Preparation of activated carbon from biomass residue with conventional steam activation was conducted to find the alternative raw materials for meeting the high demand for low-cost porous material in the desiccant application. In this study, activated carbons were produced from dead camphor leaves using two-step methods at different preparation temperatures. The characterization results revealed that the prepared activated carbons have a surface area of 700 m²/g, with 75% of microporosity. The water vapor sorption study reported that the water uptake of camphor leaf-based activated carbons was strongly affected by the pore properties of the materials. Moreover, from the water adsorption kinetics, it was observed that the rate constant of adsorption was varied at each relative pressure, which can be assumed that the water adsorption mechanism is different at each relative pressure. From these results, it was revealed that the prepared camphor leaf-based activated carbons have a promising ability to adsorb water vapor from humid air.

进行了用常规蒸汽活化法从生物质残渣制备活性炭的方法，以找到满足干燥剂应用中对低成本多孔材料的高需求的替代原料。在这项研究中，在不同的制备温度下，采用两步法从枯萎的樟脑叶中产生了活性炭。表征结果表明，所制备的活性炭的表面积为700 m ²/ g，微孔率为75％。水蒸气吸附研究报告说，樟脑叶基活性炭的吸水率受到材料孔隙特性的强烈影响。此外，从水的吸附动力学观察到，吸附的速率常数在每个相对压力下都变化，可以认为在每个相对压力下水的吸附机理是不同的。从这些结果表明，制备的樟脑叶基活性炭具有从湿空气中吸收水蒸气的有前途的能力。