关键词: 催化裂化, 重汽油, 临氢, 选择性, 脱砷剂

Abstract: A hydrogenation catalyst for selective arsenic removal from FCC heavy gasoline was synthesized by equal volume impregnation method with macroporous γ-Al₂O₃ as carrier and Mo-Ni as active component. The effects of aluminum oxide powder, sol,active metal and metal atom ratio on the catalyst activity and selectivity were studied. The results showed that the pore diameter distribution of aluminum oxide had a great influence on arsenic removal activities of the catalysts, and the large pores were good for improving arsenic removal activity. The organic acid as a sol could significantly increase the proportion of large pore in the carrier, and the appropriate Ni/(Ni+Mo) ratio was beneficial to the high arsenic removal activity and selectivity of the catalysts. The catalysts exhibited a good long-term stability and arsenic capacity, and the performance was comparable to the commercial arsenic removal catalysts.

Key words: catalytic cracking, heavy gasoline, hydrogenation, selectivity, arsenic removal absorbent