Performance Study on Diluted Sulfuric Acid Hydrolysis of Natural Products

• Main Author: 陳永彬
• Other Authors: 吳海萍
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/38143907557600380247

碩士 === 明新科技大學 === 化學工程與材料科技系 === 98 === In this study, 0.5%, 1.0% and 1.5% aqueous solutions of diluted sulfuric acid were used to hydrolyze Bidens pilosa L. var. Minor Sherff, Polygonum chinese L., Zebrina pendula Schnizl and Miscanthus floridulus. Three temperatures of 140 ℃, 160 ℃ and 180 ℃ and four lengths of time (10,20,30 and 40 minutes) are used for hydrolyses. The hydrolyzed products, glucose as well as xylose were analyzed and quantizied by HPLC. Bidens pilosa L. var. Minor Sherff ‘s hydrolysis results in the highest glucose yield of 27.437 mg/g using 1.5 % sulfuric acid, temperature 140 ℃ and 10 minutes, while the maximum xylose yield is 48.880 mg/g , by using 1.5 % sulfuric acid, temperature 160 ℃ and 20 minutes. Polygonum chinese L.’s hydrolysis results in the highest glucose yield of 7.114 mg/g using 1.5 % sulfuric acid, temperature 160 ℃ and 40 minutes, while the maximum xylose yield is 26.884 mg/m, by using 1.5 % sulfuric acid, temperature 160 ℃ and 40 minutes.Zebrina pendula Schnizl’s hydrolysis results in the highest glucose yield of 55.165 mg/g using 1.5 % sulfuric acid, temperature 180 ℃ and 30 minutes, while the maximum xylose yield is 26.371 mg/g, by using 1.5 % sulfuric acid, temperature 180 ℃ and 30 minutes. Miscanthus floridulus’ hydrolysis results in the highest glucose yield of 70.563 mg/g using 1.0 % sulfuric acid, temperature 180 ℃ and 10 minutes, while the maximum xylose yield is 155.164 mg/g, by using 1.5 % sulfuric acid, temperature 180 ℃ and 30 minutes. Overall concluding, Miscanthus floridulus generates the highest yield of glucose and xylose by diluted sulfuric acid hydrosis with feasible temperature and time.