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首页> 外文期刊>Environmental Science & Technology >Vanadium As a Potential Membrane Material for Carbon Capture: Effects of Minor Flue Gas Species
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Vanadium As a Potential Membrane Material for Carbon Capture: Effects of Minor Flue Gas Species

机译:钒作为碳捕集的潜在膜材料:次要烟气物种的影响

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摘要

Vanadium and its surface oxides were studied as a potential nitrogen-selective membrane material for indirect carbon capture from coal or natural gas power plants. The effects of minor flue gas components (SO_2, NO, NO_2, H_2O, and O_2) on vanadium at 500-600 ℃ were investigated by thermochemical exposure in combination with X-ray photo-electron spectroscopy (XPS), scanning electron microscopy (SEM), and in situ X-ray diffraction (XRD). The results showed that SO_2, NO, and NO_2 are unlikely to have adsorbed on the surface vanadium oxides at 600 ℃ after exposure for up to 10 h, although NO and NO_2 may have exhibited oxidizing effects (e.g., exposure to 250 ppmv NO/N_2 resulted in an 2.4 times increase in surface V_2O_5 compared to exposure to just N_2). We hypothesize that decomposition of surface vanadium oxides and diffusion of surface oxygen into the metal bulk are both important mechanisms affecting the composition and morphology of the vanadium membrane. The results and hypothesis suggest that the carbon capture performance of the vanadium membrane can potentially be strengthened by material and process improvements such as alloying, operating temperature reduction, and flue gas treatment.
机译:钒及其表面氧化物已被研究为一种潜在的氮选择性膜材料,可用于从燃煤或天然气发电厂间接捕集碳。结合X射线光电子能谱(XPS),扫描电子显微镜(SEM)研究了化学暴露在500-600℃条件下微量烟气组分SO_2,NO,NO_2,H_2O和O_2对钒的影响。 )和原位X射线衍射(XRD)。结果表明,在暴露长达10 h的600℃下,SO_2,NO和NO_2不太可能吸附在表面钒氧化物上,尽管NO和NO_2可能具有氧化作用(例如,暴露于250 ppmv NO / N_2导致与仅暴露于N_2相比,表面V_2O_5增长了2.4倍)。我们假设表面钒氧化物的分解和表面氧向金属本体的扩散都是影响钒膜组成和形态的重要机制。结果和假设表明,钒膜的碳捕获性能可以通过材料和工艺改进(例如合金化,降低工作温度和烟道气处理)来增强。

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  • 来源
    《Environmental Science & Technology》 |2017年第19期|11459-11467|共9页
  • 作者单位

    Department of Energy Resources Engineering, Stanford University, 367 Panama Street, Stanford, California 94305, United States;

    Department of Energy Resources Engineering, Stanford University, 367 Panama Street, Stanford, California 94305, United States,Department of Chemical and Biological Engineering, Colorado School of Mines, 1613 Illinois Street, Golden, Colorado 80401, United States;

    Department of Energy Resources Engineering, Stanford University, 367 Panama Street, Stanford, California 94305, United States,Applied Materials, 974 E. Arques Avenue, Sunnyvale, California 94085, United States;

    Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States;

    Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States;

    Department of Energy Resources Engineering, Stanford University, 367 Panama Street, Stanford, California 94305, United States,Department of Chemical and Biological Engineering, Colorado School of Mines, 1613 Illinois Street, Golden, Colorado 80401, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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