섬유소계 바이오매스로부터 황산 촉매를 이용한 레블린산 생산
Sulfuric Acid Catalytic Conversion to Levulinic Acid from Cellulosic Biomass
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Levulinic acid (LA) derived from cellulosic biomass, serves a crucial intermediate that can be used in various chemicalconversions. This study focused on optimizing the production of LA using two types of pretreated rice husk (de-ashed and delignificatedcellulosic biomass) in a batch reaction system through catalytic conversion with sulfuric acid. To determine the optimal conditions,the conversions of glucose and α-cellulose were examined to compare the effects of pretreatment on the rice husk. The experimentalparameters covered a broad spectrum, including temperatures ranging from 140°C to 200°C, a reaction time was up to 600 minutes,and a substrate to catalyst (acid solution) ratio of 100 g/L. The highest LA yield was 44.8%, achieved from de-ashed rice husk with 3.0wt.% of sulfuric acid at 180°C and with a reaction time of 180 minutes. In the case of the delignificated rice husk, a LA yield of 43.6%was obtained with 3.0 wt.% of sulfuric acid at 200°C and with reaction time of 30 minutes.
Abstract
Levulinic acid (LA) derived from cellulosic biomass, serves a crucial intermediate that can be used in various chemicalconversions. This study focused on optimizing the production of LA using two types of pretreated rice husk (de-ashed and delignificatedcellulosic biomass) in a batch reaction system through catalytic conversion with sulfuric acid. To determine the optimal conditions,the conversions of glucose and α-cellulose were examined to compare the effects of pretreatment on the rice husk. The experimentalparameters covered a broad spectrum, including temperatures ranging from 140°C to 200°C, a reaction time was up to 600 minutes,and a substrate to catalyst (acid solution) ratio of 100 g/L. The highest LA yield was 44.8%, achieved from de-ashed rice husk with 3.0wt.% of sulfuric acid at 180°C and with a reaction time of 180 minutes. In the case of the delignificated rice husk, a LA yield of 43.6%was obtained with 3.0 wt.% of sulfuric acid at 200°C and with reaction time of 30 minutes.
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