Biodiesel production from waste salmon oil: kinetic modeling, properties of methyl esters, and economic feasibility of a low capacity plant

Abstract

Salmon oil directly obtained from salmon silage in a tricanter centrifuge was subjected to homogeneous acid‐catalyzed esterification. Alcohol‐to‐oil molar ratio, catalyst amount, and reaction temperature were varied in order to obtain the kinetic parameters that fit the data satisfactory. A reaction mechanism with four consecutive reactions was considered and the attack of the nucleophile alcohol to the protonated carbonyl substrate was corroborated to be the rate‐determining step, in accordance with previous studies in free fatty acids esterification. A kinetic model with 8 independent parameters described with high accuracy the experimental data of 27 reactions with a regression coefficient of 90.94%. Pre‐esterified oil was submitted to transesterification and properties of resulting methyl esters were measured. Acidity, peroxide value, viscosity and flash point were acceptable to use as diesel‐grade fuel. However, cold flow properties and especially oxidative stability can limit its use as automotive fuel. Finally, a techno‐economic analysis was performed and the influence of salmon oil price on the viability of a low capacity fuel production plant was analyzed. Copyright © 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

Biodiesel production using immobilized lipase: feasibility and challenges

“…Serrano et al . developed a kinetic model explaining homogenous acid catalyzed esterification using salmon oil . This shows the potential of non‐edible plant oil and animal‐derived products as an effective feedstock for better biodiesel yield.…”

Optimization of the esterification reaction of free fatty acids present in waste salmon oil

“…More details on the materials employed and the methodology used have been published elsewhere. 32 The experimental data used in this work have been published elsewhere; 32 however, a reproduction of the table of data is presented here. Table 1 (reproduced with permission) shows the different experiments conducted, their operational conditions for the selected variables, and the final free fatty acid conversion.…”

“…Serrano et al 32 studied the pre-esterification of waste salmon oil, with 8% free fatty acid content, using sulfuric acid and in the presence of ethanol to produce biodiesel and water. The results were promising, with a reduction of 95% in the initial amount of fatty acids, allowing the product to be used for conventional base homogeneous transesterification, as in this work.…”

“…21,35,36 Optimization An optimization was done for all 21 experiments presented elsewhere. 32 The optimization was done using a quadratic model which allowed the study of all the variables involved. This analysis has led to the following equation: (1)…”

Comprehensive Review on Biodiesel Production from Palm Oil Mill Effluent

“…The influence of a market variable would not be similar among two or more technological alternates available due to the amount and quality of the market variables, i.e., input materials and products could not necessarily be identical for different technologies available. A lot of research has been done to study the effect of variables on the sustainability of biodiesel using various technologies with varying market scenarios with respective capacities of production [157,158]. Mulugetta et al [159] stated that the influencing market variables, which can significantly influence the profitability of biodiesel synthesis, include the selling rate of biodiesel, purchasing cost of feedstock, and oil extraction cost.…”