Prihasa, Novan (2021) PEMODELAN DAN SIMULASI REVERSE FLOW REACTOR (RFR) UNTUK OKSIDASI KATALITIK EMISI METANA TAMBANG BATUBARA: KAJIAN PENAMBAHAN UNGGUN ADSORBEN ZEOLIT. Master thesis, UNIVERSITAS SULTAN AGENG TIRTAYASA.
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Abstract
Coal mine methane emissions are one of the contributors to the greenhouse effect in global warming. One solution to oxidize methane to carbon dioxide is to use a Reverse Flow Reactor (RFR). However, the water content in coal mine emissions such as methane gas is usually quite high which can damage the catalyst and affect the RFR performance. The additions of zeolite adsorbent bed are expected to be able to reduce the composition of the water in the feed gas and eliminate the inhibition of the catalyst. The purposes of this research are to determine the effect of adding zeolite adsorbent bed to the reactor performance related to the RFR auto-thermal and heat stability properties, and to observe the dynamic behavior in the form of reactor temperature profiles and methane conversion. Mathematical modeling that will be used in this research is homogeneous one-dimensional (1D) modeling for mass balance, and heterogeneous for energy balance. Related data for the kinetics of the methane catalytic oxidation reaction, the physical properties of methane, the physical properties of the catalyst, the physical properties of the inert, and the physical properties of the adsorbent were taken from the literature. RFR modeling simulation was carried out using process computing techniques with FlexPDE software version 7. It starts with the operation variable without the addition of zeolite adsorbent bed. Then a comparison is made with the addition of zeolite adsorbent beds. In addition, the effect of differences in the concentration of methane feed, the composition of water in the feed gas, and the selection of switching time values are also study against RFR performance. The value of the methane feed concentration is directly proportional to the temperature value produced by the reactor. However, the value of the composition of water in the feed gas and the value of the switching time is inversely proportional to the temperature value produced by the reactor. Methane conversion value is strongly influenced by the temperature produced by the reactor. The integrated adsorption method using zeolite 4A was able to reduce the water inhibition of the coal mine methane feed gas stream
| Item Type: | Thesis (Master) | |||||||||
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| Additional Information: | Emisi metana pada tambang batubara merupakan salah satu kontributor efek rumah kaca dalam pemanasan global. Salah satu solusi untuk mengoksidasi metana menjadi karbondioksida adalah menggunakan Reverse Flow Reactor (RFR). Namun, kandungan air dalam emisi tambang batubara seperti gas metana biasanya cukup tinggi yang dapat merusak katalis dan berpengaruh terhadap unjuk kerja RFR. Penambahan unggun adsorben zeolit diharapkan mampu untuk mengurangi komposisi air pada gas umpan dan menghilangkan penghambatan pada katalis. Tujuan dari penelitian adalah mengetahui pengaruh penambahan unggun adsorben zeolit terhadap unjuk kerja reaktor terkait sifat auto-thermal dan kestabilan panas RFR, serta mengamati kelakuan dinamik berupa profil temperatur reaktor dan konversi metana. Pemodelan matematik yang digunakan dalam penelitian ini adalah pemodelan satu dimensi (1D) homogen untuk necara massa, dan heterogen untuk neraca energi. Data-data terkait kinetika reaksi oksidasi katalitik metana, sifat fisik metana, sifat fisik katalis, sifat fisik inert, dan sifat fisik adsorben diambil dari literatur. Simulasi pemodelan RFR dilakukan menggunakan teknik komputasi proses dengan perangkat lunak FlexPDE versi 7. Diawali dengan menggunakan variabel operasi tanpa penambahan unggun adsorben zeolit. Selanjutnya dilakukan perbandingan dengan penambahan unggun adsorben zeolit. Selain itu dikaji pula pengaruh perbedaan konsentrasi umpan metana, komposisi air pada gas umpan, dan pemilihan nilai switching time. Nilai konsentrasi umpan metana berbanding lurus terhadap nilai temperatur yang dihasilkan reaktor. Namun, nilai komposisi air pada gas umpan dan nilai switching time berbanding terbalik terhadap nilai temperatur yang dihasilkan reaktor. Nilai konversi metana sangat dipengaruhi oleh temperatur yang dihasilkan reaktor. Metode adsorpsi yang terintegrasi menggunakan zeolit 4A mampu mengurangi penghambatan yang disebabkan oleh komposisi air pada aliran gas umpan metana tambang batubara. | |||||||||
| Uncontrolled Keywords: | coal mine methane, reverse flow reactor, adsorbent bed, zeolite, water inhibition. emisi metana, reverse flow reactor, unggun adsorben, zeolit, penghambatan air. | |||||||||
| Subjects: | Q Science > QD Chemistry T Technology > TP Chemical technology |
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| Divisions: | 08-Pascasarjana > 84104-Magister Teknik Kimia 08-Pascasarjana |
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| Depositing User: | Novan Prihasa | |||||||||
| Date Deposited: | 12 Jun 2024 12:22 | |||||||||
| Last Modified: | 20 Jun 2024 10:26 | |||||||||
| URI: | http://eprints.untirta.ac.id/id/eprint/36177 |
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