Adsorpsi Gas CO2 pada Cu@Karbon Tertemplat Zeolit

Gaol, Immanuel Nathanael Lumban (2025) Adsorpsi Gas CO2 pada Cu@Karbon Tertemplat Zeolit. Other thesis, institut Teknologi Sepuluh Nopember.

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Abstract

Penanggulangan perubahan iklim dan pemanasan global umumnya berfokus pada penghapusan emisi karbon dari produksi dan transportasi energi. Teknologi Carbon Capture, Utilization, and Storage (CCUS) saat ini dikembangkan untuk menghilangkan atau menyerap karbon dari atmosfer. Pada penelitian sebelumnya, karbon tertemplat zeolit (KTZ) disintesis dengan glukosa sebagai prekursor karbon dan templat zeolit-Y sebagai adsorben gas CO2. Namun, kinerja adsorpsi CO2 dari KTZ masih belum optimal. Penambahan filler sangat memengaruhi kinerja adsorpsi CO2 pada KTZ. Penelitian ini berfokus untuk mengembangkan filler baru berbasis Cu pada matriks KTZ untuk adsorpsi gas CO2. Atas dasar itu, penelitian ini bertujuan untuk mengetahui rasio massa optimal dari Cu:KTZ pada Cu@KTZ untuk adsorpsi gas CO2. Keberhasilan sintesis adsorben dikonfirmasi melalui karakterisasi seperti Fourier-Transform Infrared (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy-Electron Dispersive X-ray (SEM-EDX), serta adsorpsi-desorpsi N2 isotermal. Pada pengujian adsorpsi gas, dilakukan pengkajian berupa kapasitas adsorpsi, kinetika adsorpsi dan termodinamika untuk mengidentifikasi mekanisme adsorpsi gas CO2. Hasil penelitian menunjukkan bahwa kapasitas adsorpsi gas CO2 pada Cu@KTZ 1:2 yaitu 21,793 ± 1,090 mmol.g-1 atau meningkat 45,393%. terhadap adsorben KTZ pada tekanan 1 bar dan suhu 30°C. Proses adsorpsi CO2 pada Cu@KTZ 1:2 pada suhu 30, 40, dan 50°C mengikuti model pseudo orde kedua dengan konstanta lajunya masing-masing yaitu 1 × 10-3, 1 × 10-3, dan 2 × 10-3 mmol.g-1.menit-1. Analisis termodinamika menunjukkan bahwa proses adsorpsi gas CO2 pada Cu@KTZ 1:2 berlangsung secara eksotermis dengan Cu@KTZ 1:2 secara fisisorpsi dengan nilai entalpi (ΔH) kurang dari 80 kJ.mol-1 yaitu -31,206 kJ.mol-1. Lalu, terjadi peningkatan eteraturan dari pergerakan gas selama proses adsorpsi di dalam pori Cu@KTZ 1:2 ditandai dengan nilai entropi gas (ΔS) yang semakin negatif pada Cu@KTZ 1:2 dan proses tersebut secara spontan dengan nilai energi bebas Gibbs (ΔG) bernilai negatif. Berdasarkan analisis hukum Arhenius, energi aktivasi (Ea) selama proses adsorpsi pada Cu@KTZ 1:2 bersifat eksotermik, sehingga suhu rendah jauh lebih efektif dan efisien untuk proses adsorpsi. Ini menunjukkan bahwa Cu@KTZ 1:2 dapat meningkatkan kinerja adsorpsi gas CO2 secara optimal pada suhu rendah.
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Efforts to fighting climate change and global warming primarily concentrate on reducing carbon emissions associated with energy production and transportation. Carbon Capture, Utilization, and Storage (CCUS) technology has been developed to absorb carbon from atmosphere. In previous study, zeolite templated carbon (ZTC) is synthesized from glucose as carbon precursor and zeolite-Y template as adsorbent for CO2 gas. Nevertheless, the CO2 adsorption performance of ZTC is not yet optimal. The incorporation of filler has a significant effect on the CO2 adsorption capabilities of ZTC. This research focuses on creating a new copper-based filler within ZTC matrix enhancing CO2 gas adsorption. Accordingly, the study aimed to identify the optimal mass ratio of Cu to ZTC in the Cu@ZTC composite for effective CO2 adsorption. The successful adsorbent synthesis was confirmed through characterization such as Fourier-Transform Infrared (FTIR), X-Ray Diffraction (XRD), Scanning Electron Microscopy-Electron Dispersive X-ray (SEM-EDX), and isothermal adsorption-desorption of N2. In the gas adsorption tests, studies were conducted on adsorption capacity, adsorption kinetics, and thermodynamics to identify the mechanisms of CO2 gas adsorption. The results showed that the CO2 adsorption capacity on Cu@ZTC 1:2 was 21.793 ± 1.090 mmol.g-1, which was an increase of 45.393% compared to ZTC at pressure of 1 bar and temperature of 30°C. The CO2 adsorption process on Cu@ZTC 1:2 at temperatures of 30, 40, and 50°C followed a pseudo-second-order model with rate constants of 1 × 10-3, 1 × 10-3, and 2 × 10-3 mmol.g-1.minute-1, respectively. Thermodynamic analysis indicated that CO2 adsorption process on Cu@ZTC 1:2 is exothermic, with physical adsorption characterized by an enthalpy change (ΔH) of less than 80 kJ.mol−1, specifically -31.206 kJ.mol−1. Furthermore, there was an increasement in the orderliness of gas movement during adsorption process within pores of Cu@ZTC 1:2, indicated by increasingly negative entropy values (ΔS) for Cu@ZTC at this ratio, and the process was spontaneous with a negative Gibbs free energy change (ΔG). Based on Arrhenius law analysis, the activation energy (Ea) during the adsorption process on Cu@ZTC 1:2 is exothermic, making low temperatures more effective and efficient for the adsorption process of CO2. This indicated that Cu@ZTC 1:2 can optimally enhance CO2 gas adsorption performance at low temperatures.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Adsorpsi, CO2, Filler Cu, KTZ, Zeolit, Adsorption, CO2, Cu Filler, Zeolite, ZTC.
Subjects:	T Technology > TP Chemical technology > TP155.7 Chemical processes. T Technology > TP Chemical technology > TP159.M6 Zeolites
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Chemistry > 47201-(S1) Undergraduate Thesis
Depositing User:	Immanuel Nathanael Lumban Gaol
Date Deposited:	25 Jan 2025 12:34
Last Modified:	25 Jan 2025 12:34
URI:	http://repository.its.ac.id/id/eprint/116855

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