大孔介孔氧化铝的制备及加氢性能研究

发布时间：2018-03-14 11:01

本文选题：介孔-大孔　切入点：碳酸铝铵　出处：《应用化工》2017年02期 　论文类型：期刊论文

【摘要】：以NH4HCO3和Al2(SO4)3为原料,采用共沉淀法,在温和条件下制备出γ-Al_2O_3前体为碳酸铝铵(AACH)和无定形的拟薄水铝石(Al OOH),然后焙烧,成功制备出具有高比表面积的介孔-大孔γ-Al_2O_3载体,并通过NH4HCO3溶液重建γ-Al_2O_3载体孔结构,使其孔径分布相对集中。利用XRD、吡啶吸附FTIR、N2吸附-脱附、SEM及透射电镜等表征方法对调变前后样品进行表征。以催化裂化柴油(FCC)为原料,在小型固定床反应器上进行30 h的加氢性能评价。结果表明,结构重建后的γ-Al_2O_3载体制备的Ni Mo P/γ-Al_2O_3催化剂在反应趋于稳定时,其脱硫、脱氮率达到98.3%和94.1%,加氢性能明显高于结构重建前和以传统γ-Al_2O_3载体制备的催化剂。
[Abstract]:Using NH4HCO3 and Al2(SO4)3 as raw materials, 纬 -Al _ 2O _ 3 precursor of 纬 -Al _ 2O _ 3 was prepared by co-precipitation method under mild conditions. The precursor of 纬 -Al _ 2O _ 3 was ammonium aluminum carbonate (AAC) and amorphous pseudo-boehmite (AlOHH). Then calcined, mesoporous 纬 -Al _ 2O _ 3-Al _ 2O _ 3 carrier with high specific surface area was successfully prepared. The pore structure of 纬 -Al2O3 carrier was reconstructed by NH4HCO3 solution, and the pore size distribution was relatively concentrated. The samples were characterized by XRD, FTIRN _ 2 adsorption-desorption with pyridine and transmission electron microscope. FCCs of FCC diesel oil were used as feedstock. The hydrogenation performance evaluation was carried out in a small fixed-bed reactor for 30 hours. The results showed that the NiMo P/ 纬 -Al _ 2O _ 3 catalyst prepared by 纬 -Al _ 2O _ 3 carrier after structural reconstruction was desulphurized when the reaction became stable. The denitrification rates reached 98.3% and 94.1, and the hydrogenation performance was obviously higher than that of the catalysts prepared before structural reconstruction and with the traditional 纬 -Al _ 2O _ 3 carrier.
【作者单位】：辽宁石油化工大学化学化工与环境学部;
【基金】：辽宁省教育厅科技研究一般项目(L2014507)
【分类号】：TQ133.1;O643.36

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