Alayat Abdulbaset, Echeverria Elena, Sotoudehniakarani Farid, Mcllroy David N, McDonald Armando G
Renewable Materials Program, Department of Forest, Rangeland and Fire Sciences, University of Idaho, Moscow, ID 83844-1133, USA.
Department of Physics, Oklahoma State University, Stillwater, OK 74078-3072, USA.
Materials (Basel). 2019 Jun 4;12(11):1810. doi: 10.3390/ma12111810.
The effects of AlO coating on the performance of silica nanospring (NS) supported Co catalysts for Fischer-Tropsch synthesis (FTS) were evaluated in a quartz fixed-bed microreactor. The Co/NS-AlO catalysts were synthesized by coating the Co/NS and NS with AlO by an alkoxide-based sol-gel method (NS-Al-A and NS-Al-B, respectively) and then by decorating them with Co. Co deposition was via an impregnation method. Catalysts were characterized before the FTS reaction by the Brunauer-Emmett-Teller (BET) method, X-ray diffraction, transmission electron microscopy, temperature programmed reduction, X-ray photoelectron spectroscopy, differential thermal analysis and thermogravimetric analysis in order to find correlations between physico-chemical properties of catalysts and catalytic performance. The products of the FTS were trapped and analyzed by GC-TCD and GC-MS to determine the CO conversion and reaction selectivity. The AlO coated NS catalyst had a significant affect in FTS activity and selectivity in both Co/NS-AlO catalysts. A high CO conversion (82.4%) and Σ > C (86.3%) yield were obtained on the Co/NS-Al-B catalyst, whereas the CO conversion was 62.8% and Σ > C was 58.5% on the Co/NS-Al-A catalyst under the same FTS experimental condition. The Co/NS-Al-A catalyst yielded the aromatic selectivity of 10.2% and oxygenated compounds.
在石英固定床微反应器中评估了AlO涂层对用于费托合成（FTS）的二氧化硅纳米弹簧（NS）负载Co催化剂性能的影响。通过基于醇盐的溶胶 - 凝胶法分别用AlO涂覆Co/NS和NS来合成Co/NS - AlO催化剂（分别为NS - Al - A和NS - Al - B），然后用Co进行修饰。Co沉积通过浸渍法进行。在FTS反应之前，通过布鲁诺尔 - 埃米特 - 泰勒（BET）法、X射线衍射、透射电子显微镜、程序升温还原、X射线光电子能谱、差示热分析和热重分析对催化剂进行表征，以找出催化剂的物理化学性质与催化性能之间的相关性。FTS产物通过气相色谱 - 热导检测器（GC - TCD）和气相色谱 - 质谱联用仪（GC - MS）进行捕集和分析，以确定CO转化率和反应选择性。AlO涂覆的NS催化剂对两种Co/NS - AlO催化剂的FTS活性和选择性都有显著影响。在相同的FTS实验条件下，Co/NS - Al - B催化剂上获得了高CO转化率（82.4%）和∑>C（86.3%）产率，而Co/NS - Al - A催化剂上的CO转化率为62.8%，∑>C为58.5%。Co/NS - Al - A催化剂的芳烃选择性为10.2%，还有含氧化合物。
