Quality Improvement of Liquid Smoke of Coconut Shell by Tar Scrubber

: One of the most challenging issues concerning to the pyrolysis of liquid smoke coconut shell is the presence of tar. The acidity, water content, density and content analysis of liquid smoke using coconut shell which produced at 500 o C using pyrolysis reactor equipped with a tar scrubber were compared to liquid smoke produced conventionally. Characterization of acidity of the liquid was measured by pH meter by adhering to ASTM E70, water content by using volumetric Karl Fischer titration method following ASTM E203 and ASTM D1744 method, the density by AOC 1995, and dichloromethane extracts content by gas chromatography-mass spectrometry (GC-MS). The results showed that the pH range of liquid smoke was pH 2.4 to 2.6 with the water content of 89.970 to 94.593%, and the density of 1.0118 to 1.0036 g/mL. The carbonyl and phenol content were 5.05 to 6.473% and 85.057 to 90.024% respectively. From the results can be concluded that the quality of liquid smoke produced by tar scrubber is better than the quality of liquid produced by conventional method.