中孔氧化铝在抗铁污染FCC催化剂中的应用研究

分别以纤维素和拟薄水铝石为模板剂和铝源,采用溶胶-凝胶法制备了中孔氧化铝材料,并将其作为基质组分用于抗铁污染FCC催化剂的制备。利用XRD、N2吸附-脱附、FT-IR、SEM和ACE技术对所制备中孔氧化铝和催化剂进行了表征和反应性能评价。表征结果表明:与常规拟薄水铝石相比,所制备中孔氧化铝材料具有更大的比表面积、孔体积和孔径,更高的表面酸密度。评价结果表明:与常规FCC催化剂相比,铁污染对含中孔氧化铝FCC催化剂催化裂化反应性能的不利影响更小,催化剂的抗铁污染性能得到了显著改善。

APPLICATION OF MESOPOROUS ALUMINA IN PREPARATION OF ANTI-IRON CONTAMINATION FCC CATALYST

Mesoporous alumina was prepared through sol-gel method using cellulose and pseudo boehmite as template and Al source, respectively, and further used as matrix material for the preparation of anti-iron contamination FCC catalyst, which were characterized by XRD, N2 adsorption-desorption, FT-IR, SEM and ACE techniques. Characterization results indicated that the prepared mesoporous alumina had much higher surface area, pore volume, pore size and acidity density in contrast with pseudo boehmite. Evaluation results illustrated that the negative effect caused by iron contamination on the catalytic cracking performance of the FCC catalyst containing mesoporous alumina was much lower, compared with traditional FCC catalyst, indicating that the anti-iron contamination performance of the catalyst was significantly improved.