CeαMn1-αO2 CATALYSTS SUPPORTED over g-Al2O3 PREPARED by MODIFIED REDOX-COPRECIPITATION METHODS for n-HEXANE COMBUSTION

Jesus Rojas Quispe; Rómulo Cruz; Rosario Sun Kou; Gino Picasso-Escobar

CeαMn1-αO2 CATALYSTS SUPPORTED over g-Al2O3 PREPARED by MODIFIED REDOX-COPRECIPITATION METHODS for n-HEXANE COMBUSTION

Jesus Rojas Quispe, Rómulo Cruz, Rosario Sun Kou, Gino Picasso-Escobar

Sección de Química

Universidad Nacional de Ingenieria, Lima

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

3 Scopus citations

Abstract

A series of CeαMn1-αO2 catalysts supported on g-alumina with various molar concentrations of Ce (α, from 0 to 0.90) was synthesized by coprecipitation, applying two different precipitating agents, namely, sodium hydroxide (method 1) and sodium carbonate (method 2), with the use of sodium permanganate as a redox agent for precipitation. XRD profiles of the supported samples revealed the predominant abundance of a typical fluorite crystalline structure. TPR thermograms of supported samples were displaced towards lower temperatures with increasing Mn concentration, in contrast with the bulk samples. The supported Ce-Mn samples exhibited a greater performance in n-hexane elimination than did the corresponding simple oxides. The sample Ce0.33Mn0.67O2 obtained by method 2 presented the best activity, probably due to the enrichment of Ce4+, Mn3+ and Mn4+ surface species, an excess of superficial oxygen species and an easy reducibility as well as the lowest apparent activation energy.

Original language	Spanish
Pages (from-to)	391-398
Number of pages	8
Journal	Quimica Nova
Volume	43
State	Published - 1 Apr 2020

Cite this

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title = "CeαMn1-αO2 CATALYSTS SUPPORTED over g-Al2O3 PREPARED by MODIFIED REDOX-COPRECIPITATION METHODS for n-HEXANE COMBUSTION",

abstract = "A series of CeαMn1-αO2 catalysts supported on g-alumina with various molar concentrations of Ce (α, from 0 to 0.90) was synthesized by coprecipitation, applying two different precipitating agents, namely, sodium hydroxide (method 1) and sodium carbonate (method 2), with the use of sodium permanganate as a redox agent for precipitation. XRD profiles of the supported samples revealed the predominant abundance of a typical fluorite crystalline structure. TPR thermograms of supported samples were displaced towards lower temperatures with increasing Mn concentration, in contrast with the bulk samples. The supported Ce-Mn samples exhibited a greater performance in n-hexane elimination than did the corresponding simple oxides. The sample Ce0.33Mn0.67O2 obtained by method 2 presented the best activity, probably due to the enrichment of Ce4+, Mn3+ and Mn4+ surface species, an excess of superficial oxygen species and an easy reducibility as well as the lowest apparent activation energy.",

author = "Quispe, {Jesus Rojas} and R{\'o}mulo Cruz and Kou, {Rosario Sun} and Gino Picasso-Escobar",

year = "2020",

month = apr,

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pages = "391--398",

journal = "Quimica Nova",

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T1 - CeαMn1-αO2 CATALYSTS SUPPORTED over g-Al2O3 PREPARED by MODIFIED REDOX-COPRECIPITATION METHODS for n-HEXANE COMBUSTION

AU - Quispe, Jesus Rojas

AU - Cruz, Rómulo

AU - Kou, Rosario Sun

AU - Picasso-Escobar, Gino

PY - 2020/4/1

Y1 - 2020/4/1

N2 - A series of CeαMn1-αO2 catalysts supported on g-alumina with various molar concentrations of Ce (α, from 0 to 0.90) was synthesized by coprecipitation, applying two different precipitating agents, namely, sodium hydroxide (method 1) and sodium carbonate (method 2), with the use of sodium permanganate as a redox agent for precipitation. XRD profiles of the supported samples revealed the predominant abundance of a typical fluorite crystalline structure. TPR thermograms of supported samples were displaced towards lower temperatures with increasing Mn concentration, in contrast with the bulk samples. The supported Ce-Mn samples exhibited a greater performance in n-hexane elimination than did the corresponding simple oxides. The sample Ce0.33Mn0.67O2 obtained by method 2 presented the best activity, probably due to the enrichment of Ce4+, Mn3+ and Mn4+ surface species, an excess of superficial oxygen species and an easy reducibility as well as the lowest apparent activation energy.

AB - A series of CeαMn1-αO2 catalysts supported on g-alumina with various molar concentrations of Ce (α, from 0 to 0.90) was synthesized by coprecipitation, applying two different precipitating agents, namely, sodium hydroxide (method 1) and sodium carbonate (method 2), with the use of sodium permanganate as a redox agent for precipitation. XRD profiles of the supported samples revealed the predominant abundance of a typical fluorite crystalline structure. TPR thermograms of supported samples were displaced towards lower temperatures with increasing Mn concentration, in contrast with the bulk samples. The supported Ce-Mn samples exhibited a greater performance in n-hexane elimination than did the corresponding simple oxides. The sample Ce0.33Mn0.67O2 obtained by method 2 presented the best activity, probably due to the enrichment of Ce4+, Mn3+ and Mn4+ surface species, an excess of superficial oxygen species and an easy reducibility as well as the lowest apparent activation energy.

M3 - Artículo

SN - 0100-4042

VL - 43

SP - 391

EP - 398

JO - Quimica Nova

JF - Quimica Nova

ER -