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Conversion of cellulose to levulinic acid and lactic acid in hot compressed water |
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| รหัสดีโอไอ | |
| Title | Conversion of cellulose to levulinic acid and lactic acid in hot compressed water |
| Creator | Panya Wattanapaphawong |
| Contributor | Prasert Reubroycharoen, Arimoto Yamaguchi |
| Publisher | Chulalongkorn University |
| Publication Year | 2559 |
| Keyword | Cellulose, Lactic acid, เซลลูโลส, กรดแล็กติก |
| Abstract | In this research, I studied cellulose conversion into levulinic acid and lactic acid. Cellulose in biomass is considered as a renewable carbon source because of decreasing of fossil fuel in the world. I studied the effect of hot compressed water with carbon dioxide process on cellulose conversion into levulinic acid and I also studied the effect of metal oxides as a catalyst on cellulose conversion into lactic acid. Moreover, the optimum condition, amount of catalyst, the type of catalyst, and reusability of catalyst were investigated. The results are divided as three parts. First part, I reported that the use of hot compressed water with carbon dioxide could be directly converted cellulose to levulinic acid and that the yield of levulinic acid slightly differed when carbon dioxide is added into reaction. Thus, I concluded that the use of hot compressed water with carbon dioxide was not enough for cellulose conversion into levulinic acid. Second part, I studied the effect of metal oxides on cellulose conversion into lactic acid. The result showed that ZrO2 gave the high yield of lactic acid. I obtained 21.2% yield of lactic acid by using ZrO2 as a catalyst. The optimum condition for cellulose conversion was reaction temperature 473 K, reaction time 6 h. Many ZrO2 was characterized to understand correlation between the yield of lactic acid and properties of catalyst. I found that the amount of acid site and base site of catalyst played an important role for cellulose conversion into lactic acid. The result of reusability of catalyst showed that the yield of lactic acid slightly decreased after the first reaction. Third part, I studied the effect of mixed metal oxides on cellulose conversion into lactic acid. Various mixed metal oxide were used in reaction. The results showed that 10%ZrO2-Al2O3 gave the 25.3 % yield of lactic acid. |
| URL Website | cuir.car.chula.ac.th |
