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以催化重整石脑油为原料,以水热处理磷改性HZSM-5为催化剂,在小型固定床反应装置上,考察了水热处理磷改性方法制备催化剂的催化裂解性能。结果表明,磷改性HZSM-5经水热处理后与未改性HZSM-5相比,水热稳定性明显改善,当磷负载量为3%wt时,PZSM-5具有较高的活性和丙烯选择性。催化裂解反应过程中选择适宜的工艺条件可有效的抑制副反应的发生。综合考虑丙烯及双烯收率,确定最佳的反应条件为:温度650℃,体积空速4h-1,水油体积比0.75,反应压力0.2MPa。
Using catalytic reforming naphtha as raw material and hydrothermal treatment of phosphorus-modified HZSM-5 as catalyst, the catalytic cracking performance of catalysts prepared by hydrothermal treatment of phosphorus was investigated on a small fixed bed reactor. The results showed that the hydrothermal stability of PZSM-5 was obviously improved when hydrofluoric modified HZSM-5 was hydrothermally treated compared with unmodified HZSM-5, and PZSM-5 possessed higher activity when propylene loading was 3% wt. Selective. The selection of suitable process conditions during the catalytic cracking reaction can effectively inhibit the occurrence of side reactions. Considering the yield of propylene and diene, the optimum reaction conditions were as follows: temperature 650 ℃, space velocity 4h-1, water-oil volume ratio 0.75 and reaction pressure 0.2MPa.