Effect of Die Geometry and Moisture Content on Pelletizing of Palm Pruning Residues

Palm pruning residues are potential pellet raw material, which quite abundant in regions with hot climates. In pelletizing process, material properties and machine features the main factors affecting final quality. this study, 5 mm sieve hole diameter milled palm was pelleted using two different dies moisture. First die (D1) has 25 total length, 17° inlet angle 10 depth. The second (D2) 35 33° outlet of both 11 8 mm, respectively. Pelleting moisture is fixed at levels as 10% (M10) 14% (M14). change production parameters physical were investigated according to type content parameters. Increasing had a positive effect on capacity it obtained 82.44, 103.1, 134.05, 145.49 kg h-1 for D1-M10, D1-M14, D2-M10 D2-M14 pellets, increase caused degradation forms, more evident pellets produced D1 die. Pellets D2 compressed denser lower content. length resulted heavier production, resulting higher low specific energy consumption. Pellet durability index (%, ar) measured 95.53; 92.29 97.74; 98.32, It concluded that longer active can tolerate high pelletizing, durable be wide range. addition, conical dimensions needs optimized materials.