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Your search keyword '"Kan, Xiao‐Tian"' showing total 8 results
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8 results on '"Kan, Xiao‐Tian"'

7. Selective methanation of carbonate@carbon composite formed by the reaction of carbon dioxide with alkali metals.

Author

Zhu, Wei, Feng, Bao‐Qi, Zhang, Song, Zhao, Juan, Kan, Xiao‐Tian, and Teng, Yun‐Lei

Subjects
ALKALI metals, METHANATION, CARBON dioxide, METAL products, HYDROGENATION
Abstract

Summary: We systematically studied the thermochemical behaviors of alkali metals under the carbon dioxide (CO2) atmosphere and first investigated the hydromethanation performance of the alkali metal carbonate@carbon product formed in the reaction of CO2 with alkali metals. The on‐set reaction temperature of alkali metals with CO2 is at about 466, 584, and 595°C, respectively, following Li < Na < K. The experimental results indicate that COx‐free methane can be selectively and efficiently generated by hydrogenation of these carbonate@carbon composites at 450°C without a catalyst. Among these carbonate@carbon composites, the Li2CO3@carbon composite shows superior methanation performance. The selectivity of methanation is near 100%. The yield and content of methane are able to reach 30.3% and 26.6 mol%, respectively. This work provides an alternative method to produce methane, utilizing CO2 resources. [ABSTRACT FROM AUTHOR]

Published
2021
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8. Alkaline Earth Metal-Induced Hydrogenation of the CaO-Captured CO2to Methane at Room Temperature

Author

Mao, Guo-Cui, Kan, Xiao-Tian, Xiao, Ming-Xiu, Liu, Wen-Long, Dong, Bao-Xia, and Teng, Yun-Lei

Abstract

CaO is promising to be widely used to capture CO2. The produced CaCO3can be considered as solid CO2, which is also a plentiful, convenient, and useful carbon resource. Here, for the first time, we report that an alkaline earth metal can selectively induce the hydrogenation of the CaO-captured CO2(namely, the produced CaCO3) to CH4under room-temperature ball-milling conditions. The effects of ball-milling conditions and different catalysts on the methanation performance were studied. The results show that the CH4yield can reach 56.1%, and the CH4selectivity is 100%. When adding metal Ni, the CH4yield can be further increased. The experimental and density functional theory calculation results indicate that the in situ formed metal hydride plays a key role in the process of methanation. This work provides a novel and energy-saving method to convert the metal oxide-captured CO2/carbonate to CH4at room temperature.

Published
2022
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