Basic rules of NO oxidation by Fe2+/H2O2/AA directional decomposition system. (26th July 2017)

• Record Type: Journal Article
• Authors: Zhao, Haiqian; Gao, Xingcun; Liu, Chenghao; Wang, Zhonghua; Qi, Hanbing
• Is Part Of: Canadian journal of chemical engineering. Volume 96:Number 1(2018)
• Page Start: 27
• Page End: 32
• Publication Date: 2017-07-26
• Subjects: Fe2+/H2O2/AA system -- directional decomposition -- nitric oxide -- oxidation -- hydroxyl radical; Chemical engineering -- Periodicals; Technology -- Periodicals; 660.05
• DOI: 10.1002/cjce.22888
• Languages: English
• ISSNs: 0008-4034

Abstract

Abstract: Basic rules of NO oxidation by a Fe 2+ /H2 O2 /AA directional decomposition system were researched based on the technical background of flue gas NOx removal. Effects of gas‐liquid interfacial area, main gas, and solution parameters on NO oxidation efficiency ( η ) were analyzed. The results showed that adequate contact area was the precondition for high η by a Fe 2+ /H2 O2 /AA system. η decreased with the increase in NO concentration, which illustrated that this method would be efficient in oxidizing NO at a low concentration. η tended to decrease linearly with the growth in gas flow, however, the NO oxidation rate ( v ) rose with the increase in NO concentration and gas flow. η increased with the initial concentrations of H2 O2 and Fe 2+, but the amplitude decreased. Controlling the initial concentrations of H2 O2 and Fe 2+ to achieve reasonable synergies between generation rate and consumption rate of ·OH could weaken the invalid consumption of reactants. η increased with the increase in temperature in the range 30–60 °C, but it nearly did not change with temperature after 60 °C. This oxidation technology and the traditional wet flue gas desulphurization technology exhibited temperature synergy. Under typical pH of wet desulphurization, η and H2 O2 consumption rate did not change obviously.