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Simulation and optimization of production of polymethyl-methacrylate (pmma) in continuous stirred tank reactor (cstr)

Simulation and optimization of production of polymethyl-methacrylate (pmma) in continuous stirred tank reactor (cstr) / Dayaalagunaa Shanmugam
Dalam kajian ini, pempolimeran metil metakrilat dalam model etil asetat menggambarkan penggunaan Aspen Polimer untuk memodelkan proses pempolimeran cecair untuk metil metakrilat dalam etil asetat. Antara kajian yang dijalankan menggunakan model ini adalah kesan kepekatan dan suhu reaktor atas berat molekul dan penukaran. Pempolimeran metil metakrilat ini dijalankan dalam proses radikal bebas. Pempolimeran cecair digunakan apabila kedua-dua monomer dan pemula yang larut dalam pelarut. Model proses PMMA yang digunakan untuk memeriksa pembolehubah proses seperti nombor penukaran dan berat berat molekul purata sebagai fungsi masa, pada tiga suhu reaktor yang berbeza. Model ini juga digunakan untuk mengkaji kesan kepekatan dan suhu pempolimeran pada yang berikut: masa reaksi untuk mencapai 99% penukaran monomer, beban haba puncak, jumlah dan berat berat molekul purata. Pada kepekatan yang berbeza dan suhu, masa yang berbeza untuk mencapai 99% penukaran direkodkan. Di samping itu, suhu tindak balas yang lebih tinggi dan kepekatan membolehkan penukaran monomer lebih cepat. Secara umum, kedua-dua bilangan dan berat purata kenaikan berat molekul seperti kenaikan suhu dan caj pemula berkurangan. Indeks Polydispersity juga berkurang apabila suhu meningkat, dan meningkatkan dengan peningkatan caj pemula. Model proses yang digunakan untuk penyelesaian pempolimeran metil metakrilat (MMA) di reaktor dikacau berterusan, dengan menggunakan AIBN sebagai pemula dan etil asetat itu sebagai pelarut telah dioptimumkan dengan menggunakan kecekapan kepekatan yang berbeza, f. Kesan f yang berbeza telah dikaji dan dibandingkan dengan kerja-kerja sebelum ini yang menggunakan nilai tetap f=0.53. Keputusan kajian ini menunjukkan bahawa kecekapan pemula, f tidak malar tetapi berkurangan dengan peningkatan penukaran monomer bersama proses. _______________________________________________________________________________________________________ In this study, the methyl methacrylate polymerization in ethyl acetate model illustrates the use of Aspen Polymers to model a solution polymerization process for methyl methacrylate in ethyl acetate. Among the studies carried out using this model are the effect of initiator concentration and reactor temperature on molecular weight and conversion. This methyl methacrylate polymerization is carried out in a free-radical solution process. Solution polymerization is used when both the monomer and the initiator are soluble in the solvent. The PMMA process model is used to examine process variables such as conversion number and weight average molecular weight as a function of time, at three different reactor temperatures. The model is also used to study the effects of initiator concentration and polymerization temperature on the following: reaction time to reach 99% monomer conversion, peak heat load, number and weight average molecular weight. At different initiator concentration and temperature, different time to reach 99% conversion is recorded. In addition, higher reaction temperature and initiator concentration allow faster monomer conversion. In general, both the number and weight average molecular weight increase as temperature increases and initiator charge decreases. Polydispersity Index also decreases as temperature increases, and increases as initiator charge increases. The process model used for solution polymerization of methyl methacrylate (MMA) in continuous stirred reactors, using AIBN as the initiator and ethyl acetate as the solvent was optimized by using different initiator efficiency, f. The effects of different f was examined and compared with previous work which used a constant value of f 0.53. The results of these studies show that initiator efficiency, f is not constant but decreases with the increase of monomer conversion along the process.
Contributor(s):
Dayaalagunaa Shanmugam - Author
Primary Item Type:
Final Year Project
Identifiers:
Accession Number : 875005650
Language:
English
Subject Keywords:
methyl; polymerization; monomer
First presented to the public:
5/1/2015
Original Publication Date:
8/10/2020
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 55
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2020-08-10 16:13:44.319
Submitter:
Mohd Jasnizam Mohd Salleh

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