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Abstract:
Selective removal of carbonyl sulfide (COS) and hydrogen sulfide (H2S) is the key step for natural gas desulfurization due to thehighly toxic and corrosive features of these gaseous sulfides, and efficientand stable desulfurizers are urgently needed in the industry. Herein, wereport a class of nitrogen-functionalized, hierarchically lamellar carbonframeworks (N-HLCF-xs), which are obtained from the structuraltransformation of Zn zeolitic imidazolate frameworks via controllablecarbonization. The N-HLCF-xs possess the desirable characteristics oflarge Brunauer-Emmett-Teller surface areas (645-923 m2/g), combinedprimary three-dimensional microporosity and secondary two-dimensionallamellar microstructure, and high density of nitrogen base sites withenhanced pyridine ratio (17.52 wt %, 59.91%). The anchored nitrogenbase sites in N-HLCF-xs show improved accessibility, which boosts theirinteraction with acidic COS and H2S. As expected, N-HLCF-xs can beemployed as multifunctional and efficient desulfurizers for selective removal of COS and H2S from natural gas. COS wasfirsttransformed into H2S via catalytic hydrolysis, and the produced H2S was then captured and separated and catalyzed oxidation intoelemental sulfur. The above continuous processes can be achieved with solo N-HLCF-xs, giving extremely high efficiencies andreusability. Their integrated desulfurization performance was better than many desulfurizers used in the area, such as activatedcarbon,beta zeolite, MIL-101(Fe), K2CO3/gamma-Al2O3, and FeOx/TiO2
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INORGANIC CHEMISTRY
ISSN: 0020-1669
Year: 2022
Issue: 16
Volume: 61
Page: 6083-6093
4 . 6
JCR@2022
4 . 3 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
ESI HC Threshold:74
JCR Journal Grade:1
CAS Journal Grade:1
Cited Count:
SCOPUS Cited Count: 14
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
Affiliated Colleges: