The role of iron in the selective amination of 1,2-butanediol to 2-amino-1-butanol over Co–Ba–Fe/γ-Al₂O₃

摘要

The catalytic synthesis of 2-amino-1-butanol from 1,2-butanediol and ammonia was studied in a continuous fixed-bed reactor. The catalysts prepared by doping Co–Ba/γ-Al₂O₃ with Sr, Ni, Ca, Zn, La, Fe, Mg, Zr, Mn, Cr were examined, among which the Co–Ba–Fe/γ-Al₂O₃ catalyst showed the best catalytic performance. These catalysts were characterized by XRD, XPS, and TPR. It was found that the addition of iron led to the formation of crystalline Co₇Fe₃, which modified the catalytic activity of Co species, inhibited the generation of CoAl₂O₄, improved the stability and enhanced the reduction of the Co–Ba–Fe/γ-Al₂O₃ catalyst. The conversion of 1,2-butanediol was 72.9% and the selectivity of 2-amino-1-butanol achieved 73.3% under the optimum reaction conditions.