The paper presents experimental data on the effects of boron concentration and introduction method in zeolite ZSM-5 on the physicochemical and catalytic properties of the latter during the conversion of propane into olefinic hydrocarbons. The catalysts were characterized using temperature-programmed ammonia desorption, low-temperature nitrogen adsorption, and high-resolution transmission electron microscopy. The activity and selectivity of the catalytic system depend on the boron concentration and technique of introduction in zeolite and on the textural and acidic characteristics of the zeolite support. It was found that olefinic hydrocarbons form in the largest amounts during propane conversion on the 1.0% B/ZSM-5 catalyst obtained by impregnation.
Vosmerikova et al. (Sun,) studied this question.