Optimization of Bio-Oil Production from Hydrothermal Liquefaction of Cyanophyta

doi:10.7652/xjtuxb201503010

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Optimization of Bio-Oil Production from Hydrothermal Liquefaction of Cyanophyta

更新时间：2025-07-09

- Optimization of Bio-Oil Production from Hydrothermal Liquefaction of Cyanophyta
- Vol. 49, Issue 3, Pages: 56-61(2015)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201503010
  CLC： TK6
- Online First：10 March 2015，
  
  Published：2015
- 稿件说明：
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Optimization of Bio-Oil Production from Hydrothermal Liquefaction of Cyanophyta[J]. 2015, 49(3): 56-61.
DOI：

Optimization of Bio-Oil Production from Hydrothermal Liquefaction of Cyanophyta[J]. 2015, 49(3): 56-61. DOI： 10.7652/xjtuxb201503010.

摘要

为优化蓝藻水热液化制取生物油过程

探索反应条件间的交互影响作用及其反应机理

通过设计三因素三水平响应面分析实验

对反应温度(250～370 ℃)、反应时间(20～50 min)、物料质量分数(5%～20%)及其交互作用对蓝藻水热液化反应产油率的影响进行了研究

并通过分析水相产物中的总有机碳、氨氮含量和生物油中的有机物结构研究了生物油产物中化合物分布转化规律。实验结果表明:产油率随着温度的升高而提高

水相产物中总有机碳回收率显著降低

氮回收率提高; 反应时间、物料质量分数升高时氮回收率显著升高

而对总有机碳回收率的影响并不显著。通过对油相产物的傅里叶红外分析发现

生物油含有烷烃和酯类

以及酮、羧酸、烯烃、醇类化合物等。通过二次多项回归模型进行方差分析和回归拟合

得到了蓝藻水热液化制油反应的优化条件为反应温度369.99 ℃、反应时间40.33 min、物料质量分数5%

在此条件下

预测所得的最大产油率为33.73%。

Abstract

To optimize the HTL process of Cyanophyta

and study the influence of interactions of reaction conditions as well as the reaction mechanism

this paper conducts a research on the effects of reaction temperature(250-370 ℃)

reaction time(20-50 min)

solid concentrations(5%-20%)and their interactions on the bio-oil yield using hydrothermal liquefaction of Cyanophyta through designing a response surface experiment with three factors and three levels. In addition

the distribution and conversion of compounds in bio-oil were analyzed by determining the total organic carbon(TOC)

the ammonia content in water soluble product and the organic structures in bio-oil. The result showed that

with the temperature rising

the bio-oil yield and nitrogen recovery are both increased

however the TOC recovery in water soluble product is decreased significantly; the increase of reaction time and solid concentrations had positive influence on nitrogen recovery

but little effect on TOC recovery. The results of FT-IR analysis of bio-oil sample demonstrated that bio-oil contains alkanes

esters

ketones

carboxylic acid

olefine and alcohols

etc. Based on the analysis of variance and regression fitting of quadratic polynomial regression models

the optimum reaction conditions of hydrothermal liquefaction of Cyanophyta can be obtained:reaction temperature 369.99 ℃

reaction time 40.33 min

solids concentrations 5%. In this condition

the highest predicted bio-oil yield of 33.73% can be reached.

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Keywords

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