Department for Plasma Physics and Nuclear Fusion, National Institute for Lasers, Plasma and Radiation Physics Magurele, Bucharest, Romania.
Department of Organic Chemistry, Biochemistry and Catalysis, University of Bucharest Bucharest, Romania.
Front Chem. 2013 Jun 20;1:7. doi: 10.3389/fchem.2013.00007. eCollection 2013.
The oxidation of toluene in air was investigated using a dielectric barrier discharge (DBD) combined with a Pd/Al2O3 catalyst. When using only plasma, rather low selectivity toward CO2 was obtained: 32-35%. By filling the DBD reactor with Pd/Al2O3 catalyst the CO2 selectivity was significantly enhanced (80-90%), however, a large amount of toluene was desorbed from the catalyst when the discharge was operated. By filling a quarter of the discharge gap with catalyst and placing the rest of the catalyst downstream of the plasma reactor, an important increase of CO2 selectivity (~75%) and a 15% increase in toluene conversion were achieved as compared to the results with plasma alone. The catalyst exhibited a very good stability in this reaction.
采用介质阻挡放电（DBD）与 Pd/Al2O3 催化剂相结合的方式研究了空气中甲苯的氧化。仅使用等离子体时，CO2 的选择性相当低：32-35%。通过在 DBD 反应器中填充 Pd/Al2O3 催化剂，CO2 的选择性得到了显著提高（80-90%），然而，当放电操作时，大量的甲苯从催化剂上解吸。当将催化剂填充到放电间隙的四分之一并用其余的催化剂放置在等离子体反应器的下游时，与单独使用等离子体相比，CO2 选择性显著增加（~75%），甲苯转化率提高了 15%。该催化剂在该反应中表现出非常好的稳定性。
