长链烷烃（n-C10~13）脱氢制单烯烃催化剂的研究Ⅰ.氧化铝载体孔结构对催化剂性能的影响

通过n-C_10～13烷烃脱氢反应考察了氧化铝载体孔结构对长链烷烃脱氢催化剂性能的影响，结果表明，氧化铝载体的总孔容对催化剂影响不大，而有效孔容（孔径分布）影响催化剂的反应性能。小孔对载体的比表面积起主要作用，并影响催化剂的Pt分散度；大孔为催化剂金属位的积炭迁移提供有效空间。Pt与载体的强相互作用对提高催化剂的活性和稳定性有利。

Investigation on the catalysts for dehydrogenation of long chain paraffins (n-C10-13) to mono-olefins Ⅰ.Effect of pore structure of alumina support on behaviors of the catalysts

The effects of pore structure of the support on behaviors of the long chain paraffins dehydrogenation catalysts were investigated using dehydrogenation of n-C_10～13as the probe reaction. Results show that the effective pore volume (pore size distribution) had remarkable effects on the catalytic behaviors while overall pore volume had little influence; small pores played a crucial role in surface area of the supports and hence affected dispersion of Pt; larger pores provided effective space for coke migration from active sites to the supports. Strong interaction between Pt and the supports favored enhancement in activity and stability of the catalyst.