Absorption of sulfur dioxide from simulated flue gas by polyethyleneimine-phosphoric acid solution. Issue 23 (1st December 2016)

• Record Type: Journal Article
• Authors: Bo, Wen; Li, Hongxia; Zhang, Junjie; Song, Xiangjia; Hu, Jinshan; Liu, Ce
• Is Part Of: Environmental technology. Volume 37:Issue 23(2016)
• Page Start: 3062
• Page End: 3070
• Publication Date: 2016-12-01
• Subjects: Polyethyleneimine -- desulfurization -- adsorption -- desorption -- flue gas; Environmental engineering -- Periodicals; Environmental protection -- Periodicals; 628.05
• DOI: 10.1080/21622515.2016.1175513
• Languages: English
• ISSNs: 0959-3330

Abstract

ABSTRACT: Clean fuel technologies have been widely developed in current society because fuel combustion can directly bring about the emission of hazardous gasses such as SO2 . Flue gas desulfurization by polyethyleneimine (PEI)-phosphoric acid solution is an efficient desulfurization method. In this research, the PEI and the additive H3 PO4 were used as absorption solution. SO2 was absorbed by the system and desorbed from the loaded solution. The cycle operation was also analyzed. Some technology conditions such as the concentration of PEI, the temperature, the gas flow rate, the concentration of SO2 and the pH value were experimentally researched. With the optimized process, the absorption efficiency of this system could reach 98% and the desorption efficiency was over 60%, showing good absorption/desorption capability. With this efficient approach, the present study may open a new window for developing high-performance absorbents which can make SO2 be well desorbed from the loaded solution and better reused in the flue gas desulfurization.