The Removal of Hydrogen Sulfide by Phosphate Ore Slurry | [Journal of Chemical Society of Pakistan • 2022]

Author(s):

1. Dongdong Zhang: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries,Kunming 650500, China

2. Chenghao Sha: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

3. Tianyan Feng: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

4. Bo Tan: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China

5. Ping Ning: Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China; National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries,Kunming 650500, China

Abstract:

In the present study, the reaction process of H2S removal by calcined phosphate ore slurry was investigated by XRD and kinetics analysis. It was found that the absorption amount of H2S was 69.47 mg in 200 min, and 70.09% of the absorption caused by calcium oxide, indicating that the reaction was mainly the action of calcium oxide. Furthermore, it is showed that Fe2O3 played an important role in the removal process. Fe(III) can be dissolved form the phosphate ore, and became an efficiently catalytic oxidant. H2S can be catalytically oxidized by Fe(III)/Fe(II) system. It was indicated that about 30% removal of H2S was caused by Fe(III). By the model analysis, the leaching reaction was belonged to the diffusion chemical reaction mixing control model. And the activation energy of the reaction was 17.224 kJ/mol obtained from the Arrhenius equation, which further proved that the reaction belonged to the mixed control model.

Page(s): 217-222

DOI: DOI not available

Published: Journal: Journal of Chemical Society of Pakistan, Volume: 44, Issue: 3, Year: 2022

Keywords:

Catalytic oxidation , Phosphate ore slurry , Hydrogen sulfide

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