van den Bekerom Dirk, den Harder Niek, Minea Teofil, Gatti Nicola, Linares Jose Palomares, Bongers Waldo, van de Sanden Richard, van Rooij Gerard
Dutch Institute for Fundamental Energy Research.
Dutch Institute for Fundamental Energy Research; University of Trento.
J Vis Exp. 2017 Aug 1(126):55066. doi: 10.3791/55066.
A flowing microwave plasma based methodology for converting electric energy into internal and/or translational modes of stable molecules with the purpose of efficiently driving non-equilibrium chemistry is discussed. The advantage of a flowing plasma reactor is that continuous chemical processes can be driven with the flexibility of startup times in the seconds timescale. The plasma approach is generically suitable for conversion/activation of stable molecules such as CO2, N2 and CH4. Here the reduction of CO2 to CO is used as a model system: the complementary diagnostics illustrate how a baseline thermodynamic equilibrium conversion can be exceeded by the intrinsic non-equilibrium from high vibrational excitation. Laser (Rayleigh) scattering is used to measure the reactor temperature and Fourier Transform Infrared Spectroscopy (FTIR) to characterize in situ internal (vibrational) excitation as well as the effluent composition to monitor conversion and selectivity.
讨论了一种基于流动微波等离子体的方法，该方法旨在将电能转化为稳定分子的内部和/或平移模式，以有效地驱动非平衡化学过程。流动等离子体反应器的优点是可以在秒级的启动时间灵活性下驱动连续的化学过程。等离子体方法通常适用于稳定分子如二氧化碳、氮气和甲烷的转化/活化。这里将二氧化碳还原为一氧化碳用作模型系统：互补诊断说明了如何通过高振动激发产生的固有非平衡来超过基线热力学平衡转化率。激光（瑞利）散射用于测量反应器温度，傅里叶变换红外光谱（FTIR）用于原位表征内部（振动）激发以及流出物组成，以监测转化率和选择性。
