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林产化学与工业 ›› 2016, Vol. 36 ›› Issue (3): 60-66.doi: 10.3969/j.issn.0253-2417.2016.03.009

• 研究报告 • 上一篇    下一篇

轻馏分生物油催化酯化脱水提质研究

鲁俊祥, 郭姝君, 常杰, 付严   

  1. 华南理工大学化学与化工学院传热强化与过程节能教育部重点实验室, 广东 广州 510640
  • 收稿日期:2015-09-18 出版日期:2016-06-25 发布日期:2016-07-07
  • 通讯作者: 付严,副研究员,主要从事生物质制备燃料及高价值化学品研究工作;E-mail:fuyan@scut.edu.cn。 E-mail:fuyan@scut.edu.cn
  • 作者简介:鲁俊祥(1991-),男,江西抚州人,硕士生,主要研究方向为生物质能源化工
  • 基金资助:
    国家重点基础研究发展计划(2013CB228104);国家自然科学基金资助项目(21476090);中央高校基本科研业务费专项资金资助(无编号)

Upgrading of Light Fraction in Bio-oil by Catalytic Esterification and Water Removal

LU Jun-xiang, GUO Shu-jun, CHANG Jie, FU Yan   

  1. Key Laboratory of Heat Transfer Enhancement and Energy Conservation of Education Ministry, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China
  • Received:2015-09-18 Online:2016-06-25 Published:2016-07-07

摘要: 为了得到稳定的含氧液体燃料及较好分离糖类及其衍生物,以Amberlyst-36离子交换树脂为催化剂在100℃下对粗生物油进行酯化脱水提质工艺优化,考察了反应时间、催化剂用量以及正丁醇和生物油质量比(醇油比)对提质的影响,得到最佳提质条件为醇油比1.5:1.0、15%的催化剂用量、反应时间4 h,此条件下提质油酸值从72.23 mg/g降为3.98 mg/g,水分从53.06%降为3.34%,热值由8.75 MJ/kg升高至31.50 MJ/kg。GC-MS分析显示生物油中不稳定酸、醛、酮转化为稳定含氧化合物,稳定目标产物酯、醇、醚GC含量占74.70%。接着进行老化实验,保存3个月,粗生物油黏度从3.21 mm2/s增加到48.24 mm2/s,极不稳定,提质油理化性质显著提高并保持稳定。最后将20.00 g提质油、30.00 g蒸馏水和30.00 g二氯甲烷进行充分混合,萃取分液,可以基本将糖类及其衍生物从提质油中分离出来,得到粗糖质量为1.24 g,糖类物质总GC含量为87.92%,其中丁基-β-D-吡喃葡萄糖苷占到75.28%。

关键词: 生物油, 酯化脱水, 提质, 含氧化合物, 糖类

Abstract: Stable oxygenated liquid fuel and sugars derivatives were obtained by esterification and water removal of crude bio-oil over Amberlyst-36 ion-exchange resin. The effects of reaction time, catalyst dosage and alcohol-oil ratio were investigated. The results showed that the optimum upgrading conditions were alcohol-oil ratio 1.5:1.0, 15% catalyst dosage and 4 h. Under these operation factors, the acid number of upgraded bio-oil reduced from 72.23 mg/g to 3.98 mg/g, water content decreased from 53.06% to 3.34%, heating value increased from 8.75 MJ/kg to 31.50 MJ/kg. The GC-MS analysis showed that the labile acids, aldehydes and ketones of crude bio-oil could transform to stable oxygenated compounds, and the GC content of stable compounds (esters, alcohols and ethers) reached up to 74.70%. Crude bio-oil and upgrading bio-oil were kept for 3 months to compare the changes of characteristics. The results showed that crude bio-oil was extremely unstable and viscosity increased from 3.21 mm2/s to 48.24 mm2/s. In contrast, upgrading bio-oil was relatively stable and the physicochemical properties were improved significantly. Moreover, 20.00 g upgrading bio-oil, 30.00 g distilled water and 30.00 g dichloromethane were mixed adequately for separation of sugar derivatives. It was found that sugar derivatives could almost completely separate from upgrading bio-oil. The mass of crude sugars was 1.24 g and the total GC content of sugar derivatives was 87.92%, in which β-D-glucopyranoside, butyl accounted for 75.28%.

Key words: bio-oil, esterification and water removal, upgrading, oxygenated compounds, sugars

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