Sancheti Sonam V, Yadav Ganapati D, Ghosh Pushpito K
Department of Chemical Engineering, Institute of Chemical Technology, Nathalal Parekh Marg, Matunga, Mumbai 400019, India.
ACS Omega. 2020 Mar 6;5(10):5061-5071. doi: 10.1021/acsomega.9b03993. eCollection 2020 Mar 17.
Methyl palmitate (or triglyceride) was converted into C olefin with remarkable selectivity using nickel-molybdenum oxides on the mesoporous titanosilicate support. The olefin has one carbon atom less than the acid portion of the ester. A new catalyst NiMoK/TS-1 was synthesized in which the effect of acidity of supports and molybdenum loading on the decarboxylation conversion along with product selectivity was investigated in methyl palmitate conversion into C olefin. The prepared catalysts were analyzed using ammonia-temperature-programmed desorption (NH-TPD), thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Brunauer-Emmett-Teller (BET) techniques. The reaction was carried out using a vapor-phase fixed-bed downflow reactor system at atmospheric pressure. The NiMoK/TS-1 catalyst at a weight hourly space velocity (WHSV) of 5.6/h was found to be selective toward C olefin. The catalyst was stable up to 15 h, and it can be regenerated with no considerable decrease in the activity even after fourth reuse. Beyond 653 K, the conversion of methyl palmitate increased but the selectivity for C products and C olefin was decreased.
使用介孔钛硅酸盐载体上的镍钼氧化物可将棕榈酸甲酯（或甘油三酯）以显著的选择性转化为烯烃。该烯烃比酯的酸部分少一个碳原子。合成了一种新型催化剂NiMoK/TS-1，研究了载体酸度和钼负载量对棕榈酸甲酯转化为烯烃过程中脱羧转化率及产物选择性的影响。使用氨程序升温脱附（NH-TPD）、热重分析（TGA）、X射线光电子能谱（XPS）、X射线衍射（XRD）、傅里叶变换红外（FTIR）光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和布鲁诺尔-埃米特-泰勒（BET）技术对制备的催化剂进行了分析。反应在常压下使用气相固定床向下流动反应器系统进行。发现重量时空速（WHSV）为5.6/h的NiMoK/TS-1催化剂对烯烃具有选择性。该催化剂在长达15小时内保持稳定，即使在第四次重复使用后再生，活性也没有显著降低。超过653K时，棕榈酸甲酯的转化率增加，但对C产物和烯烃的选择性降低。
