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首页> 外文会议>AIChE Annual Meeting >Propylene Polymerization: Process Modelling and Simulation
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Propylene Polymerization: Process Modelling and Simulation

机译：丙烯聚合：工艺建模和仿真

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Polypropene has demonstrated certain advantages in improved strength,stiffness and higher temperature capability over polyethylene and other terminal polyolefins.1 Polypropene (PP) is a translucent commodity thermoplastic material with excellent physical and mechanical properties.PP is produced by polymerizing propene with suitable catalysts.In the face of existing enormous market for polypropene the global polypropene market is expected to reach $126.89 billion by 2026 growing at a CAGR of 6.4%,continuing holding a significant portion of the market share of the commodity thermoplastics globally.2 Due to the predictable growth of consumption,there's a yearning to intensify the productivity and yield in existing processes to mollify its demand.Catalysts for use in Ziegler Natta polymerization have been widely researched.They are generally categorized into two groups on the basis of solubility.3 Heterogeneous catalysts: Titanium or vanadium-based compounds used in conjunction with organoaluminum complexes,and;Homogeneous catalysts: Complexes are based on Titanium,Zirconium,or Hafnium and include metallocenes and/or multidentate oxygen and nitrogen-based ligands.There are three categories of processes generally employed to produce isotactic polypropene (iPP),homo-and co-polymers,namely,liquid slurry processes,bulk or liquid pool processes,and gas-phase processes.Aspen Plus is a market-leading process modeling tool used for conceptual design,optimization,and performance monitoring for the chemical,polymer,specialty chemical,metals and minerals,and coal power industries.Aspen Polymers is the market-leading technology for accurate and reliable design and optimization of polymer processes.It is fully integrated with industry-standard simulators including Aspen Plus~R,Aspen Plus~R Dynamics and Aspen Custom Modeler~R.4 The propene gas-phase polymerization process model illustrates the use of Aspen Polymers Plus to model a gas-phase UNIPOL process for propylene homo-polymerization using a multi-site Ziegler-Natta kinetic model.In the present simulation study,an Aspen Polymers Plus model is developed to simulate a polypropene gas-phase UNIPOL flow sheet.The flow sheet includes the fluidized bed reactor,the gas recycle/cooling loop,discharge,and purge units.The fluidized bed reactor is modeled using the CSTR reactor in Aspen Plus with two phases: a gas phase and a polymer phase.The focal segments in the application of simulation software's to polymerization processes,specially polymer component characterization,polymerization kinetics,and thermodynamic property requirements,are pronounced in this work.In present study,POLYPCSF,Perturbed-Chain Statistical Associating Fluid Theory (PCSAFT) thermodynamic model is used to relate the gas phase monomer,hydrogen,etc.composition to their concentrations in the polymer phase.The multisite Ziegler-Natta kinetic model is used to describe the polymerization reactions in the polymer phase.The kinetic model calculates the reaction rates for the components and polymer attributes at each site type.Further,parametric analysis is carried out to investigate the effects of temperature,pressure,catalyst amount,and catalyst/co-catalyst ratio on polypropene properties.
机译：聚丙烯在聚乙烯和其他末端聚烯烃上的强度，刚度和更高的温度能力方面表现出了某些优点.1聚丙烯（PP）是一种半丙烯（PP）是一种半透明的商品热塑性材料，具有优异的物理和机械性能。PP是通过用合适的催化剂聚合丙烯而产生的。面对巨大的聚丙烯市场，全球聚丙烯市场预计将达到1268.9亿美元，在2026年的增长率上涨6.4％，继续持有商品热塑性塑料的大部分市场份额，这是由于可预测的增长消费，渴望加强现有过程中的生产力和产量，以利用其需求。辛格勒纳塔聚合的催化剂已被广泛研究。它们通常在溶解度的基础上归类为两组。钛或基于钒的化合物与有机有机相结合铝配合物，和;均相催化剂：配合物基于钛，锆或铪，包括茂金属和/或多夜氧和氮的配体。通常用于产生全乳酸聚丙烯（IPP），同性恋的三类工艺。和共聚物，即液体浆料工艺，散装或液体池过程，以及气相过程。Aspen Plus是用于概念设计，优化和性能监测的市场领先的工艺，用于化学，聚合物，专业化学，金属和矿物质和煤炭产业.Aspen聚合物是市场领先的技术，用于精确和可靠的设计和优化聚合物方法。它与工业标准模拟器完全集成，包括Aspen Plus〜R，Aspen Plus〜R Dynamics和Aspen定制建模器〜R.4丙烯气相聚合过程模型说明了Aspen聚合物加上模拟丙烯Homo-PomeciTIZ的气相单极法使用多网站Ziegler-Natta动力学模型。在本发明的仿真研究中，开发了ASPEN聚合物加模型以模拟聚丙烯气相自卸流量表。流量表包括流化床反应器，气体回收/冷却循环，放电和吹扫单元。使用Aspen Plus中的CSTR反应器进行流化床反应器，具有两相：气相和聚合物相。焦段在仿真软件应用于聚合过程中，特别是聚合物组分表征，聚合动力学和热力学性质要求在这项工作中发音。目前的研究，PolyPCSF，扰动链统计关联流体理论（PCSAFT）热力学模型用于将气相单体，氢等。它们的浓度联系起来在聚合物相中。多电石Ziegler-Natta动力学模型用于描述聚合物相中的聚合反应。动力学模型计算每种位点型组分和聚合物属性的反应速率。进行参数分析，以研究温度，压力，催化剂量和催化剂/助催化剂比对聚丙烯特性的影响。

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