Abstract：
The high cost of commercial CO2 capture material is one of the issues hindering the widespread adaptation of the technology. This study explored efficient ways of utilizing waste material in the form of bagasse fly ash (BFA) as CO2 adsorbent through thermochemical preparations of physical activation, and hydrothermal carbonization (HTC). The activation of BFA using flue gas was able to produce an adsorbent with good CO2 adsorption capacity, with similar results to the CO2 activation. The second approach using co-HTC of BFA with chicken manure (CM) optimized using Box-Behnken design of experiment was able to produce an adsorbent with CO2 adsorption capacity nearly on-par with commercial adsorbents. It was also found that the model was able to accurately predict the experiment outcome when verified with the additional experiments. Material characterizations showed that the increase of the CO2 adsorption capacity of the adsorbent might have been achieved through the formation of secondary amines deposited on the BFA. The results of this study showed that the utilization of waste in the form of BFA and CM could contribute to the advancement of circular and low-cost CO2 capture medium from waste materials, which could increase the adaptation and involvement of sugar industry and poultry farm.
摘要：
商业CO2捕获材料的高成本是阻碍该技术的广泛适应的问题之一。本研究探索了通过物理活化的热化学制备，利用甘蔗渣粉煤灰（BFA）形式的废物作为CO2吸附剂的有效方法，和热液碳化（HTC）。使用烟气活化BFA能够产生具有良好CO2吸附能力的吸附剂，具有与CO2活化相似的结果。使用Box-Behnken实验设计优化的BFA与鸡粪（CM）的co-HTC的第二种方法能够生产出具有与商业吸附剂几乎相同的CO2吸附能力的吸附剂。还发现，当通过其他实验进行验证时，该模型能够准确预测实验结果。材料表征表明，吸附剂的CO2吸附能力的增加可能是通过形成沉积在BFA上的仲胺来实现的。这项研究的结果表明，以BFA和CM形式的废物利用可以有助于从废物材料中提高循环和低成本的CO2捕集介质，这可以增加制糖业和家禽养殖场的适应性和参与度。
