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An active and selective production of gasoline-range hydrocarbons over bifunctional Co-based catalysts

机译：在双功能钴基催化剂上选择性地主动生产汽油范围的烃

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Catalytic performance of several bifunctional cobalt-based catalysts in slurry-phase Fischer-Tropsch synthesis has been investigated at 1 MPa and 230 deg C. The catalysts were prepared according to the conventional impregnation method using SiO_2, Al_2O_3, montmoril-lonite (K10~R), and various zeolites (USY, ZSM-5 and MCM-22) as a support. When an acidic support was applied, the formation of heavier hydrocarbons was retarded and the carbon number distribution was shifted to gasoline range (C4-C_(12)). Montmorillonite loaded with Co (Co/MONT) was a good catalyst, showing higher the CO conversion than Co/SiO_2 and Co/Al_2O_3. MCM-22 exhibited a superior performance to other zeolitic supports. With decreasing aluminum content, the activity of Co/MCM-22 catalysts was remarkably enhanced and the selectivity to methane and isoparaffins decreased. Besides the high CO conversion (55-60 percent), CJ isoparaffins were produced more selectively over Co/MCM-22 (43-53 percent) than Co/USY (43.5 percent) and Co/ZSM-5 (36 percent). Compared to the results under supercritical conditions, the slurry-phase conditions are more suitable for an active and selective production of gasoline-range hydrocarbons through the Fischer-Tropsch synthesis over MCM-22 supported Co catalysts.
机译：研究了几种双功能钴基催化剂在1 MPa和230℃下在淤浆相费-托合成中的催化性能。按照常规浸渍方法，使用SiO_2，Al_2O_3，蒙脱土-隆石（K10〜R ），以及各种沸石（USY，ZSM-5和MCM-22）作为支撑。当施加酸性载体时，较重的烃的形成被延迟并且碳数分布转移到汽油范围（C4-C_（12））。负载Co的蒙脱石（Co / MONT）是一种良好的催化剂，其CO转化率高于Co / SiO_2和Co / Al_2O_3。 MCM-22表现出优于其他沸石载体的性能。随着铝含量的降低，Co / MCM-22催化剂的活性显着增强，并且对甲烷和异链烷烃的选择性降低。除了高的CO转化率（55-60％）以外，与Co / USY（43.5％）和Co / ZSM-5（36％）相比，在Co / MCM-22（43-53％）上选择性生产CJ异链烷烃。与超临界条件下的结果相比，淤浆相条件更适合通过在MCM-22负载的Co催化剂上进行费-托合成进行活性和选择性生产汽油范围的烃。

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