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Study on Dilute Acid Hydrolysis of Steam Explosion Waste Paper
  
DOI：10.11980/j.issn.0254-508X.2017.03.002
Key Words:Waste paper  hydrolysis  explosion  cellulose
Fund Project: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)。
Author NameAffiliation
李奇明1 1.大连工业大学轻工与化学工程学院,辽宁大连，116034 
戚军军1 1.大连工业大学轻工与化学工程学院,辽宁大连，116034 
韩　颖1,2，* 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 
周景辉1 1.大连工业大学轻工与化学工程学院,辽宁大连，116034 
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Abstract:In this paper, the effect of steam explosion on the preparation of reducing sugar by dilute acid hydrolysis of waste paper was studied. Firstly, the effects of temperature, H2SO4 concentration and hydrolysis time on the hydrolysis of untreated waste paper under the conditions of liquid/solid ratio of 100∶1 was investigated. The results showed that the optimized sulphuric acid hydrolysis conditions were as follows: 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.
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