Role of Amine Structure on Hydrogen Sulfide Capture from Dilute Gas Streams Using Solid Adsorbents
| Autor: | Christopher W. Jones, Chukwuemeka Okolie, Achintya Sujan, Claudia N. Okonkwo, Guanghui Zhu |
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| Rok vydání: | 2018 |
| Předmět: |
General Chemical Engineering
Hydrogen sulfide Energy Engineering and Power Technology 02 engineering and technology equipment and supplies 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound Renewable natural gas Fuel Technology Adsorption chemistry Biogas Chemical engineering Low temperature combustion Amine gas treating 0210 nano-technology |
| Zdroj: | Energy & Fuels. 32:6926-6933 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/acs.energyfuels.8b00936 |
| Popis: | The hydrogen sulfide composition in biogas ranges from 0 to 5% depending on the feed source to the biogas digester. To meet renewable natural gas specifications of 0–4 ppm of H2S content, technologies that remove H2S from raw biogas feeds are needed. This contribution assesses three adsorbents with similar textural and physical properties but with different amines grafted to the surface. Specifically, materials containing primary, secondary, and tertiary amines at the end of a propyl surface linker grafted on a silica support are explored. H2S adsorption isotherms and cyclic studies are presented for these materials, and it is shown that secondary amines have the best amine efficiency while tertiary amines are the most stable for H2S capture, of the materials studied. The results suggest the consideration of secondary and tertiary amines for the design of amine adsorbents suitable for H2S removal in dilute gas streams over multiple cycles. |
| Databáze: | OpenAIRE |
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