Effect of organic acids on subcritical hydrolysis of sweet sorghum bagasse

LÜ Huisheng; ZHANG Jia; LI Yonghui; GENG Zhongfeng; WANG Zhi; LÜ Chunliu; SHI Xingfang

doi:10.11949/j.issn.0438-1157.20180344

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Effect of organic acids on subcritical hydrolysis of sweet sorghum bagasse

更新时间：2025-12-10

- Effect of organic acids on subcritical hydrolysis of sweet sorghum bagasse
- CIESC Journal Issue 9, Pages: 4058-4065(2018)
- 作者机构：
  
  天津大学石油化工技术开发中心, 教育部绿色合成与转化重点实验室,天津,300072
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180344
  CLC： Q352.62
- Online First：05 September 2018，
  
  Published：05 September 2018
- 稿件说明：
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LÜ Huisheng, ZHANG Jia, LI Yonghui, et al. Effect of organic acids on subcritical hydrolysis of sweet sorghum bagasse[J]. CIESC Journal, 2018, (9): 4058-4065.
DOI：

LÜ Huisheng, ZHANG Jia, LI Yonghui, et al. Effect of organic acids on subcritical hydrolysis of sweet sorghum bagasse[J]. CIESC Journal, 2018, (9): 4058-4065. DOI： 10.11949/j.issn.0438-1157.20180344.

摘要

半纤维素的高效转化是提高甜高粱渣原料全组分利用的关键技术之一。采用亚临界水热预处理方法，并将强度因子R0引入研究过程，考察了不同温度（160~200℃）和反应时间（10~60 min）对甜高粱渣水解反应的影响。在这基础上，进一步考察了多种有机酸（乳酸、醋酸及乳酸+醋酸）对亚临界水解效果的影响。实验表明，当强度因子lgR0=3.96（180℃，40 min）时，采用不外加酸的亚临界水热预处理工艺得到的最大木糖浓度为4.79 g·L-1；有机酸的加入可强化水解反应，提高木糖浓度；与单一乳酸或醋酸处理方法相比，加入同浓度的乳酸+醋酸既可以促进半纤维素水解，又可以抑制副产物生成；在温度180℃，时间40 min，乳酸+醋酸（乳酸：醋酸=6：4）的浓度1%（质量）的条件下，木糖浓度为7.92 g·L-1。

Abstract

The efficient conversion of hemicellulose is a key step in improving the utilization of all components of sweet sorghum bagasse. Sweet sorghum bagasse was pretreated by subcritical hydrolysis. The effects of different reaction temperature (160-200℃) and reaction time (10-60 min) on the yield of xylose(C-5 sugar) and byproducts were investigated by subcritical hydrothermal pretreatment. The experimental conditions were described by intensity factor. The effects of various organic acids on the subcritical hydrolysis of hemicellulose

including acetic acid

lactic acid and acetic acid+lactic acid were further investigated. The results showed that the maximum xylose concentration was 4.79 g·L-1at the severity of 3.96(180℃

40 min)

during the subcritical hydrothermal pretreatment without added acid. The addition of organic acids could enhance the hydrolysis reaction and increase xylose concentration. Compared to the treatment with acetic acid or lactic acid alone

the combined use of acetic acid and lactic acid can effectively promote the degradation of hemicellulose and inhibit the formation of by-products. The maximum xylose concentration was 7.92 g·L-1

which was obtained at 180℃

for 40 min

and with the addition of 1%(mass) acetic acid+lactic acid(lactic acid:acetic acid=6:4).

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