采用新型基质材料和酸性调变技术制备了低焦炭高效重油催化裂化催化剂,用N2吸附-脱附和程序升温氨脱附(NH3-TPD)方法对催化剂进行了表征,并在实验室和工业提升管反应器中对催化剂的性能进行了评价.结果表明:研制的催化剂具有比表面积高、介孔体积大、强酸中心少、弱酸中心多等特点.实验室评价结果显示,与对比催化剂相比,该催化剂的重油收率降低1.37百分点,焦炭产率下降0.26百分点.工业应用结果表明,该催化剂具有重油转化能力强、焦炭选择性好的特点.%The catalytic cracking catalysts with low coke-yield and high heavy oil conversion performance were prepared using new matrix material and acidity modification technology and characterized by means of nitrogen adsorption/desorption and temperature-programmed desorption of ammonia(NH3-TPD)techniques The catalytic cracking performance of the catalysts was evaluated both in laboratory and industrial FCC riser reactor The results indicate that the prepared catalysts have the advantages of higher surface area,larger mesoporous volume,less strong acid sites and more weak acid sites Laboratory evaluation results show that compared with the reference catalyst,the heavy oil yield and coke yield of the prepared catalyst decreases by 1.37 and 0.26 percentage points,respectively The industrial application results demonstrate that the catalyst possess the characteristics of strong heavy oil conversion ability and good coke selectivity.
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