Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content
Ni based catalysts supported over γ-Al2O3, previously modified with increasing contents of Mg(II), were employed for the steam reforming of glycerol. The aim of the present study is to analyze the effect of the content of Mg(II), as a promoter of Ni/γ-Al 2O3 catalysts, on the textural and structural...
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paper:paper_09205861_v213_n_p50_Dieuzeide2023-06-08T15:50:13Z Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content Jobbagy, Matias Amadeo, Norma Elvira Glycerol Ni/γ-Al2O3 Mg(II) Steam reforming Activity results Carbon deposition Carbon gasification Catalytic performance Catalytic properties Steam reforming of glycerols Structural characteristics Textural characteristic Aluminum Carbon Carbon dioxide Catalyst activity Catalyst selectivity Glycerol Nickel Steam reforming Catalyst supports Ni based catalysts supported over γ-Al2O3, previously modified with increasing contents of Mg(II), were employed for the steam reforming of glycerol. The aim of the present study is to analyze the effect of the content of Mg(II), as a promoter of Ni/γ-Al 2O3 catalysts, on the textural and structural characteristics of the solid; as well as on the catalytic activity and selectivity to H2 in the steam reforming of glycerol. Fresh samples were characterized by PXRD, BET surface area, H2 chemisorption, TPR, and CO2-TPD. Used catalysts were analyzed by TPO, in order to study the effect of Mg(II) on carbon gasification. Both fresh and used samples were examined by SEM. The content of Mg(II) has both an effect on the catalytic performance and on the structural and textural characteristics of the catalysts. The incorporation of Mg(II) results in the formation of Mg1-xAl 2O4-x spinel phase. The differences in catalytic properties due to the increasing content of Mg(II) have effect simultaneously on the Ni crystallite size, on the acidic-basic character and on the interactions between NiO and support. For the catalysts promoted with Mg(II), the best activity for the steam reforming of glycerol was achieved with Ni(10)Mg(3)Al catalyst while the Ni(10)Mg(15)Al catalyst formed the lowest amount of carbon during reaction time on stream. The catalyst prepared without Mg(II) presented good activity results despite the lowest Ni dispersion. This behaviour was assigned to the presence of Ni sites more active for the steam reforming of glycerol than the ones on the catalyst promoted with Mg(II). However, this catalyst had the highest carbon deposition during reaction time on stream. High contents of Mg(II) inhibited carbon formation, this was evidenced by TPO analyses performed to used samples. Low carbon formation at high Mg(II) could be related to the higher basic character of the support as the content of Mg(II) increases. © 2013 Elsevier B.V. All rights reserved. Fil:Jobbagy, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Amadeo, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v213_n_p50_Dieuzeide http://hdl.handle.net/20.500.12110/paper_09205861_v213_n_p50_Dieuzeide |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Glycerol Ni/γ-Al2O3 Mg(II) Steam reforming Activity results Carbon deposition Carbon gasification Catalytic performance Catalytic properties Steam reforming of glycerols Structural characteristics Textural characteristic Aluminum Carbon Carbon dioxide Catalyst activity Catalyst selectivity Glycerol Nickel Steam reforming Catalyst supports |
| spellingShingle |
Glycerol Ni/γ-Al2O3 Mg(II) Steam reforming Activity results Carbon deposition Carbon gasification Catalytic performance Catalytic properties Steam reforming of glycerols Structural characteristics Textural characteristic Aluminum Carbon Carbon dioxide Catalyst activity Catalyst selectivity Glycerol Nickel Steam reforming Catalyst supports Jobbagy, Matias Amadeo, Norma Elvira Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content |
| topic_facet |
Glycerol Ni/γ-Al2O3 Mg(II) Steam reforming Activity results Carbon deposition Carbon gasification Catalytic performance Catalytic properties Steam reforming of glycerols Structural characteristics Textural characteristic Aluminum Carbon Carbon dioxide Catalyst activity Catalyst selectivity Glycerol Nickel Steam reforming Catalyst supports |
| description |
Ni based catalysts supported over γ-Al2O3, previously modified with increasing contents of Mg(II), were employed for the steam reforming of glycerol. The aim of the present study is to analyze the effect of the content of Mg(II), as a promoter of Ni/γ-Al 2O3 catalysts, on the textural and structural characteristics of the solid; as well as on the catalytic activity and selectivity to H2 in the steam reforming of glycerol. Fresh samples were characterized by PXRD, BET surface area, H2 chemisorption, TPR, and CO2-TPD. Used catalysts were analyzed by TPO, in order to study the effect of Mg(II) on carbon gasification. Both fresh and used samples were examined by SEM. The content of Mg(II) has both an effect on the catalytic performance and on the structural and textural characteristics of the catalysts. The incorporation of Mg(II) results in the formation of Mg1-xAl 2O4-x spinel phase. The differences in catalytic properties due to the increasing content of Mg(II) have effect simultaneously on the Ni crystallite size, on the acidic-basic character and on the interactions between NiO and support. For the catalysts promoted with Mg(II), the best activity for the steam reforming of glycerol was achieved with Ni(10)Mg(3)Al catalyst while the Ni(10)Mg(15)Al catalyst formed the lowest amount of carbon during reaction time on stream. The catalyst prepared without Mg(II) presented good activity results despite the lowest Ni dispersion. This behaviour was assigned to the presence of Ni sites more active for the steam reforming of glycerol than the ones on the catalyst promoted with Mg(II). However, this catalyst had the highest carbon deposition during reaction time on stream. High contents of Mg(II) inhibited carbon formation, this was evidenced by TPO analyses performed to used samples. Low carbon formation at high Mg(II) could be related to the higher basic character of the support as the content of Mg(II) increases. © 2013 Elsevier B.V. All rights reserved. |
| author |
Jobbagy, Matias Amadeo, Norma Elvira |
| author_facet |
Jobbagy, Matias Amadeo, Norma Elvira |
| author_sort |
Jobbagy, Matias |
| title |
Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content |
| title_short |
Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content |
| title_full |
Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content |
| title_fullStr |
Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content |
| title_full_unstemmed |
Glycerol steam reforming over Ni/γ-Al2O3 catalysts, modified with Mg(II). Effect of Mg (II) content |
| title_sort |
glycerol steam reforming over ni/γ-al2o3 catalysts, modified with mg(ii). effect of mg (ii) content |
| publishDate |
2013 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09205861_v213_n_p50_Dieuzeide http://hdl.handle.net/20.500.12110/paper_09205861_v213_n_p50_Dieuzeide |
| work_keys_str_mv |
AT jobbagymatias glycerolsteamreformingovernigal2o3catalystsmodifiedwithmgiieffectofmgiicontent AT amadeonormaelvira glycerolsteamreformingovernigal2o3catalystsmodifiedwithmgiieffectofmgiicontent |
| _version_ |
1768545470666244096 |