A series of silica doped alumina (SDA) [Si-Al₂O₃] having high surface area and narrow pore size distribution are synthesized with varying amount of silica and used as a support material to facilitate incorporation of Co, Mg and Zr into it. These supported Co-Mg-Zr/SDA materials are used as catalysts for selective synthesis of middle distillate through Fischer-Tropsch synthesis (FTS) reaction. Trace quantity (∼0.05 wt %) of ruthenium (Ru) has also been used as a promoter for Co -Mg-Zr/SDA catalyst to improve the reducibility, selectivity towards middle distillate and increasing the catalyst life. The detail characterizations of catalysts indicate that Ru promotion and narrow pore size distribution facilitate CO conversion and middle distillate selectivity. Synthetic syngas of composition (H₂ = 28.63%, CO = 14.27%, CO₂ = 9.25%, CH₄ = 1.0%, and N₂ = 46.85%), which may be obtained after coal gasification and H₂ enrichment process by water gas shift (WGS) reaction has been used as a reactant for middle distillate synthesis. The role of Ru and silica proportion on Co-Mg-Zr/SDA is investigated through Low Temperature Fischer-Tropsch (LTFT) synthesis at 220 °C temperature and 30 bar pressure. The surface acidity of the Ru/Co-Mg-Zr/SDA catalyst plays an important role for middle distillate selectivity and CO conversion. To determine the durability of catalysts, 300 h continuous experimental run has been conducted at Gas Hourly Space Velocity (GHSV) of 500 h⁻¹. Among the catalysts in the present study, Ru/Co-Mg-Zr/SDA(7.5) catalyst shows highest CO conversion (94.2%) with 85% selectivity of C₆-C₁₉ hydrocarbon.

一系列二氧化硅掺杂的氧化铝（SDA）[Si-Al ₂ O ₃用不同量的二氧化硅合成具有高表面积和狭窄的孔径分布的石墨，并用作载体材料以促进向其中掺入Co，Mg和Zr。这些负载的Co-Mg-Zr / SDA材料用作通过费-托合成（FTS）反应选择性合成中间馏分的催化剂。痕量（〜0.05 wt％）的钌（Ru）也已用作Co -Mg-Zr / SDA催化剂的促进剂，以提高还原性，对中间馏分的选择性并延长催化剂寿命。催化剂的详细表征表明，Ru的促进作用和狭窄的孔径分布有助于CO转化和中间馏分的选择性。组成的合成合成气（H ₂  = 28.63％，CO = 14.27％，CO ₂  = 9.25％，CH 在煤气化和通过水煤气变换（WGS）反应进行的H ₂富集过程之后获得的 N ＝₄＝ 1.0％，N ₂＝ 46.85％已被用作中间馏分合成的反应物。通过在220°C的温度和30 bar的压力下进行低温费-托（LTFT）合成，研究了Ru和二氧化硅比例对Co-Mg-Zr / SDA的作用。Ru / Co-Mg-Zr / SDA催化剂的表面酸度对中间馏分的选择性和CO转化起重要作用。为了确定催化剂的耐久性，已在500 h ^-1的气体时空速（GHSV）下进行了300 h连续实验。在本研究的催化剂中，Ru / Co-Mg-Zr / SDA（7.5）催化剂显示最高的CO转化率（94.2％），C ₆ -C ₁₉烃的选择性为85％。