纳米Ni-Mo复合氧化物催化剂加氢脱氧性能研究

Nano Ni-Mo composite oxide catalysts hydrodeoxy genation performance

用溶胶-凝胶法制备了非负载Ni-Mo复合氧化物催化剂,用X-射线能谱、N_2吸附-脱附、SEM等手段对催化剂进行了表征。以苯酚和乙酸为探针分子考察了在制备过程中添加硝酸铝和乙醇对催化加氢脱氧性能的影响。由结果可知:溶胶-凝胶法可制备纳米结构的Ni-Mo复合氧化物催化剂,颗粒尺寸达70 nm;溶胶凝胶溶液中不添加硝酸铝可提高催化剂中活性组分Mo和Ni的利用率;溶剂中乙醇的体积分数为50%所制备的催化剂具有较高加氢脱氧活性,在0.3 MPa,270℃,液时空速2 h^(-1)的条件下,催化剂催化苯酚加氢脱氧的脱氧率达到98.4%。

Unsupported Ni-Mo composite oxide catalysts were successfully prepared by the sol-gel method, and they were characterized using X-ray energy spectrum, N2 adsorption-desorption, and SEM. The effects of aluminum nitrate and ethanol content on the hydrodeoxygenation activity of the catalysts were investigated emphatically using phenol and acetic acid as probe compounds. The results show that the catalysts prepared by sol-gel method can be higher specific surface area and the double mesoporous structure, and the particle size of the catalysts is 70 nm. The utilization rate of Mo and Ni active component is improved, when the sol-gel solution has no aluminum nitrate. The catalyst with excellent HDO performance was obtained at 50 percent of ethanol as solvent. At 0.3 MPa, 270 ℃ , LHSV = 2 h-1, the deoxygenation ratio of the phenol is 98.4%.