ดีคาร์บอกซิเลชันของกรดไขมันด้วยตัวเร่งปฏิกิริยาโลหะของเหลวไอออนิก
The decline of petroleum resources and concerns about environmental issues caused by excessive energy consumption have motivated the search for alternative energy sources. A potential solution for this problem is biomass, which can be found in plant and animal remains. Fatty acids are a component of...
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| 格式: | Theses and Dissertations |
| 語言: | Thai |
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จุฬาลงกรณ์มหาวิทยาลัย
2022
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| 在線閱讀: | https://digiverse.chula.ac.th/Info/item/dc:85021 |
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| 總結: | The decline of petroleum resources and concerns about environmental issues caused by excessive energy consumption have motivated the search for alternative energy sources. A potential solution for this problem is biomass, which can be found in plant and animal remains. Fatty acids are a component of biomass that is an attractive choice of renewable energy sources because they can be converted to long-chain hydrocarbons via the decarboxylation reaction. However, the decarboxylation of fatty acid to alkanes is energy-intensive and suffers efficiency and selectivity issues. In this research, we aimed to develop new catalysts that can improve the fatty acid decarboxylation efficiency by using the combination of palladium/ionic liquid (Pd/IL) as catalysts. The palladium-catalyzed thermal decarboxylation of stearic acid (SA) to n-heptadecane in the absence or presence of ionic liquid was used as a model reaction at the ratio of SA:Pd:IL = 100:1:100 w/w. In the presence of only the Pd catalysts in various forms, the decarboxylation proceeded poorly at 300 °C. The results from Gas Chromatography-Flame Ionization Detector (GC-FID) analysis demonstrated that the use of Pd(OAc)2 catalyst alone gave only 68.3% conversion of stearic acid with 2.3% selectivity for heptadecane. In the presence of [BMIM]PF6, the conversion substantially increased to 92.7% with 89.5% selectivity under optimized conditions. The combination of other Pd catalysts with [BMIM]PF6 or Pd(OAc)2 with other ionic liquids gave poor results, although in all cases the conversion and selectivity were still better than using the Pd catalyst alone. No H2 atmosphere nor solvents were necessary. Consequently, the Pd-ionic liquid combination is a promising new catalyst system for the decarboxylation of fatty acids with high efficiency. |
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