H2SO4/CaO-Catalyzed Process for Biodiesel Production from High Acid Value Jatropha curcas Crude Oil

2011 ◽  
Vol 44 (7) ◽  
pp. 529-533 ◽  
Author(s):  
Yooko Tsuchiya ◽  
Yuichi Kaneki ◽  
Yukiyasu Yamakoshi
Keyword(s):  
Crude Oil ◽  
Jatropha Curcas ◽  
Acid Value ◽  
Biodiesel Production ◽  
High Acid

Study on the solid acid catalysts in biodiesel production from high acid value oil

2013 ◽  
Vol 19 (4) ◽  
pp. 1413-1419 ◽  
Author(s):  
Rizwan Sheikh ◽  
Moo-Seok Choi ◽  
Jun-Seop Im ◽  
Yeung-Ho Park
Keyword(s):  
Solid Acid ◽  
Acid Value ◽  
Biodiesel Production ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
High Acid

Deacidification of Jatropha Curcas Oil by Extraction for Biodiesel Production

2013 ◽  
Vol 291-294 ◽  
pp. 207-211
Author(s):  
Xue Jun Liu ◽  
Hai Yan Zhang ◽  
Ning Ai ◽  
Mei Zhen Lu ◽  
Yu Min Li ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Jatropha Curcas ◽  
Acid Value ◽  
Biodiesel Production ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Ethanol Extraction ◽  
Jatropha Curcas Oil ◽  
Base Catalysts

The acid value of jatropha curcas oil is 9.41mgKOH/g. The most of fatty acids should be removed if base catalysts are adopted to catalyze the transesterification reaction for biodiesel production in case of soap formation. In this study, methanol and ethanol were adopted to extract the fatty acids in jatropha curcas oil. Then, it was catalyzed by calcium methoxide for biodiesel production. The extracted fatty acids can be used to produce biodiesel at supercritical or sulfuric acid conditions. The results indicated that the acid value of jatropha curcas oil decrease to 0.31 mgKOH/g from 9.41 mgKOH/g using ethanol extraction for 3 times at 25°C. The biodiesel yield exceeded 96% using solid base catalyst. The advantages of methanol and ethanol extractions are low oil loss and high biodiesel yield.

Biodiesel production direct from high acid value oil with a novel magnetic carbonaceous acid

2015 ◽  
Vol 155 ◽  
pp. 637-647 ◽  
Author(s):  
Fan Zhang ◽  
Zhen Fang ◽  
Yi-Tong Wang
Keyword(s):  
Acid Value ◽  
Biodiesel Production ◽  
High Acid

scholarly journals Production of Biodiesel from High Acid Value Waste Cooking Oil Using an Optimized Lipase Enzyme/Acid-Catalyzed Hybrid Process

2009 ◽  
Vol 6 (s1) ◽  
pp. S485-S495 ◽  
Author(s):  
N. Saifuddin ◽  
A. Z. Raziah ◽  
H. Nor Farah
Keyword(s):  
Acid Value ◽  
Reaction Rates ◽  
Waste Cooking Oil ◽  
Biodiesel Production ◽  
Hybrid Process ◽  
Initial Reaction ◽  
Cooking Oil ◽  
High Acid ◽  
Lipase Enzyme ◽  
Acid Catalyzed

The present study is aimed at developing an enzymatic/acid-catalyzed hybrid process for biodiesel production using waste cooking oil with high acid value (poor quality) as feedstock. Tuned enzyme was prepared using a rapid drying technique of microwave dehydration (time required around 15 minutes). Further enhancement was achieved by three phase partitioning (TPP) method. The results on the lipase enzyme which was subjected to pH tuning and TPP, indicated remarkable increase in the initial rate of transesterification by 3.8 times. Microwave irradiation was found to increase the initial reaction rates by further 1.6 times, hence giving a combined increase in activity of about 5.4 times. The optimized enzyme was used for hydrolysis and 88% of the oil taken initially was hydrolyzed by the lipase. The hydrolysate was further used in acid-catalyzed esterification for biodiesel production. By using a feedstock to methanol molar ratio of 1:15 and a sulphuric acid concentration of 2.5%, a biodiesel conversion of 88% was obtained at 50 °C for an hour reaction time. This hybrid process may open a way for biodiesel production using unrefined and used oil with high acid value as feedstock.

Biodiesel production from high acid value waste frying oil catalyzed by superacid heteropolyacid

2008 ◽  
Vol 101 (1) ◽  
pp. 93-100 ◽  
Author(s):  
Fenghua Cao ◽  
Yang Chen ◽  
Fengying Zhai ◽  
Jing Li ◽  
Jianghua Wang ◽  
...  
Keyword(s):  
Acid Value ◽  
Frying Oil ◽  
Biodiesel Production ◽  
Waste Frying Oil ◽  
High Acid

scholarly journals Enhancement of Biodiesel Production from High-Acid-Value Waste Cooking Oil via a Microwave Reactor Using a Homogeneous Alkaline Catalyst

Energies ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 437
Author(s):  
Ming-Chien Hsiao ◽  
Peir-Horng Liao ◽  
Nguyen Vu Lan ◽  
Shuhn-Shyurng Hou
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Microwave Power ◽  
Acid Value ◽  
Waste Cooking Oil ◽  
Transesterification Reaction ◽  
Biodiesel Production ◽  
Alkaline Catalyst ◽  
Cooking Oil ◽  
High Acid

In this study, low quality oils (waste cooking oils) with high acid value (4.81 mg KOH/g) were utilized as the feedstocks for a transesterification reaction enhanced by additional microwave power and the use of an NaOH catalyst. The kinetics of the transesterification reaction under different reaction times and temperatures was studied. It was found that in the microwave-assisted transesterification reaction, the optimum conditions under a microwave power of 600 W were as follows: an NaOH catalyst of 0.8 wt %, a 12:1 molar ratio of methanol to oil, a reaction time of 2 min, and a reaction temperature of 65 °C. The conversion of waste cooking oil into biodiesel reached 98.2% after this short reaction time. This result conformed to 96.5% of the standard value of Taiwan CNS 15072. In addition, with increases in the reaction temperature from 55 to 65 °C, the reaction rate constant increased from 0.635 to 2.396 min−1, and the activation energy required for the transesterification reaction was 123.14 kJ/mole.

Fe–Zn double-metal cyanide complexes catalyzed biodiesel production from high-acid-value oil

2011 ◽  
Vol 36 (7) ◽  
pp. 2026-2031 ◽  
Author(s):  
Fang Yan ◽  
Zhenhong Yuan ◽  
Pengmei Lu ◽  
Wen Luo ◽  
Lingmei Yang ◽  
...  
Keyword(s):  
Acid Value ◽  
Biodiesel Production ◽  
Metal Cyanide ◽  
High Acid ◽  
Cyanide Complexes
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