engleski

On-line monitoring of biodiesel production by near-infrared spectroscopy

Since the ever-demanding need for biodiesel production is growing, rapid monitoring for biodiesel yield and its quality is becoming more popular. NIR method, is complementary with the gas chromatography (GC) method and could give good insight for identifying biodiesel yield in different experimental set-ups. In this work, the NIR method was used for easier and faster determination of biodiesel yield and the amount of glycerol in crude biodiesel. Samples were collected on-line and at-line depending on NIR sensor used (fiber-optic probe or flow cell). Biodiesel production was monitored in both, batch and continuous (micro)reactors, respectively. Obtained results showed that NIR method is suitable for on-line monitoring of biodiesel yield and glycerol amount (total and free). Results were compared with analytical tools, GC and spectrophotometer that are commonly used for off-line quantification of biodiesel and glycerol concentrations. NIR method has proven to be a promising, fast and reliable method for on-line measurement of biodiesel and glycerol concentrations.

on-line measurement, biodiesel concentration, glycerol concentration, near-infrared spectroscopy

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