微藻生物柴油的制备及其性能指标评价分析

doi:10.3969/j.issn.1673-5854.2021.05.008

Abstract

Abstract:

Microalgae biodiesel was prepared by SRCA process using microalgae crude oil as raw material. The results showed that the density, kinematic viscosity, flash point, sulfur content, sulfate ash, moisture content, mechanical impurities, copper corrosion, cetane number, acid value, free glycerol content and total glycerin of microalgae biodiesel met the requirements of GB/T 20828-2007. There was also a certain gap between the requirements of national standard for blending biodiesel BD100 and the prepared microalgae biodiesel. For example, the carbon residue of 10% bottom(4.03%), oxidation stability(0.85 h, 110℃) and 90% recovery temperature were far from the requirements of national standard, and the cold filter point(34℃) also did not meet the actual use requirements. The cold filter point of the product could be reduced by crystallization filtration or distillation fraction; 90% recovery temperature up to the standard could be obtained by cutting the fraction (the fraction below 180℃); the oxidation stability could be up to the standard (9.5 h) by adding 2 000 μg/g antioxidant, which could meet the requirement of national standard.

Key words: microalgae biodiesel, cold filter point, 90% recovery temperature, oxidation stability

CLC Number:

TQ35
TK63

Guojun YANG, Jianli ZENG. Preparation and Performance Evaluation of Microalgae Biodiesel[J]. Biomass Chemical Engineering, 2021, 55(5): 47-52.

Figures/Tables 5

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Table 1

Table 2

Fig.2

Table 3

References 20

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脂肪酸种类 types of fatty acids	质量分数/% mass fraction
C₁₂: 0	0.2728
C₁₄: 0	5.6227
C₁₆: 0	66.7557
C₁₆: 1	0.3662
C₁₈: 0	2.0592
C₁₈: 1	5.5568
C₁₈: 2	8.4518
C₁₈: 3	1.1716
C₂₀: 0	0.1333
C₂₀: 1	0.0920
C₂₂: 0	0.0474
C₂₂: 1	0.7039
C₂₂: 5	2.0435
C₂₂: 6	6.7232

分析项目 analysis item	分析方法 analytical method	BD100质量指标 (GB/T 20828—2007) quality index	实测值 measured value
密度density(20 ℃)/(kg·m^-3)	GB/T 2540—1981	820~900	885
运动黏度kinematic viscosity(40 ℃)/(mm²·s^-1)	GB/T 265—1988	1.9~6.0	4.615
闪点(闭口)flash point(closure)/℃	GB/T 261—2008	≥130	148.4
冷滤点cold filter point/℃	SH/T 0248—2006	报告tell	34
含硫量(质量分数)sulphur content (mass fraction)/%	SH/T 0689—2000	≤0.05(S500)或0.005(S50)	0.00042
10%蒸余物残炭(质量分数)/% the carbon residue of 10% bottom(mass fraction)	GB/T17144—1997	≤0.3	4.03
硫酸盐灰分(质量分数)sulphateash(mass fraction)/%	GB/T 2433—2001	≤0.02	0.004
含水量(质量分数)water content (mass fraction)/%	SH/T 0246—1992	≤0.05	0.02
机械杂质mechanical impurity	GB/T 511—2010	无no	—
铜片腐蚀(50 ℃，3 h)/级copper strip corrosion (50 ℃, 3 h)/grade	GB/T 5096—1985	≤1	1a
十六烷值cetane number	GB/T 386—2010	≥49	54.8
氧化安定性oxidation stability(110 ℃)/h	EN 14112—2003	≥6.0	0.85
酸值acid value/(mg·g^-1)	GB/T 264—1983	≤0.80	0.67
游离甘油质量分数free glycerol mass fraction/%	ASTM D6584—2010	≤0.020	0.0167
总甘油质量分数total glycerol mass fraction/%	ASTM D6584—2010	≤0.24	0.16
90%回收温度90% recovery temperature/℃	GB/T 6536—2010	≤360	331.5¹⁾

馏出比例/% distillate ratio	馏出温度distillation temperature/℃
馏出比例/% distillate ratio	S上the upper fluid	S下the under solid	S180	S220
10	329	329	323	328
20	330	330	329	330
30	331	331	331	331
40	332	332	331	332
50	333	333	332	333
60	349	351	333	333
70	352	388	333	348
80	389	393	334	352
90	393	398	352	389
95	400	491	392	394

Preparation and Performance Evaluation of Microalgae Biodiesel

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