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首页> 外文期刊>ACS Omega >Biomass-Based Activated Carbon and Activators: Preparation of Activated Carbon from Corncob by Chemical Activation with Biomass Pyrolysis Liquids
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Biomass-Based Activated Carbon and Activators: Preparation of Activated Carbon from Corncob by Chemical Activation with Biomass Pyrolysis Liquids

机译：基于生物质的活性炭和活化剂：通过用生物质热解液体的化学活化制备来自玉米浦的活性炭

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Pyrolysis liquids are the main products in biomass pyrolysis, and the strong acidity limits its utilization. Likewise, activators are required in the process of preparing biomass-based activated carbon, and current activators are usually chemical agents and not sustainable. Both issues are addressed with the new concept of using acidic pyrolysis liquids as the activator of biomass-based activated carbon. In the present research, corncob-based activated carbon was prepared with phosphoric acid and pyrolysis liquids (bio-oil and wood vinegar) as activators. The effects of activation temperature and the types of activators on the structure and surface chemical properties of activated carbon were investigated. Results show that the adsorption performance and specific surface area of activated carbon prepared with bio-oil are not as good as that prepared with phosphoric acid and wood vinegar, but its yield is relatively high. Some alkali and earth alkaline metals remain on the activated carbon prepared by bio-oil and wood vinegar. At 450 °C, the surface area and pore volume of activated carbon prepared with bio-oil and wood vinegar were much smaller than the ones prepared with phosphoric acid. Increasing the activation temperature may improve the performance of activated carbon. The specific surface area of activated carbon prepared with wood vinegar as the activator can reach 384.35 m~(2)/g at an activation temperature of 850 °C, which is slightly inferior to that prepared with phosphoric acid as the activator. However, the adsorption amount of methylene blue exceeds the activated carbon prepared with phosphoric acid. This shows that wood vinegar can be used as an activator to prepare biomass-based activated carbon to achieve sustainability of the entire preparation process of biomass-based activated carbon.
机译：热解液是生物质热解中的主要产物，强酸度限制了其利用率。同样，在制备基于生物质的活性炭的过程中需要活化剂，并且目前的活化剂通常是化学试剂而不是可持续的。在使用酸性热解液作为基于生物质基活性炭的活化剂的新概念中，解决了这两个问题。在本研究中，用磷酸和热解液（生物油和木醋）作为活化剂制备基于玉米菌的活性炭。研究了活化温度和活化剂类型对活性炭结构和表面化学性质的影响。结果表明，用生物油制备的活性炭的吸附性能和比表面积不如用磷酸和木材醋制备的那么好，但其产率相对较高。一些碱和地球碱金属保留在生物油和木材醋制备的活性炭上。在450℃下，用生物油和木材醋制备的活性炭的表面积和孔体积远小于用磷酸制备的碳酸。增加活化温度可以改善活性炭的性能。用木醋制备的活性炭的比表面积在850℃的活化温度下可达到384.35m〜（2）/ g，这略不如用磷酸作为活化剂制备的。然而，亚甲基蓝的吸附量超过用磷酸制备的活性炭。这表明木醋可用作制备基于生物质基活性炭的活化剂以实现生物质基活性炭的整个制备过程的可持续性。

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