Oil point pressure of cashew (Anacardium occidentale) kernels
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Department of Agricultural Engineering, Obafemi Awolowo University, Ile-Ife, Nigeria
Int. Agrophys. 2008, 22(1): 53-59
The effects of moisture content (4, 6, and 8%), heating temperature (70, 85, 100, and 115oC) and heating time (15, 25, 35 and 45 min) on the oil point pressure of coarsely ground and finely ground cashew kernel aggregates were investigated using a laboratory press. For aggregates it was observed that oil point pressure decreased significantly with increase in moisture content, heating temperature and heating time. The lowest oil point pressure values obtained were 0.1572 MPa (for fine cashew kernel aggregates at a moisture content of 4% heated at 115°C for 45 min) and 0.1664 MPa (for coarse cashew kernel aggregates at a moisture content of 6 % heated at 100°C for 45 min). For both particle sizes at moisture content >8 % and heating temperature >100oC, the dead weight of the hydraulic press was sufficient to bring oil out of the oil bearing cells.
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