Fabrikasi Dan Karakterisasi Membran Pemisahan Gas Dari Plastik High Density Polyethylene (HDPE)

Nareswari, Cininta (2024) Fabrikasi Dan Karakterisasi Membran Pemisahan Gas Dari Plastik High Density Polyethylene (HDPE). Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 6004212010-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 April 2026. Download (4MB) | Request a copy

Abstract

High density polyethylene (HDPE) merupakan salah satu jenis dari polietilen (PE) paling banyak digunakan di dunia, yang biasanya ditemukan sebagai kantong plastik. Masalah lingkungan yang serius dari limbah HDPE yang non-biodegradabel menjadi tantangan untuk dimanfaatkan terutama sebagai membran. Preparasi membran HDPE dilakukan dengan metode inversi fasa. Namun, pada metode inversi fasa mudah terbentuk lubang kecil atau cacat pada lapisan selektivitas. Pada penelitian ini dilakukan coating dengan PDMS untuk memperbaiki cacat pada membran, sehingga meningkatkan kinerjanya sebagai pemisahan gas. Membran dipreparasi dengan modulasi membran datar (flat-sheet) dan karakterisasinya menggunakan FTIR, SEM, TGA, XRD. Uji kinerja pemisahan dan permeabilitas terhadap gas H2, N2, CO2, dan CH4 dengan reaktor gas tunggal serta transport gas berupa koefisien kelarutan dan difusi gas. Selain itu, dilakukan uji pendahuluan berupa adsorpsi gas H2 dan CO2 untuk mengetahui kinerja membran. Pada adsorpsi gas dilakukan pengkajian berupa kapasitas adsorpsi, kinetika adsorpsi dan termodinamika. Kapasitas adsorpsi CO2 dan H2 tertinggi sebesar 4,82 dan 4,93 mmol.g-1 pada suhu 30°C. Penambahan suhu mengakibatkan penurunan kapasitas adsorpsi. Berdasarkan hasil uji parameter termodinamika mengindikasikan bahwa proses adsorpsi yang terjadi merupakan fisisorpsi dan eksotermik. Selain itu, kinetika adsorpsi pada suhu 30 °C mengikuti persamaan kinetika pseudo orde kedua. Oleh karena itu, kinerja dari membran ini lebih disukai pada suhu 30°C. Berdasarkan hasil kinerja pemisahan gas, permeabilitas tertinggi diperoleh pada membran dengan konsentrasi HDPE 15% yaitu 126,64 ± 3,02 (H2), 26,85 ± 0,53 (CO2), 55,33 ± 1,56 (N2) dan 47,16 ± 0,83 GPU (CH4). Penggunaan coating PDMS mengakibatkan penurunan permeabilitas dan peningkatan selektivitas gas. Selektivitas tertinggi pada H2/CO2 yaitu 6,10 ± 0,10 dengan peningkatan 23% setelah coating PDMS. Dapat disimpulkan bahwa, membran dengan variasi HDPE 15% coating PDMS cocok digunakan untuk pemisahan gas H2/CO2
=============================================================================================================================
High Density Polyethylene (HDPE) is one of the most widely used types of polyethylene (PE) in the world, which is usually found as plastic bags. The serious environmental problems of non-biodegradable HDPE waste make it a challenge to utilize it, especially as a membrane. HDPE membrane preparation was carried out using the phase inversion method. However, in the phase inversion method, small holes or defects easily form in the selectivity layer. In this research, PDMS was coated to repair defects in the membrane, thereby improving its performance as a gas verification agent. The membrane was prepared by modulating a flat membrane and characterization using FTIR, SEM, TGA, XRD. Performance and permeability tests for H2, N2, CO2 and CH4 gases with a single gas reactor as well as gas transport in the form of solubility and gas diffusion coefficients. Apart from that, a preliminary test was carried out in the form of adsorption of H2 and CO2 gas to determine the performance of the membrane. In gas adsorption, studies were carried out in the form of adsorption capacity, adsorption kinetics and thermodynamics. The highest CO2 and H2 adsorption capacity was 4.82 and 4.93 mmol.g-1 at a temperature of 30°C. Increasing temperature causes a decrease in adsorption capacity. Based on the results of thermodynamic parameter tests, it shows that the adsorption process that occurs is physisorption and exothermic. In addition, the adsorption kinetics at 30 °C follow the pseudo-first-order kinetic equation. Therefore, the performance of this membrane is preferable at 30°C. Based on the gas performance results, the highest permeability was obtained in membranes with an HDPE concentration of 15%, namely 126.64 ± 3.02 (H2), 26.85 ± 0.53 (CO2), 55.33 ± 1.56 (N2) and 47 .16 ± 0.83 GPU (CH4). The use of PDMS coating results in decreased permeability and increased gas selectivity. The highest selectivity for H2/CO2 was 6.10 ± 0.10 with an increase of 23% after PDMS coating. It can be concluded that membranes with variations in HDPE 15% PDMS layers are suitable for use for H2/CO2 separation.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	High density polyethylene, PDMS, pemisahan gas, spray coating, Gas separation
Subjects:	Q Science > QD Chemistry > QD63.S4 Separation (Technology)
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47101-(S2) Master Thesis
Depositing User:	Cininta Nareswari
Date Deposited:	16 Feb 2024 05:53
Last Modified:	16 Feb 2024 05:53
URI:	http://repository.its.ac.id/id/eprint/107197

Actions (login required)

View Item