Preparasi Mixed Matrix Membrane Psf/Graphene Untuk Pemisahan Gas CO2/CH4.

Lusman, Saiko Rahmadi (2022) Preparasi Mixed Matrix Membrane Psf/Graphene Untuk Pemisahan Gas CO2/CH4. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kandungan organik pada Palm Oil Mill Effluent (POME) yang tinggi dapat berpotensi digunakan menjadi produk bernilai tambah seperti biogas. Biogas yang dihasilkan mengandung metana (CH4) yang dapat digunakan sebagai energi dan karbon dioksida (CO2) yang tidak diinginkan. proses upgrading diperlukan untuk mengurangi konsentrasi CO2 yang tinggi dan meningkatkan kandungan CH4. Pada penelitian ini telah berhasil difabrikasi mixed matrix membranes dengan matriks polimer polisulfon dan material pengisi graphene dengan variasi pemuatan pengisi sebesar 0,5%; 1%; dan 1,5% b/b relatif terhadap polisulfon. Material pengisi graphene difabrikasi dengan prekursor grafit menggunakan metode eksfoliasi secara elektrokimia. MMM PSf/Graphene difabrikasi menggunakan metode inversi fasa (NIPS) agar terbentuk membran asimetris. Hasil karakterisasi menggunakan instrumen X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), dan Scanning Electron Microscopy (SEM) menunjukkan adanya pengaruh penambahan material pengisi graphene dan pelapisan PDMS terhadap struktur maupun morfologi pada Membran PSf murni dan MMM PSf/Graphene. Secara umum urutan permeabilitas gas CO2 pada membran PSf murni dan MMM PSf/Graphene secara berurutan adalah PSf murni > PSf/Graphene (1% > 0,5% > 1,5%) b/b non-PDMS > PSf/Graphene (1% > 0,5% = 1,5%) b/b dengan PDMS. Sedangkan pada permeabilitas gas CH4, didapatkan urutannya adalah PSf murni > PSf/Graphene (1% > 0,5% > 1,5%) b/b non-PDMS > PSf/Graphene (1,5% > 1% > 0,5%) b/b dengan PDMS. Selektivitas gas CO2/CH4 yang optimum teramati pada MMM PSf/Graphene yang dilapisi PDMS dengan variasi pemuatan material pengisi graphene 0,5% dan 1% b/b dengan peningkatan masing-masing sebesar +212,86% dan +10,34% terhadap membran PSf murni. Pada pemenuhan permintaan industri mengenai minimal % kemurnian gas CH4 sebesar 90-95%, didapatkan bahwa membran yang memenuhi untuk standar dari proses upgrading biogas adalah MMM PSf/Graphene 0,5% b/b dengan pelapisan PDMS dengan % kemurnian CH4 sebesar 91,56%. Hasil dari perbandingan menggunakan kurva Robeson menunjukkan bahwa pada seluruh membran dari penelitian ini masih berada dibawah garis batas Robeson. MMM PSf/Graphene berpotensi digunakan untuk pemisahan gas CO2/CH4 karena dengan pemuatan material pengisi graphene yang sedikit saja sudah dapat menghasilkan kinerja pemisahan gas yang cukup baik.===================================================================================================================================
The high organic content of Palm Oil Mill Effluent (POME) can potentially be used into value-added products such as biogas. The biogas produced contains methane (CH4) which can be used as energy and carbon dioxide (CO2) which is unwanted. Upgrading process is required to reduce the high CO2 concentration and increase the CH4 content. In this research, mixed matrix membranes have been successfully fabricated with a polysulfone polymer matrix and graphene filler material with filler loading variations of 0,5%; 1%; and 1,5% by weight relative to polysulfone. Graphene filler material is fabricated with graphite precursor using electrochemical exfoliation method. MMM PSf/Graphene was fabricated using the phase inversion method (NIPS) to form an asymmetric membrane. The results of characterization using X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Scanning Electron Microscopy (SEM) instruments indicate the effect of adding graphene filler material and PDMS coating on the structure and morphology of pure PSf membranes and MMM PSf/Graphene. In general, the order of CO2 gas permeability on pure PSf and MMM PSf/Graphene membranes respectively is pure PSf > PSf/Graphene (1% > 0.5% > 1.5%) w/w non-PDMS > PSf/Graphene (1 % > 0.5% = 1.5%) w/w with PDMS. Meanwhile, for CH4 gas permeability, the sequence is pure PSf > PSf/Graphene (1% > 0.5% > 1.5%) w/w non-PDMS > PSf/Graphene (1.5% > 1% > 0, 5%) w/w with PDMS. Optimum selectivity of CO2/CH4 gas was observed in PSf/Graphene MMM coated with PDMS with a loading variation of 0.5% and 1% w/w graphene filler with an increase of +212.86% and +10.34%, respectively compared to pure PSf membrane. In fulfilling the industrial demand regarding a minimum % purity of CH4 gas of 90-95%, it was found that the membrane that meets the standards of the biogas upgrading process is MMM PSf/Graphene 0.5% w/w with PDMS coating with % CH4 purity of 91.56 %. The results of the comparison using the Robeson curve show that all membranes from this study are still below the Robeson boundary line. MMM PSf/Graphene has the potential to be used for CO2/CH4 gas separation because with a small amount of graphene as filler, it can produce a fairly good gas separation performance.

Item Type:	Thesis (Other)
Additional Information:	RSKi 543.089 6 Lus p-1 2022
Uncontrolled Keywords:	Pemisahan Gas, Mixed Matrix Membranes, Polisulfon, Graphene. Gas Separation, Mixed Matrix Membranes, Polysulfone, Graphene.
Subjects:	T Technology > TP Chemical technology > TP159.M4 Membranes (Technology)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	05 May 2026 07:21
Last Modified:	06 May 2026 06:51
URI:	http://repository.its.ac.id/id/eprint/132984

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