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镧对PTSNNA/AL₂O₃催化剂丙烷脱氢反应性能的影响

Effect of lanthanum addition on reaction properties of PtSnNa/Al₂O₃ catalyst for propane dehydrogenation

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【Author】 ZHANG Yi-wei~1,ZHOU Yu-ming~1,YE Zhi-liang~2,WANG Yu~(2,3),XU Yi~2,WU Pei-cheng~2(1.Department of Chemistry and Chemical Engineering,Southeast University,Nanjing 210096,China;2.Department of Catalytic Enterprise,Nanjing Linear Alkyl Benzene Plant,Nanjing 210046,China;3.College of Chemistry and Chemical Engineering,Nanjing University,Nanjing 210093,China)

【机构】东南大学化学化工系；南京烷基苯厂催化事业部；南京烷基苯厂催化事业部江苏南京210096；江苏南京210096；江苏南京210046；南京大学化学化工学院；江苏南京210093；

【摘要】制备了镧改性的PTSNNA/LA/AL2O3催化剂,用于丙烷脱氢反应研究。结果表明镧的添加对PTSNNA/AL2O3催化剂的丙烷脱氢反应性能影响明显,当镧添加量(质量分数)为0.7%时,PTSNNA(0.3)/LA/AL2O3催化剂的丙烯收率最大,而过量镧的加入不利于脱氢反应的进行。NA+和LA3+的协同调变作用可以明显抑制催化剂表面的积炭。更多还原

【Abstract】 Lanthanum modified PtSnNaLa/Al₂O₃ catalyst was prepared for propane dehydrogenation.The results indicated that the addition of La had obvious influence on the catalytic performance of PtSnNa/Al₂O₃ catalyst and the yield of propene was able to reach maximum when the additional mass content of La was 0.7%.However,the excess amount of La is disadvantageous to the reaction.The synergetic effect of La³⁺ and Na⁺ could prevent the support from coking effectively.更多还原