Kinerja Mixed Matrix Membrane (MMM) Polisulfon (PSf)/Sm-NaY untuk Aplikasi Upgrading Biogas

Wahyudhie, Shalita Nafisah Putri (2022) Kinerja Mixed Matrix Membrane (MMM) Polisulfon (PSf)/Sm-NaY untuk Aplikasi Upgrading Biogas. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 01211840000025-Undergraduate_Thesis.pdf - Accepted Version Download (8MB)

Abstract

Prof. Nurul Widiastuti. Ph.D. : Dr. Triyanda Gunawan, S.Si. Indonesia sebagai produsen minyak kelapa sawit terbesar di dunia menghasilkan limbah pengolahan kelapa sawit (palm oil mill effluent, POME) dalam jumlah yang sangat besar setiap tahunnya. POME dapat sacara alami membentuk biogas bila tarurai melalui proses anaerob digester (AD). Pemanfaatan biogas berbasis POME sebagai bahan bakar alternatif masih sangat terbatas karena pengotor CO2 didalamnya dapat mengurangi nilai kalor dan menyebabkan korosi pada pipa. Mixed matrix membrane (MMM) sudah banyak digunakan untuk upgrading biogas karena prosesnya yang sederhana dan dengan kebutuhan biaya operasional yang relatif rendah. Pada penelitian ini, MMM flat sheet berbasis polisulfon (PSf) dengan filler zeolit NaY termodifikasi agen kopling silan (Sm-NaY) telah dipreparasi untuk pemisahan gas CO2/CH4. MMM dipreparasi dengan metode inversi fasa dengan variasi pemuatan Sm-NaY 0,5, 1, dan 1,5 %berat. Filler zeolit NaY dimodifikasi dengan (3-aminopropil)trimetoksisilan (APTMS) dengan tujuan meningkatkan kompatibilitas partikel filler dengan matriks polimer. Hasil XRD MMM menunjukkan penurunan d-spacing pada matriks polimer akibat penambahan partikel Sm-NaY, mengindikasikan terjadinya penurunan volume bebas matriks polimer akibat interaksi filler dengan polimer. Hasil EDX menunjukkan dispersi partikel Sm-NaY yang baik pada MMM. Namun, hasil SEM menunjukkan bahwa penambahan Sm-NaY pada jumlah 1,5 %berat mengakibatkan aglomerasi partikel pada permukaan MMM. Permeabilitas tertinggi MMM didapatkan sebesar 2,63 dan 1,88 Barrer masing-masing untuk CO2 dan CH4, menurun dari 11,91 dan 3,47 untuk membran pristine. MMM PSf/Sm-NaY 1,5 %berat menunjukkan peningkatan selektivitas CO2/CH4 sebesar 15,13% menjadi 4 jika dibandingkan dengan membran pristine PSf. Pelapisan membran dengan polidimetilsiloksan (PDMS) berhasil menutupi cacat pada membran, menyebabkan tren penurunan permeabilitas dan kenaikan selektivitas. MMM PDMS/PSf/Sm-NaY 0,5 %berat menunjukkan selektivitas CO2/CH4 sebesar 7,17, lebih tinggi 106,6% dibandingkan membran pristine PSf, dan lebih tinggi 79,3% dibandingkan selektivitas tertinggi MMM yang tidak terlapisi PDMS. Dari hasil uji permeasi gas, diprediksikan hasil kemurnian biogas berada dalam rentang 57,02-87,76%. Hasil ini menunjukkan hasil positif, mengingat kandungan CH4 dalam biogas tanpa pemurnian berkisar antara 50-75%. Kemurnian biogas paling tinggi dicapai dengan membran PDMS/PSf/Sm-NaY 0,5% yaitu 87,76%. Kinerja pemisahan CO2/CH4 MMM PSf/Sm-NaY berada di bawah batas atas Robeson. Namun, MMM PSf/Sm-NaY memiliki potensi mengingat kelebihannya yaitu menggunakan jumlah pemuatan filler yang relatif kecil.
===================================================================================================================================
Shalita Nafisah Putri Wahyudhie / 01211840000025 : Chemistry : Prof. Nurul Widiastuti. Ph.D. : Dr. Triyanda Gunawan, S.Si. Indonesia as the largest palm oil producer in the world produces a huge amount of palm oil waste (palm oil mill effluent, POME) every year. POME can naturally form biogas when decomposed through an anaerobic digester (AD) process. Utilization of POME-based biogas as an alternative fuel is still very limited because the CO2 impurities in it can reduce the calorific value and cause corrosion in pipes. Mixed matrix membrane (MMM) has been widely used for biogas upgrading because the process is simple and requires relatively low operational costs. In this study, polysulfone (PSf) flat sheet mixed matrix membranes (MMMs) with silane coupling agent modified NaY zeolite (Sm-NaY) filler was prepared for CO2/CH4 separation. MMMs was prepared with phase inversion method with variation in Sm-NaY loading namely 0,5, 1, and 1,5 wt%. NaY zeolite was modified with (3-aminopropyl)trimethoxysilane (APTMS) before used to prepare the MMM. Modification of NaY zeolite with APTMS was done to improve filler and polymer matrix compatibility. XRD result of MMMs showed decrease in polymer matrix’s d-spacing, indicating a decrease in membranes free volume due to good interaction between filler particle and polymer matrix. EDX results showed good dispersion of filler particle in MMMs. However, SEM result showed that Sm-NaY loading of 1,5 wt% caused agglomeration on membrane’s surface. Highest permeabilities obtained from the MMMs are 2,63 and 1,88 for CO2 and CH4 respectively, showing a decrease from 11,91 and 3,47 obtained from pristine PSf membrane. PSf/Sm-NaY 1,5 wt% MMM showed 15,13% increase in CO2/CH4 selectivity to 4 when compared to pristine PSf membrane. Membrane coating with polydimethylsiloxane (PDMS) successfully sealed membranes surface defects, causing a trend where permeability decreases but selectivity increases. PDMS/PSf/Sm-NaY 0,5 wt% MMM showed CO2/CH4 selectivity of 7,17, showing 106,6% increase from pristine PSf membrane, and is 79,3% higher when compared to the highest selectivity obtained from uncoated PSf/Sm NaY MMMs. From gas permeation results, biogas purity percentage is predicted to be in the range of 57,02-87,76%. This exhibits positive result concerning CH4 percentage in untrated biogas is ranging between 50-75%. Highest biogas purity prediction is obtained from PDMS/PSf/Sm-NaY 0,5 wt% MMM that is 87,76%. PSf/Sm-NaY MMMs CO2/CH4 separation performance is located below the Robeson upper bound. However, PSf/Sm-NaY MMMs showed potential considering its low filler loadings benefit.

Item Type:	Thesis (Other)
Additional Information:	RSKi 543.089 6 Wah k-1 2022
Uncontrolled Keywords:	Mixed matrix membrane, pemisahan CO2/CH4, upgrading biogas, polisulfon, zeolit termodifikasi aminosilan, Mixed matrix membrane, CO2/CH4 separation, biogas upgrading, polysulfone, aminosilane-modified zeolite
Subjects:	T Technology > TP Chemical technology > TP159.M4 Membranes (Technology) T Technology > TP Chemical technology > TP339 Ethanol as fuel. Biomass energy.
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	- Davi Wah
Date Deposited:	12 Dec 2024 06:52
Last Modified:	12 Dec 2024 06:52
URI:	http://repository.its.ac.id/id/eprint/115757

Actions (login required)

View Item