Physical, mechanical, and energy characteristics of the briquettes produced with cashew nutshell waste under different process conditions are reported in the present study. The cashew nutshell briquettes are produced with a lower compression force of ≤ 7.75 kN. The main objective of the study is to examine the effects of binder (starch), binder water addition, and drying duration on the different characteristics of the cashew nutshell briquettes. The influence of these parameters on the various properties was examined with the help of ANOVA and regression analysis. From the experimental results and mathematical models, it is evident that the most influencing parameter was found to be starch content and drying duration. Binder water content addition did not significantly affect the quality of the briquettes. The optimal values achieved for the analyzed briquetting process parameters are starch content of 12.917%, water content of 50%, and a drying duration of 7 days. According to the mathematical model achieved, these optimal parameters gave a maximum compressive strength of 1249.17 kPa, optimal density of 1047.681 kg/m³, shatter resistance of 99.9%, durability of 99.547%, water-resistance of 97.342%, the calorific value of 18.681 MJ/kg, and moisture content of 11.789%. Furthermore, it was found in the study, the volumetric energy density of the biomass increased from 9.497 to 19.57 GJ/m³. The results of the tests and optimization study indicate that cashew nutshell briquettes have good mechanical and energy properties that make them eligible for use in different thermal applications.

本研究报告了在不同工艺条件下用腰果壳废料生产的煤球的物理、机械和能量特性。腰果壳煤球的生产压缩力较低，≤ 7.75 kN。该研究的主要目的是检查粘合剂（淀粉）、粘合剂加水和干燥时间对腰果壳煤球不同特性的影响。在方差分析和回归分析的帮助下检查了这些参数对各种特性的影响。从实验结果和数学模型可以看出，影响最大的参数是淀粉含量和干燥时间。粘合剂水含量的添加没有显着影响煤球的质量。分析的压块工艺参数达到的最佳值是淀粉含量为 12.917%，水含量为 50%，干燥时间为 7 天。根据所获得的数学模型，这些最佳参数给出的最大抗压强度为 1249.17 kPa，最佳密度为 1047.681 kg/m³、抗碎性99.9%，耐久性99.547%，耐水性97.342%，发热量18.681 MJ/kg，水分11.789%。此外，研究发现，生物质的体积能量密度从9.497增加到19.57 GJ/m ³。测试和优化研究的结果表明，腰果壳煤球具有良好的机械和能量特性，使其适合用于不同的热应用。