Sintesis Komposit Karbon Membran P84/C-ZIF-8 Untuk Pemisahan Gas CO2

Putri, Zeva Nathania Yuke (2026) Sintesis Komposit Karbon Membran P84/C-ZIF-8 Untuk Pemisahan Gas CO2. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Emisi CO₂ dari sektor industri mendorong pengembangan teknologi membran pemisahan gas yang efisien. Membran polimer konvensional menghadapi keterbatasan fundamental berupa trade-off permeabilitas–selektivitas serta kerentanan terhadap plasticisasi CO₂, sehingga diperlukan pendekatan karbon membran yang mampu melampaui batas atas Robeson. Penelitian ini mengembangkan Carbon Hollow Fiber Mixed Matrix Membrane (HFCM) berbasis ko-poliimida P84 dengan pengisi karbon turunan ZIF-8 melalui pirolisis dual-step. Variasi penelitian meliputi sintesis karbon ZIF-8 ex-situ pada suhu 600, 700, dan 800 °C, di mana ZT350-700 terpilih sebagai filler optimal. Membran hollow fiber P84/ZIF-8 1% difabrikasi menggunakan metode dry-jet wet spinning, kemudian dipirolisis pada suhu akhir 600, 700, dan 800 °C menghasilkan HFCMZ600, HFCMZ700, dan HFCMZ800. Kinerja pemisahan dievaluasi melalui pengujian gas tunggal H₂, N₂, CH₄, dan CO₂ dengan metode pressure rise. HFCMZ700 menunjukkan kinerja optimal dengan permeabilitas CO₂ 317,82 ± 3,39 Barrer, permeabilitas H₂ 221,93 ± 0,16 Barrer, selektivitas CO₂/N₂ 4,64 ± 0,05, dan selektivitas CO₂/CH₄ 3,57 ± 0,04. Kinerja HFCMZ600 dan HFCMZ700 untuk pasangan H₂/CO₂ mendekati batas atas kurva Robeson 2008. Sementara itu, pemisahan CO₂/CH₄ dan CO₂/N₂ oleh HFCMZ700 dikonfirmasi melalui analisis FINDEX pada level baik (1,5–4). Keunggulan HFCMZ700 didukung oleh morfologi permukaan tanpa celah antarmuka, berbeda dengan HFCMZ600 dan HFCMZ800 yang menunjukkan structural defects akibat karbonisasi tidak sempurna dan over-shrinkage. Penelitian ini membuktikan bahwa suhu final karbonisasi 700 °C merupakan kondisi optimal yang menghasilkan keseimbangan karbonisasi, kompatibilitas antarmuka, dan pembentukan karbon untuk pemisahan gas CO₂.
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Industrial CO₂ emissions have driven the need for efficient membrane-based gas separation technologies. Conventional polymer membranes face fundamental limitations including the permeability–selectivity trade-off and susceptibility to CO₂-induced plasticization. This study develops Carbon Hollow Fiber Mixed Matrix Membranes (HFCM) based on P84 co-polyimide incorporating ZIF-8-derived carbon fillers via dual-step pyrolysis as a strategy to overcome these limitations. ZIF-8-derived carbon fillers were synthesized ex-situ at carbonization temperatures of 600, 700, and 800 °C, with ZT350-700 identified as the optimal filler based on CO₂ adsorption capacity and micropore distribution. P84/ZIF-8 1 wt% hollow fiber membranes were fabricated by dry-jet wet spinning, then pyrolyzed at final temperatures of 600, 700, and 800 °C to produce HFCMZ600, HFCMZ700, and HFCMZ800. Separation performance was assessed through single gas permeation tests of H₂, N₂, CH₄, and CO₂ using the pressure rise method. HFCMZ700 exhibited the best overall performance, achieving CO₂ permeability of 317.82 ± 3.39 Barrer, H₂ permeability of 221.93 ± 0.16 Barrer, CO₂/N₂ selectivity of 4.64 ± 0.05, and CO₂/CH₄ selectivity of 3.57 ± 0.04. The H₂/CO₂ separation performance of HFCMZ600 and HFCMZ700 nearly surpassed 2008 Robeson upper bound. However, FINDEX analysis confirmed HFCMZ700 at competent level (1.5–4) for CO₂/N₂ and CO₂/CH₄. Morphological analysis confirmed that HFCMZ700 possessed a defect-free surface, while HFCMZ600 and HFCMZ800 exhibited interfacial voids due to incomplete carbonization and over-shrinkage, respectively. These findings demonstrate that 700 °C is the optimal pyrolysis temperature, producing the ideal balance of carbonization, interfacial compatibility, and for CO₂ gas separation applications.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Membran Karbon, Membran Serat Berongga, P84 ko-poliimida, Pemisahan Gas, ZIF-8, Carbon Membrane, Gas Separation, Hollow Fiber Membrane, P84 co-polyimide, ZIF-8
Subjects:	Q Science > Q Science (General) Q Science > QD Chemistry Q Science > QD Chemistry > QD63.S4 Separation (Technology) T Technology > TP Chemical technology T Technology > TP Chemical technology > TP1140 Polymers T Technology > TP Chemical technology > TP159.M4 Membranes (Technology)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Zeva Nathania Yuke Putri
Date Deposited:	03 Aug 2026 04:37
Last Modified:	03 Aug 2026 04:37
URI:	http://repository.its.ac.id/id/eprint/142219

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