Preparation and characterization of Ni/Al2O3 for carbon nanofiber fabrication from CO2 hydrogenation
學年 110
學期 2
出版（發表）日期 2022-04-01
作品名稱 Preparation and characterization of Ni/Al2O3 for carbon nanofiber fabrication from CO2 hydrogenation
作品名稱（其他語言）
著者 Kuen-Song Lin, Cheng-Yan Tang, Ndumiso Vukile Mdlovu, Chi-Jung Chang, Chao-Lung Chiang, Zhi-Min Cai
單位
出版者
著錄名稱、卷期、頁數 Catalysis Today, 388, 341-350
摘要 In this study, Ni/Al2O3 was prepared with an impregnation method for CO2 hydrogenation into carbon nanofibers (CNFs). High purity CNFs were acquired from CO2 hydrogenation at 500 °C and 1 atm over Ni/Al2O3 catalyst after a liquid phase extraction process, removing the used catalysts and by-products. The particle properties of as-prepared Ni/Al2O3 have been well characterized for comparison with the commercial ones. The results of XPS spectra and XRPD patterns indicated that the commercial, as-prepared, and used Ni/Al2O3 were multicomponent with various crystal phases. The as-prepared Ni/Al2O3 can be sufficiently exposed in CO2 atmosphere for higher catalytic performances owing to its unique microstructure with higher specific surface area (429.2 m2/g). Both EXAFS and XANES spectra have shown that the first shell of Ni atom in commercial, as-prepared, and used Ni/Al2O3 were Nisingle bondO with bond distances of 1.61, 1.63, and 1.62 Å, respectively. The configuration of fabricated CNFs was characterized by its unique ID/IG (Intensities of D-band/G-band) ratio of 0.23 in the Raman spectrum. Solid tubular shape with 30 nm diameter of CNFs was observed using FE–SEM and HR–TEM. Thermodynamic analyses indicate that CO2 hydrogenation into CNFs is a spontaneous and exothermic reaction with an optimal temperature of 500 °C.
關鍵字 CO2 hydrogenation, carbon nanofiber, Ni/Al2O3 catalyst, EXAFS, XANES
語言 en
ISSN
期刊性質 國內
收錄於 SCI SSCI Scopus
產學合作
通訊作者
審稿制度 1
國別 NLD
公開徵稿
出版型式 ,電子版
SDGS 氣候行動,產業創新與基礎設施