Sustainable activated carbons (ACs) with high specific surface areas were successfully prepared from Termanalia arjuna (TA) biomass using H₃PO₄ as activating agent in a simple two-step activation-carbonization procedure. The effects of the synthesis parameters on their CO₂ capture ability were also examined. The ratio of biomass to activating agent mass was 1:3, and the carbonization at 800 °C for 4 h exhibited a great potential for CO₂ uptake. Maximum CO₂ uptake was achieved under ambient conditions. Recyclability up to five cycles with marginal change could be achieved. The high performance of CO₂ adsorption capacity is due to better microporosity and the presence of basic oxygen functional groups on the carbon surfaces.

中文翻译：

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Termanalia arjuna 废物生物质衍生多孔活性炭用于高效捕获二氧化碳

使用 H ₃ PO ₄作为活化剂，在简单的两步活化-碳化过程中，成功地制备了具有高比表面积的可持续活性炭 (AC) 。还检查了合成参数对其CO _{2捕获能力的影响。}生物质与活化剂质量之比为1:3，800 ℃碳化4 h表现出巨大的CO ₂吸收潜力。在环境条件下实现了最大的 CO _2吸收。可以实现多达五个循环的可回收性，并具有边际变化。_{CO 2}的高性能吸附能力是由于更好的微孔率和碳表面上碱性氧官能团的存在。