had a positive effect. MoO₃ was soon reduced to MoO₂ under the in situ hydrogen atmosphere, and the latter played an important role in catalytic conversion of lactic acid to propionic acid. The discriminating experiments revealed that propionic acid was formed mainly through direct deoxygenation of lactic acid (main path) and not hydrogenation of acrylic acid as an intermediate (minor path). Furthermore, only in situ hydrogen was efficient, and external hydrogen was hardly efficient during catalytic reaction. Under the base-free conditions, catalyst offered excellent activity and durability and efficiently reduced the acid-treatment section in product separation.
Author Zhang, Ju
Zou, Weixin
Pang, Jun
Yin, Chunyu
Dong, Lin
Li, Xinli
Tang, Congming
AuthorAffiliation Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province
School of Chemistry and Chemical Engineering
Jiangsu Key Laboratory of Vehicle Emissions Control, Center of Modern Analysis
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Snippet Propionic acid obtained from fermentation-derived lactic acid has been appreciated since propionic acid is mainly used as a food preservative, satisfying a...
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SubjectTerms acid treatment
acrylic acid
catalysts
catalytic activity
dispersants
durability
food preservatives
hydrogen
hydrogenation
lactic acid
molybdenum
oxides
process design
propionic acid
Title Vapor-Phase Deoxygenation of Lactic Acid to Biopropionic Acid over Dispersant-Enhanced Molybdenum Oxide Catalyst
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