Department of Chemistry, Indian Institute of Technology Hyderabad, Telangana, 502 285, India.
Department of Chemistry, Indian Institute of Technology Hyderabad, Telangana, 502 285, India.
Environ Res. 2020 Apr;183:109286. doi: 10.1016/j.envres.2020.109286. Epub 2020 Feb 21.
The present study accomplishes the partial reduction of CO to carbon monoxide in a dielectric barrier discharge (DBD) reactor packed with g-CN and TiO or ZnO mixed with g-CN. Typical results indicate that the ZnO + g-CN packed reactor provides ~12% CO conversion at SIE of 4.8 J/mL, whereas DBD yields only ~7.5% conversion under the same experimental conditions. The best performance of the ZnO integrated system is due to the presence of more basic sites than those of the TiO packed system, which enables effective adsorption of acidic CO on its surface. The highest energy efficiency of 1.106 mmol/kJ is achieved with 5% ZnO + g-CN at SIE of 4.8 J/mL, whereas DBD exhibits only 0.746 mmol/kJ under the same conditions. Notably, catalyst packing also enables the highest carbon balance of ~97%.
本研究在填充 g-CN 和 TiO 或 ZnO 与 g-CN 混合物的介质阻挡放电（DBD）反应器中实现了 CO 到一氧化碳的部分还原。典型结果表明，在比能为 4.8 J/mL 时，ZnO+g-CN 填充的反应器提供了约 12%的 CO 转化率，而在相同的实验条件下，DBD 仅提供了约 7.5%的转化率。ZnO 集成系统的最佳性能归因于其表面存在比 TiO 填充系统更多的碱性位，这使其能够有效吸附酸性 CO。在比能为 4.8 J/mL 时，5% ZnO+g-CN 的能量效率最高，达到 1.106 mmol/kJ，而在相同条件下，DBD 仅为 0.746 mmol/kJ。值得注意的是，催化剂填充还实现了约 97%的最高碳平衡。
