菲加氢裂解制BTX的催化剂研究

采用等体积浸渍法制备了Ni/ZSM-5、Ni/HY、Ni/Al₂O₃和Ni/USY四个系列Ni含量不同的催化剂,在固定床反应器中考察了四类催化剂对菲的加氢裂化制BTX反应的催化性能。借助BET、SEM、热重和差热分析对催化剂的形貌、比表面积、平均孔径及积炭情况进行了表征,结合其结果对催化剂性能进行了分析。结果表明,Ni/HY和Ni/USY催化剂中Ni含量为12%时性能最优,收率可达52%。Al₂O₃催化剂的最佳Ni含量为6%,该系催化剂初始性能尚可,但失活较快;ZSM-5型分子筛催化剂性能较差。

Study on catalysts for phenanthrene hydrocracking to BTX

4 series of catalyst with different Ni loadings,including Ni/ZSM-5,Ni/HY,Ni/Al2O3 and Ni/USY,were prepared by volumetric immersion method.The catalytic performance of the prepared catalysts for phenanthrene hydrocracking was evaluated using a fixed bed reactor.BET and SEM were used to obtain the catalysts’ phase structure,surface area and average pore size.The carbon deposition of catalysts after reaction were measured by TG/DSC.The results showed that 12% Ni loading on HY and USY zeolites had best catalytic activity for phenanthrene hydrocracking with the BTX yield of 52%.As to Ni/Al2O3 the best nickel loading was 6%,and this catalyst just had a good catalytic activity at beginning and deactivated quickly.Ni/ZSM-5 had poor catalytic activity.