| Autor: |
Klinthongchai, Yoottapong, Prichanont, Seeroong, Praserthdam, Piyasan, Jongsomjit, Bunjerd |
| Předmět: |
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| Zdroj: |
Journal of Environmental Chemical Engineering; Jun2020, Vol. 8 Issue 3, pN.PAG-N.PAG, 1p |
| Abstrakt: |
• MCF-C exhibits 80.3 % of acetaldehyde selectivity in ethanol dehydrogenation. • Surfactant residue in MCF-Si is beneficial to transform to MCF-C by sulfuric acid. • Mesoporous structure with interconnected pore remarkably provides better diffusion. • MCF-C is very effective as an inexpensive and environmentally friendly catalyst. This research focused on synthesis of mesocellular foam carbon (MCF-C) and this catalyst was employed dehydrogenation of ethanol to acetaldehyde. The mesocellular foam silica (MCF-Si) was used as the template of material following by converting the surfactant residue (Pluronic P123) into carbon layers using H 2 SO 4 and NaOH etching. The obtained MCF-C exhibited the highest surface area of 995 m2/g among these materials, and mesoporous size of 4.2 nm with spherical shape and interconnected pore. Furthermore, total acidity of MCF-C also increased from 427.07 (MCF-Si) to 682.64 μmole. In the part of catalytic test, the MCF-C was used in gas-phase ethanol dehydrogenation at 200–400 °C. It revealed that the MCF-C exhibited the highest ethanol conversion (ca. 17.5 %) at 400 °C due to its high acidity without significant deactivation of catalyst within 12 h. Besides, its high ethanol conversion, it is worth noting that the acetaldehyde selectivity (ca. 80.3 %) was also high, especially at 400 °C. This can be attributed to the proper mesoporous size that can facilitate the diffusion of acetaldehyde without further decomposing at high temperature. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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