Open AccessAdsorb-Catalytic Removal of PH3 and H2S in Yellow Phosphorus Off-Gas by Metallic Modified Activated Carbon
Author(s) -
Rui Li,
Botao Wang,
Minyu Yao,
Fang Wang,
Tiancheng Liu,
Chenhui Liu,
Jiyun Gao,
Ping Ning,
Lijuan Jia
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/782/2/022117
Subject(s) - catalysis , adsorption , chemistry , activation energy , oxygen , phosphorus , activated carbon , metal , carbon fibers , volumetric flow rate , order of reaction , inorganic chemistry , kinetics , reaction rate constant , materials science , organic chemistry , thermodynamics , physics , quantum mechanics , composite number , composite material
Activated carbon modified with Cu 2+ and Co 2+ was used to remove PH 3 and H 2 S from yellow phosphorus off-gas. An orthogonal experiment was carried out to identify the superiority order of influencing factors and the optimal experimental parameters. For PH 3 , the superiority order was temperature > oxygen content > parch temperature > impregnant concentration (Cu 2+ ) > flow rate > diameter, whereas, for H 2 S, it was reaction temperature > oxygen content > impregnant concentration > parch temperature > diameter > flow rate. Following were the optimal experimental parameters for both PH 3 and H 2 S: reaction temperature, 95°C; impregnant concentration (Cu 2+ ), 0.25 mol/L; diameter of metallic modified activated carbon (MMAC), 3.5 mm; oxygen content, 1%; parch temperature, 300°C; and flow rate, 0.4 L/min. Regeneration of MMAC was effective for PH 3 but not compelling for H 2 S. The activation energy and reaction orders were calculated, and the transmission process was evaluated to assess the characteristics of the dynamics of the adsorb-catalytic reaction. The reaction orders were -0.8 and -0.76 for PH 3 and H 2 S and the average activation energies were 1247.6 and 134.4 J/mol for PH 3 and H 2 S, respectively. The adsorb-catalytic reaction was fast, and decreasing transmission resistance can play a key role in improving the performance of MMAC.