2021年3月15日 · In the present paper a new two-phase multi-scale mathematical model of a tubular loop reactor is presented to describe the bulk polymerization of propylene. The model comprises transient mass and energy balances for the liquid and solid phases and population balance equations to describe the spatio-temporal evolution of the particles size ...

2022年12月14日 · In the case of heterogeneous (impact-resistant) copolymers, polymerization is continued in a gas-phase reactor, where the addition of ethylene-propylene rubber provides better impact resistance. The loop reactor operates completely filled with the suspension.

Reactors other than stirred tanks may be functionally equivalent to stirred tanks. For example, loop reactors are widely used in the polymer industry, especially for solution and slurry-phase catalytic olefin polymerizations. In a loop reactor, the agitator in the stirred tank is replaced by a circulation pump.

In this work, a Mixed-Integer Dynamic Optimization approach is used for the simultaneous design and control of a styrene polymerization reactor. Our goal is to design the process and its control system in order to produce two polymer grades, which are defined in terms of the number average molecular weight (Mn).

2006年10月23日 · Some typical problems in the early design stages of a tubular loop reactor for bulk propylene polymerization are analyzed. Characteristic variables are identified, and a shortcut method for the preliminary estimation of the reactor dimensions is developed. the influences of process variables such as catalytic activity, suspended solid fraction ...

2017年9月1日 · LOOP TYPE REACTOR FOR POLYMERIZATION. The present invention is concerned with olefin polymerisation in slurry phase loop reactors, in particular in multiple reactor systems.

2025年1月5日 · This work aims at developing a rigorous model that can accurately describe hydrogen response and predict polymer chain microstructure for an industrial propylene polymerization process consisting of loop reactors in series. The model is comprised of a kinetic model, a thermodynamic model, and a macroscopic non-ideal loop reactor model.

2020年12月1日 · In the present paper a new two-phase multi-scale mathematical model of a tubular loop reactor is presented to describe the bulk polymerization of propylene. The model comprises transient mass...

2004年4月16日 · A dynamic mathematical model for liquid-phase polymerization in loop reactors was developed and implemented in language C using S-functions in a MATLAB/SIMULINK environment. It is based on a nonideal continuous stirred-tank reactor (CSTR) model capable of dealing with multisite copolymerization of olefins.

2008年9月26日 · A distributed mathematical model is presented for industrial liquid phase loop polypropylene reactors and validated with actual industrial data for the first time. The model is able to represent the dynamic trajectories of production rates, MFI and XS values during grade transitions within the experimental accuracy.