混合丁烯齐聚Fe_((2/3)x)Ni_(1-x)SO_4-P_2O_5/γ-Al_2O_3催化剂制备及性能研究

Preparation of Fe_((2/3)x)Ni_(1-x)SO_4-P_2O_5/γ-Al_2O_3 catalyst and its performance in the oligomerization of mixed C4 olefins

浸渍法制备了用于混合丁烯齐聚反应的负载型Fe(2/3)xNi1-xSO4-P2O5/γ-Al2O3催化剂,在高压微型固定床反应器上考察了催化剂制备参数和反应条件对混合丁烯齐聚反应转化率和目的产物选择性的影响。结果表明,在3.0 MPa、100℃、空速为2 h-1的反应条件下,Fe/Ni原子比为2,Fe担载量为0.7 mmol/g(γ-Al2O3)时,用共浸渍法制备的催化剂对混合丁烯齐聚转化率和二聚物选择性分别高达50.7%和52.2%。此外,SO42-同γ-Al2O3相互作用对混合丁烯齐聚反应的有效活性中心有重要影响。

Supported Fe（2/3）xNi1-xSO4-P2O5/γ-Al2O3 catalysts were prepared through impregnation and used in the oligomerization of mixed C4 olefins;the effect of preparation parameters and reaction conditions on their oligomerization performance was investigated in a high pressure fixed-bed microreactor.The results demonstrated that under 3.0 MPa,100 ℃ and a volume space velocity of 2 h-1,the conversion of olefins and selectivity to dimer reach 50.7% and 52.2%,respectively,over the catalyst with a preferable Fe loading of 0.7 mmol/g（γ-Al2O3）and Fe/Ni atomic ratio of 2.In addition,it was found that the interaction between γ-Al2O3 and SO42-plays an important role in the efficiency of active sites.