李华荣,罗正鸿

• 1:厦门大学化学化工学院化学工程与生物工程系

摘要(Abstract)：

在分析负载茂金属催化的丙烯气相聚合过程中催化剂颗粒破碎行为基础上,提出了该过程聚丙烯颗粒内部传质与传热物理模型,耦合丙烯聚合本征反应建立了丙烯气相聚合过程的单颗粒模型:改进的多粒模型。采用上述模型得到了丙烯气相聚合过程中聚丙烯颗粒内部的单体浓度、平均温度、颗粒内部的温度梯度以及催化剂活性中心浓度等的变化规律。模拟结果表明,聚丙烯颗粒内部的温度及催化剂浓度变化较小,而颗粒内部的传质阻力对聚合影响较大。另外,模拟结果也表明负载茂金属催化剂颗粒在聚合过程是一个由外到里的逐层破裂过程。

关键词(KeyWords)： 负载茂金属催化剂;丙烯气相聚合;多粒模型;质量与热量传递;催化剂破裂

Abstract:

Keywords:

基金项目(Foundation): 中国石油化工股份有限公司资助项目(x505029)

作者(Author): 李华荣,罗正鸿

参考文献(References)：

• [1]McKenna T F,Soares J B P.Single particle modelling for olefin polymerization on supported catalysts:A review and proposals for future developments[J].Chem Eng Sci,2001,56(13):3931-3949.
• [2]Hutchinson R A,Chen C M,Ray W H.Polymerization of olefins through heteogeneous catalysis X:Modeling of particle growth and morphology[J].J App Poly Sci,1992,44(8):1389-1414.
• [3]Sun J Z,Enrtdyrin C,Reichert K H.Particle growth modeling of gas phase polymerization of butadiene[J].J App Poly Sci,1997,64(2):203-212.
• [4]LUO Zheng-hong(罗正鸿),WEN Shao-hua(温少桦),SU Pei-lin(苏培林),et al.Intraparticle mass and heat transport model of polypropylene in a loop reactor(环管反应器中聚丙烯颗粒内部的质量与热量传递模型)[J].J Chem Eng of Chinese Univ(高校化学工程学报),2009,23(2):258-262.
• [5]Bonini F.Propylene polymerization through supported metallocene/MAO catalysts:kinetic analysis and modeling[J].J Polym Sci Part A:Polym Chem,1995,33(14):2393-2402.
• [6]Alexiadis A,Andes C,Ferrari D,et al.Mathematical modeling of homopolymerization on supported metallocene catalysts[J].Macrom Mater Eng,2004,289(5):457-466.
• [7]Diana A,Estenoz M G C.Olefin polymerization using supported metallocene catalysts:Process representation scheme and mathematical model[J].J App Poly Sci,2001,81(2):285-311.
• [8]XIE Rui-jin(谢瑞金),HUANG Kai(黄凯),LUO Zheng-hong(罗正鸿).Intraparticle mass transport model for ethylene polymerization catalyzed with metallocenecatalyst(基于茂金属催化剂的聚乙烯颗粒内部的单颗粒传质模型)[J].Petrochemical Technology(石油化工),2009,38(10):1093-1097.
• [9]Ferrero M A,Chiovetta M G.Catalyst fragmentation during propylene polymerization:Part I.The effects of grain size and structure[J].Polym Eng Sci,1987,27(19):1436-1447.
• [10]LIU X G(刘兴高).Modeling and simulation of heterogeneous catalyzed propylene polymerization(非均相催化丙稀聚合的建模与仿真)[J].Chinese J Chem Eng(中国化学工程学报),2007,15(14):545-553.
• [11]Floyd S,Chio K Y,Taylor T W,et al.Polymerization of olefins through heterogeneous catalysis.Ⅲ.Polymer particle modeling with an analysis of intraparticle heat and mass transfer effects[J].J Appl Polym Sci,1986,32(1):2935-2960.