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Gaseous Hydrogen Sulfide Removal Using Macroalgae Biochars Modified Synergistically by H 2 SO 4 /H 2 O 2
Author(s) -
Chen Hui,
Han Xuan,
Liu Yangxian
Publication year - 2021
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000461
Subject(s) - flue gas desulfurization , adsorption , hydrogen sulfide , chemistry , chemical engineering , mass transfer , sulfur , kinetics , nuclear chemistry , organic chemistry , chromatography , physics , quantum mechanics , engineering
A novel H 2 SO 4 /H 2 O 2 combining modification was used to modify two kinds of macroalgae ( Sargassum and Enteromorpha ) biochars to remove gaseous H 2 S. Desulfurization performance, mechanism, and kinetics of the biochars were studied. The proposed H 2 SO 4 /H 2 O 2 combining modification greatly improves the desulfurization performance of biochars. Compared with common adsorbents, the biochars achieve better desulfurization effects. Desulfurization processes follow the pseudo‐first‐order model and external mass transfer is the control step. H 2 S adsorption over biochars means physical adsorption, while chemical adsorption is auxiliary. H 2 SO 4 /H 2 O 2 combining modification improves the desulfurization performance by enhancing the pore structure and increasing O‐containing functional groups.