Romzuddin, Muhammad and Pratama, Alvian (2016) Studi Kelayakan Proses Regenerasi Naoh Dalam Unit Acid Gas Removal Yang Menggunakan Membrane Electrolysis - Feasibility Study Of Naoh Regeneration In Acid Gas Removal Unit Using Membrane Electrolysis. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebutuhan energi dunia semakin meningkat seiring
dengan perkembangan peradaban manusia. Karena sumber energi
yang terbatas, pada 2020 diprediksikan bahan bakar fosil akan
digantikan sumber energi terbarukan. Salah satu energi
terbarukan yang potensial adalah biogas, karena kadar metana
yang tinggi. Biogas diproduksi melalui proses fermentasi bahan
organik pada lingkungan anaerobik dengan bakteri metanogen.
Selanjutnya, biogas harus dimurnikan dari senyawa pengotornya,
yaitu CO2 dan H2S melalui unit acid gas removal. Pemurnian ini
akan meningkatkan higher heating value biogas sebesar 600
hingga 900 Btu/scf. Pada pemurnian biogas dalam unit acid gas
removal, larutan NaOH digunakan sebagai absorban liquid yang
mnghasilkan produk samping garam alkali (brine) sebagai
limbah. Berikut ini adalah hasil dari studi kelayakan secara teknis
maupun ekonomis dalam proses regenerasi NaOH dari garam
alkali limbah unit acid gas removal dengan metode membrane
electrolysis. Prosedurnya adalah cell anoda diisi dengan larutan
brine, sedangkan cell katoda diisi dengan aqua DM
(demineralized). Cell katoda dan anoda dipisahkan oleh membran
penukar kation. Tegangan yang digunakan adalah 5, 10, 15, dan
20 V, sedangkan konsentrasi larutan KCl yang digunakan 0,01;
0,05; 0,1; dan 0,3 M. Temperatur feed bervariasi pada 30 dan
50oC. Hasilnya adalah persen recovery natrium meningkat seiring dengan tegangan, temperatur feed, dan menurun pada konsentrasi
larutan elektrolit KCl. Hasil terbaik dengan persen recovery
natrium terbesar adalah 95%, didapatkan pada kondisi operasi
30oC, tegangan 15 V dan konsentrasi larutan KCl 0,01 M. Pada
kondisi elektrolisis tersebut, efisiensi energi dapat dihitung
sebesar 0,009 M-NaOH/Wh, atau setara dengan Rp4600/kg Naoh.
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The world's energy demand is increasing with the
development of human civilization. Due to limited energy
resource, after 2020 fossil fuels thus is predicted will be replaced
by renewable resources. Taking an example, one of the potential
renewable energy to be considered is biogas, as its high content of
methane, which can be produced via the fermentation process of
the organic compounds under controlled anaerobic environment by
utilizing the methanogen bacteria. However prior the further use,
this biogas must be purified from its impurities contents, i.e. acid
gas of CO2 and H2S, up to 4% and 16 ppmv, respectively, in the
acid gas removal unit. This such of purification efforts, will
significantly increase the higher heating value of biogas,
approximately from 600 to 900 Btu/scf. During the purification
process in this acid gas removal unit, NaOH solution is used as a liquid absorbant to reduce those acid gases content, in which the
by-product of alkali salt (brine) was produced as waste. Here we
report the feasibility study of the NaOH regeneration process in
acid gas removal unit via membrane electrolysis technology, in
which both the technical and economical aspects are taken account.
To be precise in procedure, the anode semi-cell was filled with the
brine solution, while the cathode semi-cell was filled with
demineralized water, and those electrode were separated by the
cation exchange membrane. Furthermore the applied potential were varied ranging from 5, 10, 15 and to 20 V, while the
concentration of KCl electrolyte solutions were varied ranging
from 0,01; 0,05; 0,1; and to 0,03 M. This study was conducted
under controlled temperatures of 30 and 50C. Here we found that
the % sodium recovery was increased along with the applied
potential, temperature, and the decrease in KCl electrolyte
concentration. We found that the best results, by means of the
highest % sodium recovery, i.e. 95%, was achieved under the
experimental condition of temperature at 30C, applied potential at
15 V, and KCl electrolyte concentration at 0,01 M. At such
electrolysis condition, the energy efficiency was calculated to be
0,009 M-NaOH/Wh, or was equal to operating cost at $0.04/kg-
NaOH.
Biogas, Acid Gas Removal, Regenerasi Naoh, Dan
Membrane Electrolysis.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSK 665.776 Rom s |
| Uncontrolled Keywords: | Biogas, Acid Gas Removal, Regenerasi NaOH, dan Membrane Electrolysis, Biogas, Acid gas removal unit, NaOH regeneration, Membrane electrolysis. |
| Subjects: | T Technology > TP Chemical technology > TP359 Biogas |
| Divisions: | Faculty of Industrial Technology > Chemical Engineering |
| Depositing User: | ansi aflacha |
| Date Deposited: | 06 Dec 2019 03:08 |
| Last Modified: | 06 Dec 2019 03:08 |
| URI: | http://repository.its.ac.id/id/eprint/72242 |
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