蒸汽爆破废纸稀酸水解的研究  

Study on Dilute Acid Hydrolysis of Steam Explosion Waste Paper

作　　者：李奇明[1] 戚军军 韩颖[1,2] 周景辉[1] 

机构地区：[1]大连工业大学轻工与化学工程学院,辽宁大连116034 [2]齐鲁工业大学制浆造纸科学与技术教育部重点实验室,山东济南250353

出　　处：《中国造纸》2017年第3期7-12,共6页China Pulp & Paper

基　　金：辽宁省自然科学基金(2015020576);齐鲁工业大学制浆造纸科学与技术教育部重点实验室开放基金(218005)

摘　　要：研究了蒸汽爆破(处理)对废纸(旧杂志纸)稀酸水解糖化的影响,首先探讨了未蒸汽爆破的废纸在液固比为100∶1的条件下,不同温度、H2SO4质量分数、水解时间对废纸水解糖化的影响。结果表明,废纸的最佳水解条件为水解温度190℃,H2SO4质量分数4%,水解时间50 min,在该条件下水解得到还原糖浓度为2.88 mg/m L,还原糖得率为52.3%。在此条件下对蒸汽爆破后的废纸进行水解,研究得到最佳蒸汽爆破条件为爆破压力2.2 MPa,压力作用时间10 min,废纸含水量8%。蒸汽爆破后的废纸水解还原糖浓度为4.21 mg/m L,还原糖得率为64.7%,较未蒸汽爆破的废纸提高了12.4%,由此表明蒸汽爆破对促进废纸的水解糖化有明显作用。In this paper, the effect of steam explosion on the preparation of reducing sugar by dilute acid hydrolysis of waste paper was stud- ied. Firstly, the effects of temperature, H2 SO4 concentration and hydrolysis time on the hydrolysis of untreated waste paper under the condi- tions of liquid/solid ratio of 100：1 was investigated. The results showed that the optimized sulphuric acid hydrolysis conditions were as fol- lows： concentration of sulfuric acid 4% wt, reaction temperature 190℃, reaction time 50 min, the yield of reducing sugar 52. 3%. The steam exploded waste paper hydrolysis under optimized hydrolysis conditions, study found that the best condition of steam explosions were ： pressure 2.2 MPa, Pressure holding time 10 min, water content of waste paper 8%. The reducing sugar yield in hydrolysis of the steam explosion waste paper was 64. 7%, compared with untreated waste paper increased by 12.4%, which suggesting that steam explosion has obvious effect to promote the hydrolysis of waste paper. Finally, the FI-RT, SET and XRD analyses of explosion waste paper were conducted to explained the reason of improved efficiency of hydrolysis of waste paper.

关 键 词：废纸 稀酸水解 爆破 纤维素 

分 类 号：TS724[轻工技术与工程—制浆造纸工程]