NiP/SAPO-11催化脂肪酸甲酯加氢脱氧及产物的异构化

Hydrodeoxygenation of fatty acid methyl esters and isomerization of products over NiP/SAPO-11 catalysts

采用过量浸渍法制备了不同镍负载量的Ni P/SAPO-11催化剂,并用N2吸附-脱附、吡啶红外光谱、NH3-TPD、H2-TPR等技术对催化剂的物理化学性能进行了测试。脂肪酸甲酯催化加氢脱氧及产物异构化反应在固定床反应器上进行,液体产品分别用GC-MS和GC进行定性和定量分析。结果表明,在温度为340℃,压力为2.0 MPa,氢气流量为60 m L/min,重时空速为2.5 h-1的操作条件下,当Ni负载量为3%(质量分数)时,原料转化率可以达到97.8%,C15-18的收率84.5%,异构化率14.0%。

NiP/SAPO-11 catalysts with various nickle loading amounts were prepared by the impregnation method, and their properties were determined by means of N2 adsorption-desorption, DRIFTS of adsorbed pyridine, NH3-TPD and H2-TPR. The catalytic hydrodeoxygenation of fatty acid methyl esters （FAME） and isomerization of consecutive paraffin products were carried out in a fixed-bed continuous-flow reactor. Liquid products were qualitatively and quantitatively identified by GC-MS and GC respectively. Under the operation conditions of 340℃, 2.0 MPa, WHSV of 2.5 h^-1, H2 of 60 mL/min, the catalyst with 3% nickel loading （mass content） attained the high conversion of FAME （97.8%）, C15-18 yield （84.5%） and isomerization rate （14.0%）.