Kamal, Siti Nadiah Mustafa (2015) Synthesis Of Inorganic And Polymeric Membranes With Sapo-44 Zeolite For Gas Separation. Masters thesis, Universiti Sains Malaysia.
![[img]](http://eprints.usm.my/style/images/fileicons/application_pdf.png)
|
PDF
- Submitted Version
Download (763kB) | Preview |
Abstract
Dalam kajian ini, membran jenis tak organik dan membran polimer yang melibatkan SAPO-44 telah dikaji. Membran jenis tak organik telah disintesis di atas penyokong α-alumina berbentuk cakera melalui kaedah pertumbuhan sekunder dan kesan pada suhu menyahkan templat telah dikaji. Manakala, dalam kajian membran polimer, polietersulfon (PES) dicampuri dengan kristal zeolit SAPO-44 disediakan melalui kaedah fasa balikan. Kesan pada membran PES sintesis berdasarkan parameter yang dijalankan, iaitu jenis pelarut, kepekatan polyethersulfone (17-27 %), masa penyejatan (30-2700 s) dan kepekatan polydimethylsiloxane (PDMS) (1-5 %) telah disiasat untuk kajianstruktur pada membran dan prestasi gas sebelum menambah kristal zeolit. Kesan penambahan zarah SAPO-44 (3-10 %) telah dikaji. Zeolit membran tak organic telah diuji untuk penyerapan gas tunggal CO2 and N2, manakala untuk membran polimer, tambahan gas CH4 dan H2 telah dijalankan. Pembuangan templat yang dijalankan di 375°C menghasilkan keputusannya membran yang bebas daripada retakan dan penyasingan gas yang optimum (CO2/N2 = 1.07). Pada suhu pembuangan templat yang lebih tinggi, penghabluran zeolit SAPO-44 telah hilang disebabkan oleh zeolit yang tidak teratur. Sebaliknya, dalam membran polimer PES, penambahan pelarut sampingan ke dalam larutan polimer didapati telah menurunkan kelikatan larutan dan menyebabkan tangguhan cecair-cecair berlaku semasa fasa penyongsangan. Liang-liang kecil telah terhasil di atas lapisan substruktur dan lapisan liang-liang menjadi tebal semasa peningkatan penyejatan pelarut sebelum membrane mengeras dalam bukan pelarut. Lapisan PDMS di atas membran PES yang mempunyai lapisan kulit tebal mempamerkan keputusan yang lebih tinggi berbanding dengan membran yang tidak bersalut di atasnya. Membran polimer yang mengandungi THF bersama pelarut dengan masa penyejatan 60 saat dan 3% penyalutan PDMS didapati membran yang paling optimum antara membran yang lain dalam kerja-kerja ini dengan menghasilkan pengeluaran gas CO2 sebanyak 44.86 GPU. Pengeluaran gas CO2 telah meningkat kira-kira empat kali ganda apabila menambah 10% zeolit SAPO-44 di dalam membran PES/PDMS. ________________________________________________________________________________________________________________________ In the present research, inorganic and polymeric membranes involving SAPO-44 application were studied. Inorganic membranes were synthesized on α-alumina disc support by secondary growth method and the effect of calcination temperature of inorganic membrane was investigated. Meanwhile in polymeric membrane study, polyethersulfone (PES) membranes filled with SAPO-44 zeolite particles were fabricated via phase inversion method. The effects of PES membrane synthesis parameters, which are types of co-solvents, PES concentration (17-27 wt%), evaporation time (30 - 2700 s) and polydimethylsiloxane (PDMS) concentration (1 - 5 wt%) were investigated in order to study the changes in membrane morphology and gas performance before adding SAPO-44 particles. Then, the effects of SAPO-44 loading (3 - 10 wt%) were studied. The inorganic membranes were tested for single gas permeation of CO2 and N2, while for polymeric membrane, additional CH4 and H2 permeation tests were also conducted. Calcination temperature conducted at 375°C formed defect-free SAPO-44 membrane with CO2 displayed more permeable through the SAPO-44 zeolite membrane compare to N2 (CO2/N2 selectivity of 1.07). At the higher temperature, the crystallinity of SAPO-44 zeolite was lost due to the disorganization of zeolite. In contrast, the addition of co-solvent into the PES polymer solution decreased the dope viscosity and delayed liquid-liquid demixing during phase inversion. The microvoids were formed on top of substructure layer and the microvoids layer became thicker due to the increasing of solvent evaporation time. The PDMS coating on the PES membrane formed a dense skin layer and exhibited higher selectivity compared to the uncoated membrane. 20PT-3 is the optimum membrane among other fabricated polymeric membranes in this work with CO2 permeance of 44.86 GPU. The CO2 permeance was increased about four times when adding 10 wt% of SAPO-44 in PES/PDMS membrane.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | Full text is available at http://irplus.eng.usm.my:8080/ir_plus/institutionalPublicationPublicView.action?institutionalItemId=3084 |
| Subjects: | T Technology T Technology > TP Chemical Technology > TP155-156 Chemical engineering |
| Divisions: | Kampus Kejuruteraan (Engineering Campus) > Pusat Pengajian Kejuruteraan Kimia (School of Chemical Engineering) > Thesis |
| Depositing User: | Mr Mohd Jasnizam Mohd Salleh |
| Date Deposited: | 30 Aug 2018 03:59 |
| Last Modified: | 30 Aug 2018 03:59 |
| URI: | http://eprints.usm.my/id/eprint/41602 |
Actions (login required)
 |
View Item |
