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- W4213301629 abstract "KOH-modified biochars derived from by-products of microalgae pyrolysis were prepared to adsorb gaseous H 2 S. Influences of various parameters (e.g., mass ratio between KOH and biochars, and adsorption temperature) on desulfurization performance were investigated. Kinetics/mechanisms of H 2 S adsorption, and reutilization of spent adsorbents for capturing gaseous Hg 0 were also explored. Results exhibited that KOH modification greatly improved the desulfurization performance of biochars via improving the pore structures of biochar and increasing the surfaces oxygen-containing group. The modified biochars (CK2 and SK2) achieve optimal desulfurization performance, with an adsorption capacity of 59.10 mg/g for CK2 and 42.30 mg/g for SK2, respectively. Adsorption temperature showed a double effect on desulfurization. S 0 and sulfate were successfully detected on biochar surface after adsorption via XPS and XRD analysis, indicating that chemical adsorption occurred in the H 2 S adsorption. Kinetic study showed that physical adsorption governed the H 2 S adsorption process, and mass transfer was the main control step of the desulfurization process. The spent adsorbents (i.e., spent containing-sulfur biochars) could capture efficiently Hg 0 in gas and shown good competitiveness as compared with commercial activated carbon. • Porous carbons derived from by-products of microalgae pyrolysis were used to adsorb H 2 S. • The prepared porous carbons exhibit good H 2 S adsorption performance. • Spent adsorbent is containing-sulfur porous carbon, which can efficiently capture Hg 0 . • Spent adsorbent shows better competitiveness for capturing Hg 0 than activated carbon. • This technology achieves pyrolysis waste utilization and separation of H 2 S and Hg 0 ." @default.
- W4213301629 created "2022-02-24" @default.
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- W4213301629 creator A5069692555 @default.
- W4213301629 date "2022-06-01" @default.
- W4213301629 modified "2023-10-17" @default.
- W4213301629 title "Biochars derived from by-products of microalgae pyrolysis for sorption of gaseous H2S" @default.
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- W4213301629 doi "https://doi.org/10.1016/j.jece.2022.107370" @default.
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