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Promising zirconia-mixed Al-based nitrogen carriers for chemical looping of NH_3: Reduced NH_3 decomposition and improved NH_3 yield

机译：用于NH_3化学循环的有前景的氧化锆混合Al基氮载体：减少NH_3分解并提高NH_3产量

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摘要

The chemical looping ammonia generation (CLAG) of N-sorption/desorption reactions via Al-based N-carriers for producing ammonia (NH3) (a non-carbon fuel) is thought to be an important alternative to the conventional Haber-Bosh NH3 synthesis technology. However, the low yield of NH3, because of significant NH3 decomposition at the required N-desorption temperature, inhibits the development of CLAG. Accordingly, ZrO2 mixed AlN was designed in this study to investigate the NH3 generation characteristics of AlN during the N-desorption process in a stationary bed reactor. The results showed that ZrO2 can improve the formation of NH3 because the molecular adsorption of NH3 occurred on the ZrO2 surface, thus preventing NH3 from decomposing. The ZrO2 loadings and steam concentrations in the atmosphere positively affect the yield and generation efficiency of NH3, while increasing the reaction temperature increased the NH3 yield from 1.2 to 3.3 mmol, but reduced the NH3 generation efficiency from 91.7% to 60.3%.
机译：通过铝基N载体进行N吸附/解吸反应的化学循环氨生成（CLAG），用于生产氨（NH3）（一种非碳燃料），是常规Haber-Bosh NH3合成的重要替代方法技术。但是，由于在所需的N解吸温度下会大量分解NH3，因此NH3的收率低，抑制了CLAG的发展。因此，在本研究中设计了ZrO2混合AlN，以研究固定床反应器中N解吸过程中AlN的NH3生成特性。结果表明，ZrO2可以改善NH3的形成，因为NH3的分子吸附发生在ZrO2表面，从而防止了NH3的分解。大气中的ZrO2含量和蒸汽浓度积极影响NH3的产率和生成效率，而提高反应温度会使NH3的生成率从1.2升高到3.3 mmol，但将NH3的生成效率从91.7％降低到60.3％。

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  • 来源
    《Fuel》 |2020年第15期|116821.1-116821.8|共8页
  • 作者

    Wu Ye; Gao Yuan; Zhang Quan; Cai Tianyi; Chen Xiaoping; Liu Dong; Fan Maohong;

  • 作者单位

    Nanjing Univ Sci & Technol Sch Energy & Power Engn MIIT Key Lab Thermal Control Elect Equipment Xiaolingwei Rd 200 Nanjing 210094 Jiangsu Peoples R China|Nanjing Univ Sci & Technol Sch Energy & Power Engn Adv Combust Lab Nanjing 210094 Jiangsu Peoples R China;

    Southeast Univ Sch Energy & Environm Minist Educ Key Lab Energy Thermal Convers & Control Nanjing 210096 Jiangsu Peoples R China;

    Univ Wyoming Dept Chem Univ Ave Laramie WY 82071 USA|Univ Wyoming Dept Petr Engn Univ Ave Laramie WY 82071 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    NH3; Chemical looping ammonia generation (CLAG); N-desorption reaction; ZrO2;

    机译：NH3;化学循环氨生成（CLAG）;脱氮反应;氧化锆;

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