Lanthanum phosphate: an efficient catalyst for acrylic acid production through lactic acid dehydration

An acrylic acid yield of 74.3% and a formation rate of 12.0 mmol gcat−1 h−1 have been achieved at 340 °C by lactic acid dehydration over Na2HPO4-modified NaY nanocrystallites (NaY-n) due to appropriate surface acidity together with the unique structural features of NaY-n.

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Dehydration of lactic acid to acrylic acid over lanthanum phosphate catalysts: the role of Lewis acid sites

Physical Chemistry Chemical Physics ◽

10.1039/c6cp04163a ◽

2016 ◽

Vol 18 (34) ◽

pp. 23746-23754 ◽

Cited By ~ 19

Author(s):

Zhen Guo ◽

De Sheng Theng ◽

Karen Yuanting Tang ◽

Lili Zhang ◽

Lin Huang ◽

...

Keyword(s):

Lactic Acid ◽

Acrylic Acid ◽

Lewis Acid ◽

Acid Sites ◽

Lewis Acid Sites ◽

Lanthanum Phosphate ◽

Lewis Acidic Sites ◽

Acidic Sites ◽

Nano Rods

Lewis acidic sites on the surface of lanthanum phosphate nano-rods play a crucial role on the catalytic dehydration of lactic acid to acrylic acid.

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Acrylic Acid Production by Gas-Phase Dehydration of Lactic Acid over K+-Exchanged ZSM-5: Reaction Variable Effects, Kinetics, and New Evidence for Cooperative Acid–Base Bifunctional Catalysis

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.0c02148 ◽

2020 ◽

Vol 59 (39) ◽

pp. 17417-17428 ◽

Cited By ~ 3

Author(s):

Bo Yan ◽

Zong-Hui Liu ◽

Yu Liang ◽

Bo-Qing Xu

Keyword(s):

Lactic Acid ◽

Acrylic Acid ◽

Gas Phase ◽

Acid Production ◽

Bifunctional Catalysis ◽

Acid Base ◽

New Evidence

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Comparative study of gas-phase “dehydration” of alkyl lactates and lactic acid for acrylic acid production over hydroxyapatite catalysts

Molecular Catalysis ◽

10.1016/j.mcat.2020.111098 ◽

2020 ◽

Vol 494 ◽

pp. 111098 ◽

Cited By ~ 3

Author(s):

Zong-Hui Liu ◽

Bo Yan ◽

Yu Liang ◽

Bo-Qing Xu

Keyword(s):

Lactic Acid ◽

Acrylic Acid ◽

Comparative Study ◽

Gas Phase ◽

Acid Production

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Magnesium Hydrogen Phosphate: An Efficient Catalyst for Acrylic Acid Production from Biorenewable Lactic Acid

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2021.19019 ◽

2021 ◽

Vol 21 (3) ◽

pp. 1537-1548

Author(s):

Nagaraju Nekkala ◽

Putrakumar Balla ◽

Srinivasarao Ginjupalli ◽

Harisekher Mitta ◽

S. K. Hussain ◽

...

Keyword(s):

Lactic Acid ◽

Acrylic Acid ◽

Biomass Conversion ◽

Catalytic Performance ◽

Hydrogen Phosphate ◽

Efficient Catalyst ◽

Synthetic Process ◽

Calcination Temperatures ◽

Lewis Acidic Sites ◽

Acidic Sites

A series of Magnesium hydrogen phosphate (MgHP) catalysts with different magnesium to phosphorous (Mg/P) mole ratios at varying calcination temperatures has been synthesised, bearing in mind the effectiveness as well as the stability of MgHP to catalyse acrylic acid (AA) production from biorenewable lactic acid (LA), a synthetic process applicable to biomass conversion. The physicochemical properties of the MgHP catalysts have been thoroughly characterised and the formation of Mg(NH4)PO4, MgHPO4 and Mg2P2O7 with different structural and acidic properties have been reported. The high catalytic performance of MgHP catalysts with high AA yields (100% conversion and 85% selectivity) at high space velocities (WHSVLA = 3.13 h−1) have been achieved at 360 °C. NH3-Temperature programmed desorption (TPD) and pyridine FTIR have shown that the effectiveness of a catalyst is accounted for not primarily by the actual strength of acidic sites, but is due to the presence of Lewis acidic sites compared to Bronsted sites.

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