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Low-Cost Preparation of High-Surface-Area Nitrogen-Containing Activated Carbons from Biomass-Based Chars by Ammonia Activation
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.iecr.9b06836
Songlin Zuo 1 , Wenbin Zhang 1 , Yongfang Wang 1 , Haian Xia 1
Affiliation  

Nitrogen-containing activated carbons are a new type of porous carbon materials with excellent performance in electricity storage, catalysis, and the selective adsorption, but the low-cost preparation remains a technical obstacle for practical application. In this work, ammonia activation is developed to prepare nitrogen-containing activated carbons from abundant and sustainable biomass-based chars by a one-step method. High-surface-area nitrogen-containing activated carbons are produced in yields higher than 20%, with a surface area and nitrogen content greater than 2300 m2/g and 5.0%, respectively. Moreover, the four successive stages in the process of ammonia activation are suggested in terms of the evolution of the pore structure with the char burnoff; the evolution of nitrogen-containing groups including pyridinic-nitrogen, pyrrolic-nitrogen, quaternary nitrogen, and −NH2 with the activation temperature are analyzed. These results indicate that ammonia activation is a new and highly efficient method for the one-step preparation of nitrogen-containing activated carbons from biomass-based chars.

中文翻译:

通过氨活化从生物质焦炭中低成本制备高表面积的含氮活性炭

含氮活性炭是一种新型的多孔碳材料,在蓄电,催化和选择性吸附方面具有优异的性能,但低成本制备仍然是实际应用的技术障碍。在这项工作中,开发了氨活化技术,可通过一步法从丰富且可持续的基于生物质的炭中制备含氮活性炭。高表面积含氮活性炭的产率高于20%,表面积和氮含量大于2300 m 2/ g和5.0%。此外,根据炭燃烧过程中孔结构的演变,提出了氨活化过程中的四个连续阶段。分析了活化温度下吡啶氮,吡咯氮,季氮和-NH 2等含氮基团的演化。这些结果表明,氨活化是一种从生物质焦炭一步制备含氮活性炭的新型高效方法。
更新日期:2020-04-24
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