Thesis
Activated carbon surface modification for carbon dioxide adsorption
Washington State University
Master of Science (MS), Washington State University
2014
Handle:
https://hdl.handle.net/2376/102779
Abstract
Carbon dioxide removal from the atmosphere as well as from methane and synthesis gases is an important objective in industries as well as in the environment. The objective of this study was to modify the surface of activated carbon to introduce basic nitrogen functional groups for the purpose of carbon dioxide adsorption. Ammonium sulfate was proposed as a modification agent and was used to modify the surface of chemically activated carbon and physically activated carbon. It was found that ammonium sulfate improves the carbon dioxide adsorption capacity of both physically activated and chemically activated carbon. It was found that chemically activated carbon produced using a phosphoric acid to biomass ratio of 3:1 with a 10 % loading of ammonium sulfate had the highest capacity for carbon dioxide adsorption with a maximum adsorption of 97 % carbon dioxide and the slowest decline in adsorption capacity over time. This carbon had a high degree of selective adsorption of carbon dioxide over methane. Complete regeneration of activated carbon modified by ammonium sulfate was accomplished by oven heating at 105 ˚C for 1 hour. Basic functional groups were present on the modified activated carbon surface
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Details
- Title
- Activated carbon surface modification for carbon dioxide adsorption
- Creators
- Gayatri Yadavalli
- Contributors
- Hanwu Lei (Degree Supervisor)
- Awarding Institution
- Washington State University
- Academic Unit
- Civil and Environmental Engineering, Department of
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University; [Pullman, Washington] :
- Identifiers
- 99900525125801842
- Language
- English
- Resource Type
- Thesis