Quillope John Christian C, Carpio Rowena B, Gatdula Kristel M, Detras Monet Concepcion M, Doliente Stephen S
Department of Chemical Engineering, University of the Philippines Los Baños, College, Laguna, 4031, Philippines.
Department of Chemical Engineering, University of Bath, Claverton Down, Bath, BA2 7AY, UK.
Heliyon. 2021 Nov 17;7(11):e08417. doi: 10.1016/j.heliyon.2021.e08417. eCollection 2021 Nov.
Microwave pyrolysis offers rapid and low-cost technology to upgrade agro-forestry residues to high-value products. I-optimal experimental design was used to determine the optimal combination of microwave power and exposure time to maximize biochar yield from corn cob. A validation experiment at optimal conditions of 600 W and 6.9 min produced an average yield of 56.98% on a dry and ash-free basis, agrees with the predicted value (3.43% error) and confirms the adequacy of the model yield equation. Characterization of biochar product revealed an organized mesoporous structure with a carbon content of 62.68%, surface area of 3.05 m/g, pore volume of 0.003 cm/g, capacitance range of 27.14-53.99 μF/g, energy density range of 6.0 × 10 - 1.2 × 10 Wh/kg, and power density range of 9.4 × 10 - 2.49 × 10 W/kg. The biochar produced would require further process to be considered for various industrial applications.
微波热解提供了一种快速且低成本的技术，可将农林业残余物升级转化为高价值产品。采用I-最优实验设计来确定微波功率和辐照时间的最佳组合，以实现玉米芯生物炭产量的最大化。在600 W和6.9分钟的最佳条件下进行的验证实验，以干基和无灰基计平均产量为56.98%，与预测值相符（误差为3.43%），并证实了模型产量方程的适用性。生物炭产品的表征显示出有序的中孔结构，碳含量为62.68%，比表面积为3.05 m²/g，孔容为0.003 cm³/g，电容范围为27.14 - 53.99 μF/g，能量密度范围为6.0×10⁻³ - 1.2×10⁻² Wh/kg，功率密度范围为9.4×10⁻³ - 2.49×10⁻² W/kg。所制备的生物炭在考虑用于各种工业应用之前还需要进一步处理。
