Effect of Moisture Content on Roselle Seed Oils Properties and its Biodiesel Properties for Renewable Fuel

Kittapas Homraruen, Winai Chanpeng


Roselle seeds were obtained after harvesting the roselle flower. These seeds contain an oil content of about 10-20% w/w that indicates the possibility for using as raw material for biodiesel production. In this study, the effect of moisture content on roselle seed (8%, 10%, 12%) obtained after frying combined with oven drying are studied on the properties of oil content, volatile matter, fix carbon, ash content, and fatty acid composition, The results showed that roselle seed contained 8 to 12% of moisture content have 1274-1323 ml per 0.0468 g of Oil contained, 69.83-73.01% of volatile matter, 16.07-17.82% of fixed carbon, 6.92-8.47% of ash content. The results on fatty acid composition found that roselle seed contained 8 to 12% of moisture content contained 20.81-22.46% of palmitic acid, 4.83-5.04% of stearic acid, 38.80-47.73% of oleic acid, 21.69-33.33% of linoleic acid and 2.16-2.71% of linoleic acid. After that, the combined oil from three different moisture content was further produced biodiesel and its properties were analyzed. The result showed that all properties in terms of pour point, acidity, viscosity, flash point, density met the properties of biodiesel standard that revealed roselle seed oil can make renewable fuel.


Biodiesel; Fuel properties; Moisture; Roselle seeds; Transesterification

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