Experimental Investigation of SO2 Removal from Flue Gases by Cleaning with Solution of Lime Suspension and Formic Acid

Processes

Dragiša Đorđić¹  Milena Stošić²  Boris Obrovski²  Dragan Adamović²  Zoran Čepić²  Slavko Đurić³  Milan Milotić³ 

[1] Faculty of Ecology, Independent University of Banja Luka, Veljka Mlađenovića 12e, 78000 Banja Luka, Bosnia and Herzegovina;Faculty of Technical Sciences, University of Novi Sad, Trg Dositeja Obradovića 6, 21000 Novi Sad, Serbia;Faculty of Transport and Traffic Engineering, University of East Sarajevo, Vojvode Mišića 52, 74000 Doboj, Bosnia and Herzegovina;

关键词: sulfur dioxide;    flue gas desulfurization;    lime suspension;    formic acid;    diesel fuel;   

DOI  :  10.3390/pr10030537

来源: DOAJ

【 摘 要 】

The experimental investigation presented in this research was performed in order to examine the possibility of the removal of SO₂ from flue gases by cleaning with a solution of lime suspension and formic acid (Ca(OH)₂ and HCOOH). Research was conducted in a laboratory plant (rotary kiln) of 44 kW. The mass of the lime suspension (LS) was 400 g. The mass of the LS was homogenized (mixed) in a sample cup with 2 g (0.5%), 4 g (1%) and 8 g (2%) of 60% formic acid. The solution was placed in a gas washing bottle, where a partial flow of flue gas generated by the combustion of diesel fuel was injected. Simultaneously with the diesel fuel combustion, SO₂ from a bottle was injected in a rotary kiln. The average mass concentration of SO₂ in the flue gas at the entry point of the gas washing bottle was around 2900 ppm. The results indicated that the absorption of SO₂ by the cleaning of flue gas with LS was 96.83%. Adding formic acid to the LS in mass ratios of 0.5% (2 g), 1% (4 g) and 2% (8 g) resulted in absorptions of 99.25%, 98.77% and 98%, respectively. The absorption of flue gases in the gas washing bottle with LS, with the addition of formic acid in the mentioned ratios, showed a reduction in sulfates and pH value, and a rise in sulfides and calcium, respectively.

【 授权许可】

Unknown