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Gas phase methanol synthesis with Raman spectroscopy for gas composition monitoring

机译：气相甲醇合成与拉曼光谱法用于气体成分监测

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摘要

Applicability of Raman spectroscopy for time-resolved gas composition monitoring during direct methanol synthesisviacarbon dioxide hydrogenation was investigated. A series of methanol synthesis experiments with varied reactor conditions was conducted and the reactor outlet stream was analyzed with in-line gas Raman spectroscopy. Concentrations of H-2, CO(2)and CO were determined directly from the acquired spectral data. For evaluation of methanol and water content a data reconciliation algorithm was developed. The algorithm involves estimation of the occurring chemical reactions' extents by iterative minimization of the difference between concentration values acquired from the experimental data and concentration values computed based on the mass conservation principle. The obtained experimental concentrations were compared and validated against the results of the reactor mathematical modeling, which is based upon a well-established kinetic interpretation of the process. The findings indicate good repeatability and accuracy of the developed gas analysis system, which together with the advantageous temporal resolution of the method, make Raman spectroscopy a promising technique for fast response monitoring of the process.
机译：研究了拉曼光谱对直接甲醇合成维基羰基二氧化碳氢化期间的时间分辨气体组成监测的适用性。进行了一系列具有不同反应器条件的甲醇合成实验，并用在线气体拉曼光谱分析反应器出口流。将H-2，CO（2）和CO的浓度直接从获得的光谱数据确定。对于甲醇和含水量的评价，开发了数据协调算法。该算法涉及通过迭代最小化从基于大规模保护原理计算的实验数据和浓度值所获取的浓度值之间的迭代最小化的发生的化学反应的差异。比较所获得的实验浓度并验证反应器数学建模的结果，这是基于该过程的良好的动力学解释。该发现表明了发达的气体分析系统的良好重复性和准确性，其与该方法的有利的时间分辨率一起，使拉曼光谱成为对该过程的快速响应监测的有希望的技术。

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  • 来源
    《RSC Advances》 |2020年第40期|共12页
  • 作者

    Maksimov Pavel; Laari Arto; Ruuskanen Vesa; Koiranen Tuomas; Ahola Jero;

  • 作者单位

    Lappeenranta Lahti Univ Technol LUT Sch Engn Sci POB 20 FI-53851 Lappeenranta Finland;

    Lappeenranta Lahti Univ Technol LUT Sch Engn Sci POB 20 FI-53851 Lappeenranta Finland;

    Lappeenranta Lahti Univ Technol LUT Sch Energy Syst POB 20 FI-53851 Lappeenranta Finland;

    Lappeenranta Lahti Univ Technol LUT Sch Engn Sci POB 20 FI-53851 Lappeenranta Finland;

    Lappeenranta Lahti Univ Technol LUT Sch Energy Syst POB 20 FI-53851 Lappeenranta Finland;

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  • 正文语种 eng
  • 中图分类 化学;
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