Nb2O5/SBA-15 catalyzed propanoic acid esterification

Ângela Silva; Karen Wilson; Adam F. Lee; Vannia Cristina dos Santos; Ana Carolina Cons Bacilla; Karen Mary Mantovani; Shirley Nakagaki

doi:10.1016/j.apcatb.2016.12.066

Nb₂O₅/SBA-15 catalyzed propanoic acid esterification

Ângela Silva, Karen Wilson, Adam F. Lee, Vannia Cristina dos Santos, Ana Carolina Cons Bacilla, Karen Mary Mantovani, Shirley Nakagaki^*

^*Corresponding author for this work

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

Abstract

A family of niobia (Nb₂O₅) functionalized SBA-15 solid catalysts have been prepared via wet impregnation with NbCl₅ (2–32 wt% Nb) and subsequent thermal processing, for application in the acid catalyzed esterification of propanoic acid with methanol. Bulk and surface physicochemical characterization revealed that highly dispersed niobia species present at low loadings when calcined at 500 °C exhibit strong Brönsted acid character and associated activity for esterification. Increased calcination temperatures are found to result in a decrease in Brönsted:Lewis acid ratio associated with recrystallization of the niobia phase leading to a loss of catalyst activity. Esterification activity is found to be directly proportional to Brönsted:Lewis acid ratio, with the 2 wt% Nb/SBA-15 catalyst pre-calcined at 500 °C found to exhibit highest activity and excellent reusability without deactivation.

Original language	English
Pages (from-to)	498-504
Number of pages	7
Journal	Applied Catalysis B: Environmental
Volume	205
Early online date	29 Dec 2016
DOIs	https://doi.org/10.1016/j.apcatb.2016.12.066
Publication status	Published - 15 May 2017

Bibliographical note

© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/

Funding: CAPES (Coordenação de Aperfeiçoamento de Pessoalde Nível Superior), CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico); Fundação Araucária; EPSRC (EP/K014706/1, EP/K014749/1 and EP/G007594/4); and the Royal Society for an Industry Fellowship.

Keywords

acid solid
biodiesel
esterification
heterogeneous catalysis
niobium
SBA-15

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10.1016/j.apcatb.2016.12.066

Catalyzed propanoic acid esterification
© 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Final published version, 982 KBLicence: CC BY-NC-ND 3.0

Cite this

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title = "Nb2O5/SBA-15 catalyzed propanoic acid esterification",

abstract = "A family of niobia (Nb2O5) functionalized SBA-15 solid catalysts have been prepared via wet impregnation with NbCl5 (2–32 wt% Nb) and subsequent thermal processing, for application in the acid catalyzed esterification of propanoic acid with methanol. Bulk and surface physicochemical characterization revealed that highly dispersed niobia species present at low loadings when calcined at 500 °C exhibit strong Br{\"o}nsted acid character and associated activity for esterification. Increased calcination temperatures are found to result in a decrease in Br{\"o}nsted:Lewis acid ratio associated with recrystallization of the niobia phase leading to a loss of catalyst activity. Esterification activity is found to be directly proportional to Br{\"o}nsted:Lewis acid ratio, with the 2 wt% Nb/SBA-15 catalyst pre-calcined at 500 °C found to exhibit highest activity and excellent reusability without deactivation.",

keywords = "acid solid, biodiesel, esterification, heterogeneous catalysis, niobium, SBA-15",

author = "{\^A}ngela Silva and Karen Wilson and Lee, {Adam F.} and {dos Santos}, {Vannia Cristina} and {Cons Bacilla}, {Ana Carolina} and Mantovani, {Karen Mary} and Shirley Nakagaki",

note = "{\textcopyright} 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: CAPES (Coordena{\c c}{\~a}o de Aperfei{\c c}oamento de Pessoalde N{\'i}vel Superior), CNPq (Conselho Nacional de Desenvolvimento Cient{\'i}fico e Tecnol{\'o}gico); Funda{\c c}{\~a}o Arauc{\'a}ria; EPSRC (EP/K014706/1, EP/K014749/1 and EP/G007594/4); and the Royal Society for an Industry Fellowship.",

year = "2017",

month = may,

day = "15",

doi = "10.1016/j.apcatb.2016.12.066",

language = "English",

volume = "205",

pages = "498--504",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

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T1 - Nb2O5/SBA-15 catalyzed propanoic acid esterification

AU - Silva, Ângela

AU - Wilson, Karen

AU - Lee, Adam F.

AU - dos Santos, Vannia Cristina

AU - Cons Bacilla, Ana Carolina

AU - Mantovani, Karen Mary

AU - Nakagaki, Shirley

N1 - © 2017, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Funding: CAPES (Coordenação de Aperfeiçoamento de Pessoalde Nível Superior), CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico); Fundação Araucária; EPSRC (EP/K014706/1, EP/K014749/1 and EP/G007594/4); and the Royal Society for an Industry Fellowship.

PY - 2017/5/15

Y1 - 2017/5/15

N2 - A family of niobia (Nb2O5) functionalized SBA-15 solid catalysts have been prepared via wet impregnation with NbCl5 (2–32 wt% Nb) and subsequent thermal processing, for application in the acid catalyzed esterification of propanoic acid with methanol. Bulk and surface physicochemical characterization revealed that highly dispersed niobia species present at low loadings when calcined at 500 °C exhibit strong Brönsted acid character and associated activity for esterification. Increased calcination temperatures are found to result in a decrease in Brönsted:Lewis acid ratio associated with recrystallization of the niobia phase leading to a loss of catalyst activity. Esterification activity is found to be directly proportional to Brönsted:Lewis acid ratio, with the 2 wt% Nb/SBA-15 catalyst pre-calcined at 500 °C found to exhibit highest activity and excellent reusability without deactivation.

AB - A family of niobia (Nb2O5) functionalized SBA-15 solid catalysts have been prepared via wet impregnation with NbCl5 (2–32 wt% Nb) and subsequent thermal processing, for application in the acid catalyzed esterification of propanoic acid with methanol. Bulk and surface physicochemical characterization revealed that highly dispersed niobia species present at low loadings when calcined at 500 °C exhibit strong Brönsted acid character and associated activity for esterification. Increased calcination temperatures are found to result in a decrease in Brönsted:Lewis acid ratio associated with recrystallization of the niobia phase leading to a loss of catalyst activity. Esterification activity is found to be directly proportional to Brönsted:Lewis acid ratio, with the 2 wt% Nb/SBA-15 catalyst pre-calcined at 500 °C found to exhibit highest activity and excellent reusability without deactivation.

KW - acid solid

KW - biodiesel

KW - esterification

KW - heterogeneous catalysis

KW - niobium

KW - SBA-15

UR - http://doi.org/10.17036/researchdata.aston.ac.uk.00000188

UR - http://www.scopus.com/inward/record.url?scp=85008220574&partnerID=8YFLogxK

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DO - 10.1016/j.apcatb.2016.12.066

M3 - Article

SN - 0926-3373

VL - 205

SP - 498

EP - 504

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

ER -

Nb₂O₅/SBA-15 catalyzed propanoic acid esterification

Abstract

Bibliographical note

Keywords

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