Abstract The rod-like SBA-15 was transformed into fibrous type SBA-15 (F-SBA-15). The Ni/F-SBA-15 was catalytically evaluated in CO2 methanation and compared with conventional Ni/SBA-15. A superior catalytic performance was shown by Ni/F-SBA-15 (CO2 conversion = 99.7%, and CH4 yield = 98.2%) than Ni/SBA-15 (CO2 conversion = 91.1%, and CH4 yield = 87.5%). This phenomenon was attributed to the favorable physicochemical properties of F-SBA-15 as evidenced by the characterization results. A higher homogeneity of finer Ni was embedded onto the F-SBA-15 support, subsequently strengthened the Ni interaction with F-SBA-15, and increased the amount of moderate basic sites. The in situ FTIR studies evidenced the CO2 methanation over both catalysts proceeded via CO2 dissociation pathway. Three intermediate species (linear carbonyl, unidentate, and bidentate carbonates) were detected for Ni/F-SBA-15, while only bidentate carbonates were detected for Ni/SBA-15, signifying excellent catalytic attributes of Ni/F-SBA-15. Additionally, Ni/F-SBA-15 demonstrated higher stability and coke resistance ability than Ni/SBA-15.

中文翻译：

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Ni/Fibrous type SBA-15：用于CO2甲烷化的高活性和抗焦炭催化剂

摘要 棒状SBA-15转化为纤维状SBA-15（F-SBA-15）。Ni/F-SBA-15 在 CO2 甲烷化中进行了催化评估，并与传统的 Ni/SBA-15 进行了比较。Ni/F-SBA-15（CO2 转化率 = 99.7%，CH4 产率 = 98.2%）比 Ni/SBA-15（CO2 转化率 = 91.1%，CH4 产率 = 87.5%）显示出优异的催化性能。这种现象归因于 F-SBA-15 有利的物理化学性质，如表征结果所证明的那样。F-SBA-15 载体上嵌入了更高均匀性的更细的 Ni，随后加强了 Ni 与 F-SBA-15 的相互作用，并增加了中等碱性位点的数量。原位 FTIR 研究证明了通过 CO2 解离途径进行的两种催化剂上的 CO2 甲烷化。三种中间体（线性羰基、单齿、Ni/F-SBA-15 检测到双齿碳酸盐），而 Ni/SBA-15 仅检测到双齿碳酸盐，表明 Ni/F-SBA-15 具有优异的催化特性。此外，Ni/F-SBA-15 表现出比 Ni/SBA-15 更高的稳定性和抗焦炭能力。