In this study, the fixed bed slow pyrolysis experiments have been conducted on a sample of walnut (Juglans regia) shell. The experiments were performed in a static Heinze retort to investigate, particularly, the influence of final pyrolysis temperature, heating rate and particle size range on the pyrolysis product yields. In addition, the pyrolysis oil was characterised at the condition of the maximum liquid product yield. In the fixed bed retort, the maximum oil yield of 20 percent was obtained at 500 deg C with particle size range of 0.224-1.24 mm and heating rate of 40 deg C min~(-1). The yield of pyrolysis conversion was 70.8 percent at this experimental conditions. The chemical characterisation has shown that the oil obtained from walnut shell can be used as a renewable fuel and chemical feedstock.
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