An improved method of removal for high concentrations of NO by electro-scrubbing process |
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| Authors: | Sang Joon Chung Il Shik Moon |
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| Affiliation: | 1. Department of Chemistry and Science Institute, University of Iceland, 107 Reykjavík, Iceland;2. Department of Physics, Sophia University, Tokyo 102-8554, Japan;3. ARC Centre for Antimatter-Matter Studies, School of Chemical and Physical Sciences, Flinders University, Adelaide, SA 5001, Australia;4. Institute of Mathematical Sciences, University of Malaya, Kuala Lumpur 5063, Malaysia;5. Laboratório de Colisões Atómicas e Moleculares, CEFITEC, Departamento de Física, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal;1. Department of Chemical and Environmental Engineering/Centre of Excellence for Green Technologies, University of Nottingham, Malaysia Campus, 43500 Semenyih, Selangor, Malaysia;2. School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, 46150 Selangor, Malaysia;3. Chemical Engineering Department/Center for Engineering and Sustainable Development Research, De La Salle University, 2401 Taft Avenue, 1004 Manila, Philippines;4. NGLTech Sdn. Bhd., Suite 7-3, 7th Floor, Wisma UOA II, No. 21 Jalan Pinang, 50450 Kuala Lumpur, Malaysia;5. Chemical Engineering Department, Texas A&M University, College Station, TX 77843, United States;6. Chemical and Materials Engineering Department, King Abdulaziz University, Jeddah, 21589 Saudi Arabia;1. Department of Chemical & Biomolecular Engineering, University of Houston, Houston, TX 77204, USA;2. Cummins Inc., Columbus, IN 47201, USA |
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| Abstract: | In the Ag(II)/Ag(I) redox mediator integrated scrubber system, NO reacts with the Ag(II) ions produced by the electrochemical oxidation of Ag(I) in an electrochemical cell present in the scrubbing solution (aqueous HNO3 acid) to form NO2. This NO2 is then absorbed into the scrubbing solution and degraded to nitrate. Numerous experimental runs were carried out to evaluate the feasibility of the integrated system to treat industrial waste gases containing high NOx levels. The results showed that the levels of NO and NOx removal increased with increasing Ag(II) loading and contact time. Under optimized conditions, 93.5% and 73.3% of the NO and NOx, respectively, were removed by a single stage gas scrubber with 1.62 g L?1 Ag(II) operating at 25 °C and atmospheric pressure. |
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