Valuable light hydrocarbons such as ethane, propane, butane and corresponding olefins were successfully synthesized using a plasma‐assisted catalytic system. The catalytic activity of titania nanoparticles seemed to selectively increase the conversion of intermediates into longer C₅₊ hydrocarbons, while suppressing the dehydrogenation of intermediates to coke. In addition, DFT calculations revealed that the intermediate hydrocarbon radicals on titania active sites seemed to prefer to form longer hydrocarbons rather than coke in terms of dehydrogenation energy and relative adsorption energy. In addition, the proper selection of support material in terms of dielectric constant, particle size, and pore size could greatly improve the selectivity toward saturated light hydrocarbons. The fraction of saturated hydrocarbons in C₂–C₄ was measured over 80 %. By adopting macroporous silica with a large pore size, the required bed weight was appreciably reduced, without compromising performance.

中文翻译：

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TiO2 /多孔SiO2的等离子体辅助催化作用下甲烷合成轻烃

使用等离子辅助催化系统成功合成了重要的轻烃，如乙烷，丙烷，丁烷和相应的烯烃。二氧化钛纳米颗粒的催化活性似乎选择性地增加了中间体向较长C ₅₊的转化率烃，同时抑制中间体脱氢成焦炭。此外，DFT计算表明，就脱氢能和相对吸附能而言，二氧化钛活性位点上的中间烃基似乎更倾向于形成更长的烃而不是焦炭。此外，载体材料的介电常数，粒径和孔径大小方面的适当选择可以大大提高朝向饱和轻质烃的选择性。在C _{2 –} C _4中，饱和烃的含量超过80％。通过采用具有大孔径的大孔二氧化硅，可在不影响性能的情况下显着降低所需的床重。