Borhan Azry, Yusuf Suzana
HICoE, Centre for Biofuel and Biochemical Research, Institute of Self-Sustainable Building, Department of Chemical Engineering, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia.
Materials (Basel). 2020 Nov 4;13(21):4970. doi: 10.3390/ma13214970.
Carbon dioxide (CO) has been deemed a significant contributor to the climate crisis and has an impact on environmental systems. Adsorption is widely used among other technologies for carbon capture because of its many benefits. As a starting material for the production of activated carbon (AC) by chemical activation using malic acid due to its biodegradable and non-toxic properties, rubber seed shell (RSS) was used as agricultural waste from rubber farming. Sample A6, which was carbonized for 120 min at a temperature of 600 °C and impregnated at a ratio of 1:2, was identified to achieve the highest surface area of 938.61 m/g with micropore diameter of 1.368 nm, respectively. Using the fixed volumetric approach measured at 25, 50, and 100 °C, the maximum CO adsorption capability reported is 59.73 cm/g of adsorbent. Using the pseudo-first order of Lagergren, the pseudo-second order and the Elovich model, experimental data is modeled. It appears that, based on the correlation coefficient, the pseudo-first order model is aligned with the experimental findings. Furthermore, the activation energy of under 40 kJ/mol indicated a physical adsorption occurs, indicating that the RSS chemically activated with malic acid is a fascinating source of CO removal requirements.
二氧化碳（CO₂）被认为是气候危机的重要促成因素，对环境系统有影响。吸附因其诸多优点而在碳捕获的其他技术中被广泛使用。橡胶籽壳（RSS）作为橡胶种植产生的农业废弃物，由于其可生物降解和无毒的特性，被用作通过苹果酸化学活化生产活性炭（AC）的起始原料。样品A6在600℃的温度下碳化120分钟并以1:2的比例浸渍，其比表面积最高可达938.61 m²/g，微孔直径分别为1.368纳米。使用在25℃、50℃和100℃下测量的固定体积法，报道的最大CO₂吸附能力为59.73 cm³/g吸附剂。使用Lagergren的拟一级动力学、拟二级动力学和Elovich模型对实验数据进行建模。基于相关系数，拟一级动力学模型似乎与实验结果相符。此外，低于40 kJ/mol的活化能表明发生了物理吸附，这表明用苹果酸化学活化的RSS是满足CO₂去除要求的理想材料。
