With faster growth rates and higher photosynthetic efficiencies than other terrestrial plants, microalgae biomass could be considered as a green, low-cost, alternative carbon source. This paper explores the potential use of various species of microalgae as activated carbon precursors. Chlorella and Spirulina were evaluated both as freeze-dried microalgae and in fresh paste form, while Acutodesmus Obliquus and Coelastrella sp. were studied only as paste.

Activated carbons were produced using the selected species of microalgae as well as mixtures of pine sawdust and microalgae. Two different preparation routes were compared: with and without hydrothermal carbonization pretreatment before physical activation with CO₂ in a single step. All samples were conformed into pellets prior to CO₂ activation.

The CO₂ adsorption capacity of the microalgae derived carbons was assessed in conditions representative of a flue gas (10.5 vol.% CO₂ at atmospheric pressure and 50 °C). Significant differences in terms of CO₂ adsorption capacity, carbon yield and pellet density were obtained among the species studied. These preliminary results showed that activated carbons produced from microalgae mixed with pine sawdust and directly activated with CO₂ are among the most promising adsorbents to capture CO₂ from flue gas.

与其他陆生植物相比，具有更快的生长速度和更高的光合效率，微藻生物质可被视为一种绿色，低成本的替代碳源。本文探讨了各种微藻作为活性炭前体的潜在用途。Ç hlorella和螺旋藻既作为冷冻干燥的微藻类和在新鲜的糊剂形式进行了评价，而Acutodesmus对斜和Coelastrella属。仅以糊状进行研究。

活性炭是使用选定的微藻种类以及松木屑和微藻的混合物生产的。比较了两种不同的制备途径：在单步中用CO ₂物理活化之前和不进行水热碳化预处理的情况。在CO ₂活化之前，将所有样品均制成丸粒。

在代表烟道气的条件下（在大气压和50°C下为10.5 vol。％CO ₂）评估微藻衍生的碳的CO ₂吸附能力。在所研究的物种之间，获得了CO ₂吸附能力，碳收率和颗粒密度方面的显着差异。这些初步结果表明，由微藻与松木屑混合并直接由CO ₂活化产生的活性炭是从烟气中捕获CO ₂的最有希望的吸附剂之一。