Influence of support on physicochemical properties of ZrO2 based solid acid heterogeneous catalysts for biodiesel production
Hala R. Mahmoud; El_Molla, Sahar; Marwa M. Ibrahim;
Abstract
Environmental pollution control is the challenge area of heterogeneous catalysts to avoid the use of harmful
materials in chemical synthesis. So ZrO2-based solid acid catalysts were prepared and used in environmental
applications like production of biodiesel. ZrO2 loading on different supports (Al2O3, Fe2O3, TiO2 and SiO2)
prepared by a hybrid sol-gel auto combustion methods. The structural, surface and acidity properties are studied.
The catalytic activity was evaluated by production of biodiesel through conversion of stearic acid to ester. ZrO2/
SiO2 has the highest conversion rate because of a high surface area and a high number of Lewis acid sites. Under
the optimal reaction conditions of alcohol/ acid molar ratio 120:1, mass ratio of catalyst to acid 0.1, reaction
time 3 h and reaction temperature 120 °C, the conversion rate reached 48.6%. Moreover, the catalysts reused
over at least five runs without significant loss of activity.
materials in chemical synthesis. So ZrO2-based solid acid catalysts were prepared and used in environmental
applications like production of biodiesel. ZrO2 loading on different supports (Al2O3, Fe2O3, TiO2 and SiO2)
prepared by a hybrid sol-gel auto combustion methods. The structural, surface and acidity properties are studied.
The catalytic activity was evaluated by production of biodiesel through conversion of stearic acid to ester. ZrO2/
SiO2 has the highest conversion rate because of a high surface area and a high number of Lewis acid sites. Under
the optimal reaction conditions of alcohol/ acid molar ratio 120:1, mass ratio of catalyst to acid 0.1, reaction
time 3 h and reaction temperature 120 °C, the conversion rate reached 48.6%. Moreover, the catalysts reused
over at least five runs without significant loss of activity.
Other data
Title | Influence of support on physicochemical properties of ZrO2 based solid acid heterogeneous catalysts for biodiesel production | Authors | Hala R. Mahmoud ; El_Molla, Sahar ; Marwa M. Ibrahim | Keywords | Environmental catalysis;BET;Characterizations;Oxide supports;TPD | Issue Date | 8-Jan-2019 | Publisher | Elsevier B.V. | Journal | Catalysis Communications | Volume | 122 | Start page | 10 | End page | 15 | ISSN | 15667367 | DOI | https://doi.org/10.1016/j.catcom.2019.01.008 |
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