The emission of sulphur dioxide (SO₂) gas from power plants and factories to the atmosphere has been an environmental challenge globally. Thus, there is a great interest to control the SO2 gas emission economically and effectively. This study aims to use and convert abundantly available oil palm fiber (OPF) biomass into an adsorbent to adsorb SO₂ gas. The preparation of OPF biochar and activated biochar was optimised using the Response Surface Methodology (RSM) based on selected parameters (i.e., pyrolysis temperature, heating rate, holding time, activation temperature, activation time and CO₂ flowrate). The best adsorbent was found to be the OPF activated biochar (OPFAB) compared to OPF biochar. OPFAB prepared at 753 °C for 73 min of activation time with 497 ml/min of CO₂ flow yields the best adsorption capacity (33.09 mg/g) of SO₂. Meanwhile, OPF pyrolysed at 450 °C of heating temperature, 12 °C/min of heating rate and 98 min of holding time yield adsorption capacity at 18.62 mg/g. Various characterisations were performed to investigate the properties and mechanism of the SO₂ adsorption process. Thermal regeneration shows the possibilities for the spent adsorbent to be recycled. The findings imply OPFAB as a promising adsorbent for SO₂ adsorption.

发电厂和工厂向大气排放二氧化硫 (SO ₂ ) 气体一直是全球面临的环境挑战。因此，经济有效地控制二氧化硫气体排放具有重要意义。本研究旨在利用大量可用的油棕纤维 (OPF) 生物质并将其转化为吸附剂以吸附 SO ₂气体。基于选定的参数（即热解温度、加热速率、保温时间、活化温度、活化时间和 CO ₂流量）。与 OPF 生物炭相比，最佳吸附剂是 OPF 活化的生物炭 (OPFAB)。OPFAB 在 753 °C 下制备，活化时间为 73 分钟，CO ₂流量为 497 毫升/分钟，SO _{2 的}吸附能力最佳（33.09 毫克/克）。同时，OPF在450°C的加热温度、12°C/min的加热速率和98min的保持时间下热解产生18.62mg/g的吸附容量。进行了各种表征以研究 SO ₂吸附过程的性质和机理。热再生显示了回收废吸附剂的可能性。这些发现表明OPFAB 是一种很有前途的SO ₂吸附剂。