Strategies for fuel property enhancement for second-generation multi-feedstock biodiesel

Goh, Brandon Han Hoe and Chong, Cheng Tung and Ong, Hwai Chyuan and Milano, Jassinnee and Shamsuddin, Abd Halim and Lee, Xin Jiat and Ng, Jo-Han (2022) Strategies for fuel property enhancement for second-generation multi-feedstock biodiesel. Fuel, 315. ISSN 0016-2361, DOI

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Fatty acids from non-edible bioresources are highly sought after as biofuel feedstock and the use of multi-stream feedstock for biodiesel production is of interest. This study explores the potential of using blended feedstock consisting of inedible jatropha oil (JO) and waste cooking oil (WO) for biodiesel production. Prior to blending, the unfavourable high acid value of jatropha oil was esterified under the most optimal conditions of 60 degrees C, 1% H2SO4 catalyst and alcohol to oil molar ratio of 11:1 to maximise the esterified yield (81.1 %). Based on the acid value measurement, the optimum volumetric blend of WO/EJO was determined to be 90/10 with the lowest acid value of 1.9 mg KOH g(-1) which was then utilised as feedstock for base-catalysed transesterification. The KOH catalysed transesterification was optimised at 60 degrees C, 1 wt% KOH catalyst and alcohol to oil molar ratio of 6:1 to produce biodiesel with low acid value (0.2 mg KOH g(-1)), high calorific value (38.4 MJ kg(-1)), high oxidation stability (similar to 11 h) and favourable viscosity (4.7 mm(2) s(-1)). The results show that the produced biodiesel has acceptable physicochemical properties but its properties can further be improved by blending with petroleum diesel and antioxidant. Among those produced blend derivatives, petroleum diesel and biodiesel blend (80:20) or B20 showed the best improvement with high calorific value (46.6 MJ/kg), high oxidation stability (similar to 37 h) and low acid value (0.3 mg KOH g(-1)). Based on the study, in situ feedstock blending of WO/EJO can improve the physicochemical properties of the produced biodiesel and reduce the dependency on single feedstock. Biodiesel blending with commercial diesel can enhance the biodiesel fuel properties and such derivatives can be directly applied in an existing engine.

Item Type: Article
Funders: Shanghai Jiao Tong University[WF220428004], Shanghai Jiao Tong University[BE2800001], University of Malaya under SATU joint research scheme[ST005-2017], Center of Reliability Engineering, Ming Chi University of Technology
Uncontrolled Keywords: Biofuel;Alternative energy;Waste management;Antioxidants; Biodiesel blending;Environmental sustainability
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TL Motor vehicles. Aeronautics. Astronautics
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 18 Aug 2022 01:28
Last Modified: 18 Aug 2022 01:28

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