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- Title
Surface modification on semi-coke-based activated carbon for enhanced separation of CH4/N2.
- Authors
Yang, Zhiyuan; Ning, Hailong; Liu, Jiaoping; Meng, Zhuoyue; Li, Yinyan; Ju, Xiaoqian; Chen, Zhiping
- Abstract
• SACs modified by plasma and organic reagent have efficient separation of CH 4 /N 2. • The SAC-ben-P-N 2 is the highest CH 4 /N 2 separation coefficient (5.08). • The SAC-ben has excellent dynamic adsorption and separation capabilities. Semi-coke-based activated carbons (SACs) were prepared using semi-coke powders as raw materials. They were modified by organic reagents (benzene, methyl benzoate, and ethyl acetate), low-temperature plasma (CH 4 and N 2 atmosphere), and organic reagent-low temperature plasma synergistic methods. FT-IR analysis showed that the corresponding functional groups were introduced to the surface of the SACs and the absorption peak intensities of the corresponding functional groups were enhanced via low-temperature plasma treatment. Low-temperature N 2 adsorption tests showed that the organic reagent played an important role for regulated mesopores of the SACs. The adsorption capacities of the SACs for CH 4 and N 2 were measured via static volumetric method, and their separation factors of the CH 4 /N 2 were calculated, in which the biggest separation factor (5.08) of CH 4 /N 2 was obtained from the SAC-ben-P-N 2 , which was synergistic modified by benzene and low-temperature plasma (N 2 atmosphere) and its breakthrough time of methane was 93 s. The biggest breakthrough time of methane (112 s) was acquired from the SAC-ben, which was modified by benzene and its separation factor of CH 4 /N 2 was 4.87.
- Subjects
METHYL benzoate; ADSORPTION capacity; ETHYL acetate; RAW materials; FUNCTIONAL groups
- Publication
Chemical Engineering Research & Design: Transactions of the Institution of Chemical Engineers Part A, 2020, Vol 161, p312
- ISSN
0263-8762
- Publication type
Article
- DOI
10.1016/j.cherd.2020.07.025