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A study of mixing performance in a microreactor using computational fluids dynamic (cfd)

A study of mixing performance in a microreactor using computational fluids dynamic (cfd) / Siti Nor Azreen Ahmad Termizi
Bergerak menuju masa depan kejuruteraan kimia yang lebih sebagai tindak balas kepada perubahan keperluan and kehendak, memerlukan keseimbangan antara alam sekitar, keselamatan and kos dalam penghasilan sesuatu produk. Pertumbuhan proses intensifikasi dilihat sebagai satu jalan untuk mencapai matlamat ini. Reaktor mikro merupakan salah satu peranti terintensif yang terhasil daripada proses intensifikasi memerlukan pemahaman tentang ilmu asas supaya ianya boleh digunakan secara menyeluruh. Justeru itu, tujuan kajian ini dilakukan untuk mencirikan percampuran dan menilai prestasi percampuran dalam elemen pencampur milik Standard Slit Interdigital Micro Mixer (SSIMM) dengan konfigurasi saluran mikro yang berbeza. Penyiasatan ke atas kesan konfigurasi saluran mikro, halaju masuk dan pekali resapan terhadap keamatan pencampuran dilakukan dengan menggunakan simulasi pengkomputaran dinamik bendalir (CFD). Keputusan menunjukkan halaju masuk mempunyai kesan yang nyata kepada prestasi pencampuran yang diwakili oleh keamatan pencampuran dalam kajian ini. Halaju yang lebih tinggi menghasilkan kualiti pencampuran yang rendah. Halaju 1000 μm/s dan 10000 μm/s menunjukkan nilai keamatan pencampuran yang rendah dan pencampuran yang rendah di penghujung slit keluar. Pekali resapan yang tinggi menyebabkan proses pencampuran lebih cepat. Pencampuran berlaku serta merta pada pekali resapan 1.0x10-8 m2/s. Profil keamatan pencampuran milik saluran mikro yang beralun yang mewakili elemen pencampur dalam SSIMM menunjuk trend yang licin berbanding dua konfigurasi saluran mikro yang lain. _______________________________________________________________________________________________________ Moving towards better future of chemical engineering in respond to the changing need and demand requires complementary of environmental, safety and cost in production of a product. The growth of process intensification has found to be the path to achieve this goal. Microreactor is one of the intensified equipment which is a product of process intensification, which requires understanding of the fundamental knowledge in order for it to be fully utilised. Therefore, the purpose of this study is to characterize mixing and to evaluate mixing performance of the Standard Slit Interdigital Micro Mixer (SSIMM) mixing element with different configurations of microchannel. Investigation on the effects of microchannel configurations, inlet velocity and diffusion coefficient toward mixing intensity was conducted using Computational Fluid Dynamics (CFD) simulation. The result showed that inlet velocity has significance effects on the mixing performance which represented by mixing intensity in this study. Higher inlet velocity resulted in lower mixing quality. The inlet velocity of 1000 μm/s and 10000 μm/s give low mixing intensity and incomplete mixing at the end of discharge slit position. High diffusion coefficient value gave faster mixing process. The mixing process occurred instantaneously at diffusion coefficient value of 1.0x 10-8 m2/s. The mixing intensity profile of corrugated microchannel which represents the mixing element of the SSIMM showed a smooth trend as compared to the other two microchannel configurations.
Contributor(s):
Siti Nor Azreen Ahmad Termizi - Author
Primary Item Type:
Thesis
Identifiers:
Accession Number : 
Language:
English
Subject Keywords:
chemical; environmental; Microreactor
First presented to the public:
3/1/2016
Original Publication Date:
10/11/2019
Previously Published By:
Universiti Sains Malaysia
Place Of Publication:
School of Chemical Engineering
Citation:
Extents:
Number of Pages - 116
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2019-11-12 12:43:11.417
Date Last Updated
2020-07-23 10:52:43.011
Submitter:
Mohd Jasnizam Mohd Salleh

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