Role of Amine Structure on Hydrogen Sulfide Capture from Dilute Gas Streams Using Solid Adsorbents [electronic resource]

• Ngôn ngữ: eng
• Ký hiệu phân loại: 648.8 Storage
• Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2018
• Mô tả vật lý: Size: p. 6926-6933 : , digital, PDF file.
• Bộ sưu tập: Metadata
• ID: 263108
• Chủ đề: 1. 09 biomass fuels; 2. Carbon capture; 3. Catalysis (heterogeneous); 4. Defects, membrane; 5. Materials and chemistry by design

Tóm tắt

 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 H<
 sub>
 2<
 /sub>
 S content, technologies that remove H<
 sub>
 2<
 /sub>
 S 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. H<
 sub>
 2<
 /sub>
 S 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 H<
 sub>
 2<
 /sub>
 S capture, of the materials studied. The results suggest the consideration of secondary and tertiary amines for the design of amine adsorbents suitable for H<
 sub>
 2<
 /sub>
 S removal in dilute gas streams over multiple cycles.