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首页> 外文期刊>RSC Advances >Preparation of nitrogen-doped microporous modified biochar by high temperature CO2-NH3 treatment for CO2 adsorption: effects of temperature
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Preparation of nitrogen-doped microporous modified biochar by high temperature CO2-NH3 treatment for CO2 adsorption: effects of temperature

机译：高温CO2-NH3处理用氮掺杂微孔改性生物炭的制备CO2吸附：温度的影响

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摘要

Nitrogen-rich agricultural waste, soybean straw, was used as a raw material to prepare high efficiency CO2 adsorbents (nitrogen-doped porous modified biochars). Three different modification methods for the preparation of these adsorbents were compared, i.e. activation with carbon dioxide, ammonification with ammonia (NH3) and high temperature treatment with the mixture of CO2 and NH3. Effects of modification temperature on physicochemical properties of the modified biochars and influences of adsorption temperature on their CO2 capture performances were both investigated. Activation with CO2 obviously developed the pore structure of modified biochars, especially micropores, while the ammonification with NH3 and modification with the mixture not only developed porosity, but also introduced nitrogen functional groups, and the modification with the mixture was better than the ammonification with NH3. As the modification temperature increased, the micropore surface area and N/C ratio of the modified biochars by the modification with the mixture both increased first, and reached the maximum at 800 degrees C, and then decreased. Furthermore, at the lower adsorption temperature, the micropore structure played an important role to influence the CO2 capture performance, while at the higher adsorption temperature, the chemical properties, especially the nitrogen functional groups, contributed more to the CO2 capture.
机译：富含氮的农业废弃物豆秸秆，用作制备高效二氧化碳吸附剂的原料（氮掺杂多孔改性Biochars）。比较三种不同的改性方法，用于制备这些吸附剂，即用二氧化碳活化，用CO 2和NH 3的混合物用二氧化碳，用氨（NH 3）和高温处理。改性温度对改性生物和吸附温度对其CO 2捕获性能的影响的影响。用CO2活化明显开发了改性生物脉冲，尤其是微孔的孔结构，而NH3的氨化和与混合物的改性不仅开发孔隙率，而且引入氮官能团，并与混合物的改性优于NH3的氨化。 。随着改性温度的增加，通过用混合物的改性，通过混合物的微孔表面积和N / C的N / C比，并且均在800℃下达到最大值，然后降低。此外，在吸附温度较低，微孔结构起到影响CO 2捕获性能的重要作用，而在吸附温度较高，化学性质，尤其是氮官能团，贡献更多到CO 2捕获。

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  • 来源
    《RSC Advances》 |2016年第100期|共10页
  • 作者

    Zhang Xiong; Wu Jing; Yang Haiping; Shao Jingai; Wang Xianhua; Chen Yingquan; Zhang Shihong; Chen Hanping;

  • 作者单位

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

    Huazhong Univ Sci &

    Technol Sch Energy &

    Power Engn State Key Lab Coal Combust 1037 Luoyu Rd Wuhan 430074 Hubei Province Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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