微拟球藻油脂萃取及脱脂藻水热液化

唐晓寒; 杨晓奕

doi:10.11949/0438-1157.20190491

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微拟球藻油脂萃取及脱脂藻水热液化

能源和环境工程 | 更新时间：2020-06-24

- 微拟球藻油脂萃取及脱脂藻水热液化
- Lipids extraction of Nannochloropsis and hydrothermal liquefaction of defatted Nannochloropsis
- 化工学报 2019年70卷第11期页码：4356-4362
- 作者机构：
  
  北京航空航天大学能源与动力工程学院，北京100191
- 作者简介：
  
  唐晓寒（1990—），男，博士研究生，txh_buaa@163.com
  杨晓奕（1968—），女，博士，教授，yangxiaoyi@buaa.edu.cn
- 基金信息：
  
  国家重点研发计划项目(2018YFB1501505)
- DOI：10.11949/0438-1157.20190491
  中图分类号： TK 6
- 收稿：2019-05-09，
  
  修回：2019-08-02，
  
  纸质出版：2019-11-05
- 稿件说明：
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唐晓寒, 杨晓奕. 微拟球藻油脂萃取及脱脂藻水热液化[J]. 化工学报, 2019, 70(11): 4356-4362

TANG Xiaohan, YANG Xiaoyi. Lipids extraction of Nannochloropsis and hydrothermal liquefaction of defatted Nannochloropsis[J]. CIESC Journal, 2019, 70(11): 4356-4362
唐晓寒, 杨晓奕. 微拟球藻油脂萃取及脱脂藻水热液化[J]. 化工学报, 2019, 70(11): 4356-4362 DOI： 10.11949/0438-1157.20190491.

TANG Xiaohan, YANG Xiaoyi. Lipids extraction of Nannochloropsis and hydrothermal liquefaction of defatted Nannochloropsis[J]. CIESC Journal, 2019, 70(11): 4356-4362 DOI： 10.11949/0438-1157.20190491.

摘要

为提高微藻的综合利用效率，使用不同的溶剂系统分别对干、湿微拟球藻进行油脂萃取，并对脱脂后的藻渣进行水热液化实验，探究溶剂萃取脱脂对微藻水热液化产物的影响。溶剂萃取的结果表明，极性溶剂对油脂的萃取率达到25.0%，但对脂质的萃取缺乏选择，萃取物的脂肪酸甲酯产率仅为29.68%；混合溶剂萃取的脂肪酸甲酯回收率达到57.70%。脱脂后的微拟球藻水热粗油产率为27.7%~34.6%，氮含量为5.29%~6.68%，主要由脂肪酸、脂肪酸酯、脂肪酸酰胺、长链烃类、胺类、含氧化合物和含氮杂环化合物组成。经甲醇萃取后的湿藻水热粗油产率为34.6%，氮含量为5.44%，过程能耗低，表明甲醇萃取湿藻结合水热液化具有一定的应用前景。

Abstract

To improve the comprehensive utilization efficiency of microalgae

dry or wet

Nannochloropsis

were extracted with different solvent and hydrothermal liquefaction (HTL) experiments of defatted

Nannochloropsis

were carried out to explore the effects of defatted methods on HTL products. The solvent extraction results showed that polar solvent can extract 25.0% of lipids from microalgae without selectivity

which resulted in only 29.68% for the fatty acid methyl ester yield of the extracts; the fatty acid methyl ester recovery of mix solvent was 57.70%. For the HTL bio-crude of defatted

Nannochloropsis

the yield was 27.7%—34.6%

nitrogen content was 5.29%—6.68%

mainly consisted of fatty acid

fatty acid esters

fatty acid amides

long-chain hydrocarbon

amines

oxygen-containing compounds and nitrogen-containing heterocyclic compounds. The yield of wet algae hydrothermal crude oil after methanol extraction was 34.6%

the nitrogen content was 5.44%

and the process energy consumption was low

indicating that methanol extraction wet algae combined with hydrothermal liquefaction has certain application prospects.

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