Mesoporous Zeolite Y-Supported Co Nanoparticles as Efficient Fischer–Tropsch Catalysts for Selective Synthesis of Diesel Fuel

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• 作者：Jincan Kang ; Xiaojie Wang ; Xiaobo Peng ; Yudan Yang ; Kang Cheng ; Qinghong Zhang ; Ye Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：December 28, 2016
• 年：2016
• 卷：55
• 期：51
• 页码：13008-13019
• 全文大小：754K
• ISSN：1520-5045

文摘

Cobalt nanoparticles were loaded onto mesoporous zeolite Na–Y (Na–meso-Y) by melt infiltration and impregnation methods. As compared to impregnation, melt infiltration resulted in Co nanoparticles with a narrower size distribution. The Co/Na–meso-Y catalyst prepared by the melt infiltration exhibited higher C₁₀–C₂₀ (diesel fuel) selectivity. The hydrogenolysis of heavier hydrocarbons was confirmed to occur under Fischer–Tropsch reaction conditions. Our studies for the hydrogenolysis of n-hexadecane revealed that the catalyst by the melt infiltration was more active and selective for the formation of C₁₀–C₁₅ hydrocarbons. We propose that the narrower Co size distribution favors the selective hydrogenolysis and thus the C₁₀–C₂₀ selectivity in Fischer–Tropsch synthesis. The addition of Mn with a proper content could further improve the diesel fuel selectivity to 65% by suppressing the formations of CH₄ and lighter hydrocarbons. The Mn-modified Co/Na–meso-Y catalyst was very stable and no deactivation was observed in 1000 h.