黏合剂对其ZSM-5分子筛成型物裂解石脑油的影响  

Influence of adhesive on the performance of extruded ZSM-5 catalysts in naphtha cracking

作　　者：吉媛媛[1] 满毅[1] 王焕茹[1] 杨菁[1] 

机构地区：[1]中国石油化工股份有限公司北京化工研究院,北京100013

出　　处：《燃料化学学报》2012年第6期727-731,共5页Journal of Fuel Chemistry and Technology

基　　金：中国石油化工股份有限公司项目(410003)

摘　　要：为考察成型时,黏合剂性能对ZSM-5分子筛的影响,对同一分子筛用六种不同黏合剂捏合,挤条成型,进行SEM、NH3-TPD和N2物理吸附表征。结果表明,六个成型物在形貌和BET比表面积均无明显差异,二次孔数量明显比分子筛原粉增加。所用纯硅溶胶黏合剂的成型物,其NH3-TPD酸量、微孔体积和微孔比表面积低于其分子筛原粉。所用含铝黏合剂的成型物,其NH3-TPD酸量、微孔体积和微孔比表面积变化不明显,BJH累积孔体积明显增加。在固定床反应器中于600℃裂解石脑油。发现,纯硅溶胶黏合剂成型物的乙烯+丙烯收率明显低于含铝黏合剂。Six adhesives were used to prepare ZSM-5 catalysts through kneading and extruding. The extruded ZSM-5 catalysts were characterized by SEM, NH3-TPD and N2 physical sorption and used in naphtha cracking. The results indicated that these ZSM-5 extrudants have no significant differences in their morphology and specific surface area, but have markedly more secondary pores compared with the original ZSM-5 sample. With pure silicon collosol as the adhesive, the resultant ZSM-5 extrudant exhibits lower acid amount, cumulative pore volume, micropore surface area and volume than the original ZSM-5 sample; however, the acid amount, surface area and cumulative pore volume of the extrudants obtained with aluminum-containing adhesives are almost identical to those of the original ZSM-5. For the naphtha cracking in a fixed bed reactor at 600 ℃, the yield of ethylene plus propylene over the extruded ZSM-5 catalyst with silicon collosol as additive is lower than that over the extrudants obtained with aluminum-containing adhesives.

关 键 词：ZSM-5分子筛 黏合剂 石脑油 裂解 丙烯 乙烯 

分 类 号：TQ032.41[化学工程]