摘要
采用热沉淀法制备了非负载介孔 Co-Mo-Al_2O_3复合氧化物催化剂,利用X射线衍射(XRD)、扫描电子显微镜(SEM)和N_2吸附-脱附等方法分析了焙烧温度和超声振荡对催化剂微观结构的影响,并以苯酚为探针分子,在连续流动固定床反应器上考察了催化剂的加氢脱氧性能。结果表明:非负载介孔Co-Mo-Al_2O_3复合氧化物催化剂具有较窄的孔径分布(最可几孔径3.9 nm)和良好的苯酚加氢脱氧活性;在热沉淀过程中辅以超声振荡可有效控制催化剂的粒径尺寸、均匀度和介孔结构,可使催化剂的比表面积提高约50%,使苯酚的加氢脱氧活性提高约45%。
Unsupported mesoporous Co-Mo-Al2O3 catalysts were prepared using the thermal precipitation method, and the effects of calcination temperature and ultrasonic shaking on the microstructure of catalysts were analyzed by means of X-ray diffraction （XRD）, scanning electron microscopy （SEM） and N2 adsorption-desorption. The hydrodeoxygenation performance of Co-Mo-Al2O3 catalysts was investigated using phenol as a probe compound in a continuous flow fixed-bed reactor. The results showed that the pore size distribution of Co-Mo-Al2O3 catalysts was narrow and the hydrodeoxygenation performance of Co-Mo-Al2O3 catalysts exhibited superior. Using ultrasonic in precipitation process could effectively controlthe pore size, uniformity and mesopore structure of the catalysts particle, and increased specific surface area of catalyst about 50 % and hydrodeoxygenation activity of phenol about 45 %.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2010年第4期338-343,共6页
Chemical Reaction Engineering and Technology
