Protrusions induction by carbon black on surface of activated carbon to enhance its catalytic activity
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Updated Time：2022-05-14 17:11:35
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Oral Presentation
Start Time：2022-05-27 09:40 （Asia/Shanghai）
Duration：20min
Session：[S4] Energy Science and Technology » [S4-2] Energy Science and Technology-2
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Abstract
ABSTRACT:
Catalytic methane decomposition is considered as a promising hydrogen production technology without CO2 emission. Catalyst is generally required to reduce reaction temperature, among which, carbon-based catalysts are widely studied due to their excellent catalytic performance and low cost. Activated carbon (AC), although presents high initial activity, suffers from fast deactivation; In comparison, carbon black (CB) shows low activity but good stability, and its catalytic performance maintains ability inspires a novel method for AC optimization. According to the physical property difference of AC and CB, a novel catalyst is prepared by doping CB on the surface and in the pores of AC. And surface property modified by HNO3 is also recommended, because the increase of functional groups further improves the adsorption performance. The results illustrate that ACN+BP2000-20:3 show advantages in hydrogen yield, weight increase velocity and carbon yield. Meanwhile, not only the initial activity is improved by a large margin, but also the deactivation time is progressively prolonged. The analysis results show that CB loading significantly increased the number of micropores, which is the key factor for the high initial catalytic activity. And the protrusion, induced by CB, are characterized by unique graphene edges defect, which provides active sites and furtherly promotes the reaction.
Catalytic methane decomposition is considered as a promising hydrogen production technology without CO2 emission. Catalyst is generally required to reduce reaction temperature, among which, carbon-based catalysts are widely studied due to their excellent catalytic performance and low cost. Activated carbon (AC), although presents high initial activity, suffers from fast deactivation; In comparison, carbon black (CB) shows low activity but good stability, and its catalytic performance maintains ability inspires a novel method for AC optimization. According to the physical property difference of AC and CB, a novel catalyst is prepared by doping CB on the surface and in the pores of AC. And surface property modified by HNO3 is also recommended, because the increase of functional groups further improves the adsorption performance. The results illustrate that ACN+BP2000-20:3 show advantages in hydrogen yield, weight increase velocity and carbon yield. Meanwhile, not only the initial activity is improved by a large margin, but also the deactivation time is progressively prolonged. The analysis results show that CB loading significantly increased the number of micropores, which is the key factor for the high initial catalytic activity. And the protrusion, induced by CB, are characterized by unique graphene edges defect, which provides active sites and furtherly promotes the reaction.
Keywords
Catalytic methane decomposition; Activated carbon; Carbon black; HNO3 modification; Defect structure
Speaker
Chunmei XIN
China University of Mining and TechnologyChunmei Xin, is a postgraduate of China University of Mining and Technology. Her research interest is methane catalytic decomposition. She has published relevant work in Fuel. She was awarded the first prize of “The 14th national college students' social practice and science and technology competition for energy conservation and emission reduction”. She also received financial support from the “2022 Graduate Innovation Program Fund of China University of Mining and Technology”.
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