Cs promoted triglyceride transesterification over MgO nanocatalysts

Janine M. Montero; Karen Wilson; Adam F. Lee

doi:10.1007/s11244-010-9461-4

Cs promoted triglyceride transesterification over MgO nanocatalysts

Janine M. Montero, Karen Wilson, Adam F. Lee

Research output: Contribution to journal › Article › peer-review

Abstract

The influence of Cs on the structure and basicity of nanocrystalline MgO was assessed via electron microscopy, CO₂ chemisorption, XRD and XPS. Caesium incorporation via co-precipitation under supercritical conditions generates Cs₂Mg(CO₃)₂ nanocrystallites with an enhanced density and strength of surface base sites. Wet impregnation proved less effective for modifying MgO nanocrystals. A strong synergy between Cs and Mg components in the co-precipitated material dramatically enhanced the rate of tributyrin transesterification with methanol relative to undoped MgO and homogeneous Cs₂CO₃ catalysts. On-stream deactivation of Cs-doped MgO reflects heavy surface carbon deposition and loss of the high activity Cs₂Mg(CO₃)₂ phase due to limited Cs dissolution.

Original language	English
Pages (from-to)	737-745
Number of pages	9
Journal	Topics in Catalysis
Volume	53
Issue number	11-12
Early online date	26 Mar 2010
DOIs	https://doi.org/10.1007/s11244-010-9461-4
Publication status	Published - 1 Jul 2010

Keywords

Alkali metal-doping
basicity
biodiesel
catalysis
nanocrystalline MgO
transesterification

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10.1007/s11244-010-9461-4

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title = "Cs promoted triglyceride transesterification over MgO nanocatalysts",

abstract = "The influence of Cs on the structure and basicity of nanocrystalline MgO was assessed via electron microscopy, CO2 chemisorption, XRD and XPS. Caesium incorporation via co-precipitation under supercritical conditions generates Cs2Mg(CO3)2 nanocrystallites with an enhanced density and strength of surface base sites. Wet impregnation proved less effective for modifying MgO nanocrystals. A strong synergy between Cs and Mg components in the co-precipitated material dramatically enhanced the rate of tributyrin transesterification with methanol relative to undoped MgO and homogeneous Cs2CO3 catalysts. On-stream deactivation of Cs-doped MgO reflects heavy surface carbon deposition and loss of the high activity Cs2Mg(CO3)2 phase due to limited Cs dissolution.",

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T1 - Cs promoted triglyceride transesterification over MgO nanocatalysts

AU - Montero, Janine M.

AU - Wilson, Karen

AU - Lee, Adam F.

PY - 2010/7/1

Y1 - 2010/7/1

N2 - The influence of Cs on the structure and basicity of nanocrystalline MgO was assessed via electron microscopy, CO2 chemisorption, XRD and XPS. Caesium incorporation via co-precipitation under supercritical conditions generates Cs2Mg(CO3)2 nanocrystallites with an enhanced density and strength of surface base sites. Wet impregnation proved less effective for modifying MgO nanocrystals. A strong synergy between Cs and Mg components in the co-precipitated material dramatically enhanced the rate of tributyrin transesterification with methanol relative to undoped MgO and homogeneous Cs2CO3 catalysts. On-stream deactivation of Cs-doped MgO reflects heavy surface carbon deposition and loss of the high activity Cs2Mg(CO3)2 phase due to limited Cs dissolution.

AB - The influence of Cs on the structure and basicity of nanocrystalline MgO was assessed via electron microscopy, CO2 chemisorption, XRD and XPS. Caesium incorporation via co-precipitation under supercritical conditions generates Cs2Mg(CO3)2 nanocrystallites with an enhanced density and strength of surface base sites. Wet impregnation proved less effective for modifying MgO nanocrystals. A strong synergy between Cs and Mg components in the co-precipitated material dramatically enhanced the rate of tributyrin transesterification with methanol relative to undoped MgO and homogeneous Cs2CO3 catalysts. On-stream deactivation of Cs-doped MgO reflects heavy surface carbon deposition and loss of the high activity Cs2Mg(CO3)2 phase due to limited Cs dissolution.

KW - Alkali metal-doping

KW - basicity

KW - biodiesel

KW - catalysis

KW - nanocrystalline MgO

KW - transesterification

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UR - http://link.springer.com/article/10.1007%2Fs11244-010-9461-4

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DO - 10.1007/s11244-010-9461-4

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AN - SCOPUS:78049316277

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SP - 737

EP - 745

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 11-12

ER -

Cs promoted triglyceride transesterification over MgO nanocatalysts

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