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Nitrogen oxides reduction by liquid petroleum gas over Co–Ce–Ti catalysts in a simulated rotary reactor
Journal of the Energy Institute ( IF 5.7 ) Pub Date : 2019-07-05 , DOI: 10.1016/j.joei.2019.07.002
Xingxing Cheng , Peiliang Sun , Yilan Xu , Zhiqiang Wang , Meixia Wang , Chunyuan Ma

Hydrocarbons could be used as the reductant for elimination of NOx emissions. Liquid petroleum gas, with higher carbon hydrocarbons and cheaper costs, may be of practical value as reducing agents. Due to the consumption of hydrocarbons by oxygen, the NOx reduction efficiency is significantly inhibited by oxygen in the flue gas. In this research, a novel rotary reactor, realizing the alternating cycle of adsorption zone and reduction zone, was proposed to overcome this negative effect. Co–Ce–Ti mixed oxide catalysts synthesized by a sol–gel method were tested in a simulated rotary reactor for NOx removal by liquid petroleum gas and characterized by SEM, BET, XRD and XPS. The results showed that catalysts exhibited better NO conversion efficiency at higher temperature but were highly susceptible to oxygen. Catalysts achieved nearly full removal of NOx from flue gas at 300 °C in a simulated rotary reactor, and 300 °C is considered to be the most optimum temperature with lower energy consumption and excellent flue gas purification performance.



中文翻译:

液态石油气在模拟旋转反应器中通过Co-Ce-Ti催化剂还原液态氮

碳氢化合物可以用作还原剂为消除NO X排放。具有较高碳碳氢化合物且成本较低的液态石油气作为还原剂可能具有实用价值。由于氧气的烃的消耗,NO X的还原效率是显著通过氧气的烟道气中的抑制。在这项研究中,提出了一种新型的旋转反应器,以实现吸附区和还原区的交替循环,以克服这种负面影响。通过溶胶-凝胶法合成的Co-Ce-Ti混合氧化物催化剂在模拟旋转反应器中测试了NO x用液态石油气去除,并用SEM,BET,XRD和XPS表征。结果表明,催化剂在较高的温度下表现出较好的NO转化效率,但对氧气高度敏感。在模拟旋转反应器中,催化剂在300°C时几乎可以将烟气中的NO x完全去除,并且300°C被认为是最理想的温度,具有较低的能耗和出色的烟气净化性能。

更新日期:2019-07-05
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