A route to produce renewable diesel from algae: Synthesis and characterization of biodiesel via in situ transesterification of Chlorella alga and its catalytic deoxygenation to renewable diesel

被引:67
作者
Viegas, Carolina Vieira [1 ]
Hachemi, Imane [2 ]
Freitas, Suely Pereira [1 ]
Maki-Arvela, Paivi [2 ]
Aho, Atte [2 ]
Hemming, Jarl [2 ]
Smeds, Annika [2 ]
Heinmaa, Ivo [3 ]
Fontes, Filipe Batista [1 ]
da Silva Pereira, Debora Cristina [1 ]
Kumar, Narendra [2 ]
Gomes Aranda, Donato Alexandre [1 ]
Murzin, Dmitry Yu. [2 ]
机构
[1] Univ Fed Rio de Janeiro, BR-21941 Rio De Janeiro, Brazil
[2] Abo Akad Univ, Turku, Finland
[3] NICPB, Tallinn, Estonia
关键词
Algae; Biodiesel; Transesterification; Deoxygenation; Fuel quality; FRESH-WATER MICROALGAE; MOLECULAR CHARACTERIZATION; ORGANIC-SOLVENT; BIOMASS; EXTRACTION; CONVERSION; ACID; FUEL; OIL; DECARBOXYLATION;
D O I
10.1016/j.fuel.2015.03.064
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
In situ transesterification of Chlorella alga was performed using 5-20 wt% sulfuric acid as a catalyst at either 60 or 100 degrees C. The maximum ester yield in the range of 96-98% is comparative to the specification of ester content in biodiesel, 96%. A high excess of methanol was used in transesterification ensured also a high ester yield. The FAME was purified via adsorption of chlorophyll and carotenoids onto a clay. Properties of the purified biodiesel were investigated with several methods. The results showed that the Chlorella based biodiesel exhibits slightly lower oxidative and thermal stability compared to soybean based biodiesel due to the presence of polyunsaturated FAMEs. In addition to biodiesel, also the residual biomass was characterized showing that it contained sugars and proteins. An additional hydrogenation would increase the oxidative stability. Hydrodeoxygenation of Chlorella based biodiesel was also demonstrated over 5 wt% Ni-HY-80 zeolite with SiO2/Al2O3 ratio of 80 and with 5 wt% Pd/C at 300 degrees C and 30 bar in dodecane as a solvent. Ni-HY-80 was superior to Pd/C catalyst giving more than 95% yield of hydrocarbons. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码:144 / 154
页数:11
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